Wednesday, April 30, 2014

Fire Alarm Addressable Manual Call Points

Fire Alarm Addressable Manual Call Points
Most Commercial and Industrial Fire Alarm Systems installed haveing Call Point units or Manual call point (MCP) or Manual Pull station as part of the system. I also commissioned one/two addressable fire detection system where maximum is Manual call station/pull station and very less Detectors. These units are often the most visual indication of a fire alarm system and are instantly recognizable. Here we discuss various brand Manual Pull Station / Manual Call Station, Like; Cooper, Notifire, EST, BOSCH, Simplex, GST, Morley IAS, etc.

Manual Call Points (MCPs) are referred to or referenced by different names in various regions worldwide like Break Glass Units (BGs), Pull Stations, Push Buttons, Alarm Points, etc.

When should a Manual Call Point be used? In the event of a fire in a building; or if there is no automatic detection activated by the installed heat & smoke detection or any other detectors; or if you discover the fire personally and if there is an emergency condition – you need to activate the Manual Call Point to trigger the Fire Detection And Alarm System (FDAS) in the building so that the system initiates the necessary notification devices and sends signals to many other third party systems (Voice Evacuation, Emergency Lighting, Smoke Control, Lifts, etc.) in the building.

Introduction to Call Points
In order to comply with BS EN 54-11 (The European / British Standard referring to manual call points) fire alarm call points should be Red. There are a variety of different call point manufacturers and types of call points, however within a single building it is good practice to use call points similar in appearance to avoid confusion. Call Points are available for Conventional / Non-addressable Fire Alarm Systems, Analogue Addressable Fire Alarm Systems.  There are also specialist call points available for different applications such as weatherproof / waterproof / Explosion proof call points and call points operated by a key switch instead of an element.

Where to Position Call Points?

BS5839 recommends that call points should be located on all final exits, all storey exits i.e. entrances to stairwells and also consideration should be taken to locating call point units near to any high risks or special hazards (e.g. in Kitchens or Spray Booths etc.).
All manual call points which make up a fire alarm system, should comply to BS EN54-11 and be single action type A versions.
When carrying out a fire alarm system design the manual call point should be sited as follows:-
  • On all storey exits and all exits to open air irrespective of whether they are designated fire exits or not.
  • Nobody should have to travel more than 45 metres within the building to reach a manual call point, except if the exit routes are undefined in which case the direct line distance should not exceed 30 metres.
  • The above distances should be reduced to 25 and 16 metres respectively, if there are persons with limited mobility or there is a likelihood of rapid fire development.
  • A manual call point should be positioned in all areas of high fire risk, such as kitchens for example.
  • Where phased evacuations are planned, a manual call point needs to be sited on all exits from a particular zone.
  • Manual Call Points should be positioned 1.4 metres + or - 200mm above the floor.
  • Manual Call Points with protective hinged covers for whatever reason should be listed as a variation from the recommendations of BS5839 on the fire alarm system certification.
Please Note:- In order to comply with the requirements of building regulations approved document M, which requires electrical switches including manual call points to be mounted at between 1 meter + or - 200mm on wheelchair access routes, these should be listed as a variation on the certificates as BS requires manual call points to be mounted at 1.4 meters high + or - 200mm.
Every Manual pull station / Manual call point (Devices/Element) need one address for communicating with addressable fire alarm panel. It’s connected with Loop. No need to put extra power for that. 

As per UAE Fire and Life Safety Code:
🔥 The manual call points shall be used only for fire alarm initiation. In addition, all manual call points within an occupancy shall be of similar design.
🔥 Distribution of the manual call points should be such that the travel distance should not be more than 61m to reach the nearest manual call point.
🔥 These figures are to be reduced to 25m and 16m in limited mobility areas and where processes of the area result in a likelihood of rapid-fire development.
🔥 A Manual Call Point shall be installed within 1.5 m from the exit door opening.
🔥 The manual call points shall be installed generally at the height of 1.2 m, above floor level, and in plain, accessible, well-lit, and free-hindrances places.

1.     Apollo:
Installation Guide:
A)    Fit the back box (Fig. 1) to the wall.
Note: All MCP installation and securing screws have a maxium tightening torque of
0.6Nm.
B)    Run the cables from the loop into the backbox and connect them to the terminal block as shown in Fig. 3. Ensure that functional earth/screen continuity is maintained.
C)   If a loop continuity test is to be performed, it should be carried out before securing the call point to the backbox (step 4). Insert the continuity link supplied with the backbox (Fig. 4) into the terminal block before testing. After testing for continuity, remove the connector and store for re-use.
D)   The Element must be in the ACTIVATED position when either removing or replacing the Front Cover Assembly.
E)    Push the centre of the Element (printed with two black arrows and a circle) until the yellow and black striped indicator is visible. Unlock the front cover by inserting the protruding pins of the key into the underside of the manual call point, pull the bottom of the front cover towards you, slide it upward and remove. If required, replace the element. Set the unit address on the DIL switch in accordance with the address table. Connect the terminal block as shown in Fig. 3 and secure the call point to the backbox.
The Addressable Manual Call Points listed above are suitable for indoor use only. For flush mounting, a suitable single-gang mounting box (minimum 20mm depth) is required. All wiring terminals accept solid or stranded cables up to 2.5mm².

LED Indicator: 1. Illuminated red (under CIE control) when call point is operated 2. Illuminated yellow when short-circuit isolator has operated (version with integrated isolator). 3. Flashing red (under CIE control) when MCP is polled by the control panel (Discovery only).
Address Setting: The address of the Manual Call Point is set using the DIL switch. All segments of the switch are set to 0 or 1, using a small screwdriver or similar tool. Address: 01 is 1000000; Address: 02 is 0100000; Address: 03 is 1100000; Address: 04 is 0010000; Address: 05 is 1010000; Address: 10 is 0101000; address: 20 is 0010100; Address: 30 is 0111100; Address: 50 is 0100110; Address: 63 is 1111110; Address: 64 is 0000001; Address: 100 is 0010011; Address: 126 is 0111111. The switch in Fig 5 shows address setting 78 as an example of how to set the address.

Replacing the Element: Remove the front cover as described in Installation section. Follow instructions to replace the element.

This MCP are compatible with the Apollo series Addressable panel & Morley IAS but need to check Device Compatibility list from Morley IAS.

2.     : AUTRONICA FIRE
BF-502 is a manual call point for use in harsh environmental conditions. The call point has been designed for use with Autronica’s interactive fire detection system, and comprises the SelfVerify function. This function ensures the highest grade of reliability and the lowest degree of manual testing, because all units comprising this function are automatically self-tested once every 24 hours.
This MCP are compatible with the Autronica fire panel. Only Authorized System Integrator can commissioned this Product.

3.     : BOSCH
The FMC.210.DM Manual Call Points are used for manual triggering, and are deployed in the Local Security Network LSN and LSN improved. Automatic or manual detector addressing via rotary switch possible. Indicator LED for alarm or for inspection evaluation.
This MCP are compatible with the BOSCH series Addressable panel & Commissioning done by authorized System Integrator / Distributor. Most 3rd class technical support in INDIA of BOSCH, Do not suggest any one.

4.     : CERBERUS PYROTRONICS
The addressable manual fire alarm box shall incorporate a custom microprocessor based integrated circuit which shall provide communication with its compatible control panel. The addressable manual fire alarm box shall be a Cerberus Pyrotronics Model MSI-10B or MSI-20B which shall be compatible with both the Cerberus Pyrotronics MXL, IXL/ICON-1 and XL3 control panels
The addressable manual fire alarm box shall be constructed of durable molded polycarbonate material which is matte finished in red with raised white lettering. The housing shall accommodate a “pull down” lever, which when operated locks in position after releasing a spring loaded switch. To indicate the manual fire alarm box has been activated, the pull down lever shall remain down and locked until the manual fire alarm box is reset. The manual fire alarm box shall be reset only by opening the hinged housing cover with an allen key and then closing and locking the cover.


The addressable manual fire alarm box’s address shall be programmed with the use of a portable programming accessory. The programming accessory shall be a Cerberus Pyrotronics FPI-32 Programmer/Tester. The addressable manual fire alarm box’s address shall be set by electronic means only. No mechanical means such as programming pins, dip switches or rotary dials shall be required to set the device’s address.
Notes:
  • If the device is connected to a ground electrical box, the shields should be wired through and not connected to ground. The earth ground terminal of the device should be tied to the electrical box.
  • If shielded cable is used in grounded metallic raceway, tie the shield through and tie the earth ground terminal to the electrical box/raceway.
  • If the device is connected to a non-grounded electrical box tie the shields to the earth ground terminal.
  • If shielded cable is used without raceway or in nonmetallic raceway tie the shields to the earth ground terminal.

This MCP are compatible with the CERBERUS PYROTRONICS series Addressable panel & Commissioning done by authorized System Integrator.



5.     : CONTEXT PLUS
The Context Plus XP95 Manual Call Point is intended for indoor applications and incorporates a short circuit isolator which will ensure its operation in the event of a short circuit fault on the loop. The Call Point is surface mountable and has an easily resettable element rather than a break glass. It also features a unique ‘Plug and Play’ installation concept designed specifically to reduce installation time. The call point utilises a terminal block, where all installation cabling is terminated.

Its address is set at the commissioning stage by means of a seven-segment DIL switch. A single bi-coloured alarm LED is provided which is controlled independently of the call point by the control panel. The LED is illuminated red when the call point has been activated and amber/yellow to indicate a short circuit. Once activated, the Call Point can be reset by inserting the test key into the bottom of the unit until the key clicks into position, next remove the test key and push the front cover up until it clicks home.

This MCP are compatible with the CONTEXT PLUS series Addressable panel & Commissioning done by any System Integrator.


6.     : COOPER
Two versions of intelligent addressable callpoints are available in this range, the (CBG370S) which can be either surface or flush mounted and the (CBG370WP) which is a weatherproof version. MCP with Integral short circuit isolator & Soft addressed.
Installation:
1. Surface callpoint has standard rear BESA fixing facilities. In addition, back box can
Accept top or bottom surface entry cables. Surface callpoint can also be flush mounted.
2. Call point has test facility via special test key to prevent unauthorized operation.
3. Insertion of test key for test purposes and for cover removal is at bottom of callpoint to facilitate ease of access when mounted next to door architrave.
4. Test key is dual function, used to test callpoint operation by simulating activation and also to allow removal of clip on cover to gain access to element.
5. Element is held in place by clip on self-locking cover which can only be removed by use of a special tool (callpoint test key).
6. Separate loop in and loop out terminals are provided for all connections including screen continuity on intelligent addressable callpoint.

Both the (CBG370S) and the (CBG370WP) are compatible with the Cooper range of
Intelligent addressable fire systems & Commissioning done by any System Integrator.


           7.    : EST (by UTC)
The SIGA-270 and SIGA-278 series Manual Pull Stations are part of GE Security’s Signature Series system. Intelligent device with integral microprocessor & station’s terminal block accepts #18 AWG (0.75mm2) to #12 AWG (2.5mm2) wire sizes.
 Permanently stores programmable address, serial number, type of device, and job number. Automatically updates historic information including hours of operation, last maintenance date, number of alarms and troubles, and time and date of last alarm. Status LEDs; flashing GREEN shows normal polling; flashing RED shows alarm state.
Signature Series manual stations are compatible only with GE Security’s Signature Loop Controller. Only Quick Start & iO500 Panel can be commissioned by any System Integrator.

8: ESSER (by Honeywell)
ESSER Manual Call Station Suitable for esser-bus and powered loop connection, with soft address coding, alarm latch and alarm indicator (red LED and yellow actuation indicator). Conventional detectors can be connected to input of the MCP. Without BUS communication, the detector operates as conventional MCP. Supports easy reset after an alarm has been triggered without having to replace the broken element (glass pane).Detector housing is included. Built in isolators maintaining loop integrity. Terminal block accepts #26-14 AWG (2.5mm2) max size.
Manual stations are compatible only with Honeywell ESSAR Loop bus Controller. Panel can be commissioned by only authorized System Integrator.


9: FIRELITE (by Honeywell)
Dual Action BG-12, 12L, 12LSP, 12LX manual pull stations provide a textured finger-hold area that includes Braille text. In addition to PUSH IN and PULL DOWN text, there are arrows indicating how to operate the station, provided for non-English-speaking people.
Pushing in and then pulling down on the handle activates the normally-open alarm switch. Once latched in the down position, the word “ACTIVATED” appears at the top in bright yellow, with a portion of the handle protruding at the bottom as a visible flag.
Resetting the station is simple: insert the key, twist one quarterturn, then open the station’s front cover, causing the springloaded operation handle to return to its original position. The alarm switch can then be reset to its normal (non-alarm) position
manually (by hand) or by closing the station’s front cover, which automatically resets the switch. Closing the door automatically resets the switch to the ‘Normal’ position.
Opening the door will not activate or deactivate the alarm switch.

Manual call point compatible with the Honeywell – Firelite Range of addressable fire system & Commissioning done by any System Integrator.

10: GST (by UTC)
The DI-9204 constructed of high impact red ABS with a modern pleasing appearance. The terminating back box enables first fix installation and termination leaving the fascia with integral electronics to be simply plugged into base at the time of commissioning. Non breakable glass that can be reset with the GST standard reset key.
The DI-9202 operated via a micro-switch that when pressed a signal will be transmitted to the panel. Contains integral LED indicator to confirm operation. Connect the wires to the required terminal according to the wiring diagram. The Z1, Z2 is for addressable Loop, non-polarized. The cable must be fire rated type and the size depends on the distance and application. Recommended cable size 1.5mm² fire rated min 2
Hours.
Electronic addressing can be done through Handheld Programming device (P-9910B), purchased separately. Connect the two wires of the handheld programmer to Z1 and Z2 terminals of the manual call point (DI-9204).
The alarming mode of this MCP is by pressing, self-locked by mechanical structure to
reduce possibility of mis -triggering alarm. The built-in SCM can execute alarm checking and communication with the controller. The SCM contains an EEPROM to store messages like address code and device type. The address code can be modified in field by P-9910 Hand Held Programmer.
Compatible with all GST Fire Alarms Panels GST 100, GST 200/2 Series and GST IFP8 Range of addressable fire system & Commissioning done by any System Integrator.

11: HOCHIKI
The HCP-E incorporates a red LED mounted on the front cover, which can be selected as pulsing/non-pulsing for communications polling and is continuously lit when the HCP-E is operated. The unit is operated by pressing the EN54 compliant non-frangible (plastic) element and, once operated, produces a high level ESP interrupt, allowing the control panel to respond very quickly. A built in test function initiated by the control panel ensures the integrity of the device at all times and the device can be tested by insertion of a test key in the underside of the unit. Two terminal blocks are provided for easy connection to the loop wiring.
The unit is addressed using the TCH-B100 Hand Held Programmer for quick and reliable addressing and the unit can also be flush mounted if required.
Ensure that each device has a unique address set before operation. Note the address can be set before or after connection to the loop but the loop MUST NOT be powered. The address is set by connecting a hand held programmer (TCH-B100) to the programming connector on the reverse of the call point (top left corner) using a PL-3 programming lead. Plug the square connector of the PL-3 on to the programming connector on the call point, note the connector is NOT polarized. Set the address in the usual way. Once the address is stored remove the programming lead.
Fully compatible with Hochiki’ s ESP analogue addressable protocol. System Commissioning done by authorized System Integrator.

12: HONEYWELL
The XLS-278 Manual Pull Station is a double-action, single-stage fire alarm manual pull station with positive pull-lever operation. Lift the protective cover and one pull on the station handle breaks the glass rod and turns in a positive alarm, ensuring protection plus simple operation. The up-front highly visible glass rod and cover discourage tampering. The Station has a contemporary style made from durable red colored lexan with raised white lettering. The electronically coded serial number and address enable controllers on the same circuit to automatically map the location of the station. Each XLS-278 Manual Pull Station contains its own microprocessor to provide on-site analysis of operation for immediate alarm detection and response. Continuous self-checks track device operation and maintain a history of device conditions. The microprocessor stores the results of the self-check in a history log in the station’s permanent, non-volatile memory. Some or all of this information can be printed for review from the control panel of a PC laptop interface, or the SIGA-PRO Signature Series Service Tool.
The fire alarm station’s terminal block accepts 18 AWG (0.75 sq mm), 16 AWG (1.0 sq mm), 14 AWG (1.5 sq mm) and 12 AWG (2.5 sq mm) wire sizes.
Fully compatible with XLS100, XLS200 and XLS1000 Signature Loop Analogue addressable protocol. System Commissioning done by authorized System Integrator.

13: MORLEY IAS (by Honeywell)
The MI-MCP SERIES is designed to be used as a component of a compatible fire control system using Morley IAS analogue addressable devices. It is a dedicated addressable callpoint for installation on the two wire communication circuit providing
both signaling of alarm to the monitoring control panel and local led indication of activation. The MI-MCP may be installed as either a flush or surface mounted device in a normal internal environment.
The call point uses one of 99 possible addresses which is simply ‘dialled in’ using the two rotary decade switches on the rear of the unit. A specialist test key may be inserted into the bottom of the unit to lower the glass and release the micro-switch and thus
a full functional test is achieved.
Fully compatible with MORLEY IAS series loop Analogue addressable protocol. System Commissioning done by any System Integrator.

14: NOHMI
The FMM01U series are die-cast metal fire alarm pull stations available in either single or dual action configuration with Single Pole Single Throw (SPST) contacts. Also either lead wire or terminal strip connection is available in the series. The normally-open contact, which closes when the pull station is activated, is rated for 1A, 30VDC. The contacts are gold plated to avoid the risk of corrosion. The FMM01U series station can be reset by dedicated key after activation.
The FMM01U series are operated by pulling the handle on the front of the station as far down as it will go, at which point the handle locks into place and is easily visible from up to 50 feet. The handle is reset by opening the station with the key, placing the handle in the normal upright position and re-locking the station. On the dual action modules, the push rod rotates inward allowing the pull handle to be grasped in one handed motion.
Fully compatible with NOHMI series loop Analogue addressable protocol. System Commissioning done by authorized System Integrator.

15: Notifier (by Honeywell)
The NOTIFIER NBG-12LX is a state-of-the-art, dual-action (i.e., requires two motions to activate the station) pull station that includes an addressable interface for any NOTIFIER intelligent control panel. Because the NBG-12LX is addressable, the control panel can display the exact location of the activated manual station. This leads fire personnel quickly to the location of the alarm. Built-in bicolor LED, which is visible through the handle of the station, flashes in normal operation and latches steady red when in alarm. Handle latches in down position and the word “ACTIVATED” appears to clearly indicate the station has been operated. Up to 99 NBG-12LX stations per loop on classic protocol systems. Up to 159 NBG-12LX stations per loop on FlashScan® protocol systems.
Fully compatible with Notifier series loop Analogue addressable protocol. System Commissioning done by authorized System Integrator.

16: RAVEL
The RE-717M Manual Call Point is compliant with latest standards and is designed to interface with Ravel make addressable fire alarm panel, Avani.DIP switches are provided for addressing of the call point. The RED blinking LED indicates normal operating condition. Activation of MCP is indicated by RED steady LED, and also a visible YELLOW-BLACK strip. Module Addressing by 8 way DIP Switches.
Fully compatible with Ravel series loop Analogue addressable protocol. System Commissioning done by authorized System Integrator.

17: Schrack
The manual callpoints MCP 545 are suitable for the connection to the loop technology of the Schrack fire alarm panels BMZ Integral and Integral C. The four different versions differ only from the shape of the housing (IP pro-tection). Electronics, connection and function are the same for all types. The detectors contain a short circuit isolator and a red alarm LED. An alarm is released directly when the glass pane is broken. The alarm condition remains active, until the glass pane is replaced by a new one. A test

key is available for function test.
Fully compatible with Schrack Seconet series loop Analogue addressable protocol. System Commissioning done by only authorized System Integrator.

18: SECUTRON
The MCP5A Intelligent Call Point is designed to be used with Secutron's Intelligent Fire Alarm Control Panels. It is a dedicated addressable callpoint for installation on a two wire communication circuit providing both signalling of alarm to the monitoring control panel and local LED indication of activation. Set the call point address according to the designated project drawings, using a flat bladed screwdriver to turn the rotary address switches to the allocated number between 01-99.
Fully compatible with Secutron series loop Analogue addressable protocol. System Commissioning done by only authorized System Integrator.

19: Silent Knight
The SD500-PS and SD500-PSDA are a single action or dual action addressable manual fire alarm pull station for use with Silent Knight's IntelliKnight fire control panel. Extremely easy to operate, the SD500-PS/PSDA provides a fast and practical means of manually initiating a fire alarm signal. The SD500-PS/PSDA single action pull stations are operated by a pull on the front pull cover of the station. A plunger switch, wired to a self contained addressable module, is released as the pull station opens to initiate the alarm. Once operated, the cover hangs down and can be seen up to 100 feet away. The pull station is reset by returning the front cover to the normal upright position and relocking the station with a reset key. The reset keys are the same keys used on Silent Knight enclosures.
The SD500-PS/PSDA includes a status LED which blinks, indicating that the addressable module is communicating with the loop. The status LED lights continuously during an alarm. A dip switch on the addressable module is used to set the unique address.
Fully compatible with Silent Knight series loop Analogue addressable protocol. System Commissioning done by only authorized System Integrator.

20: SIMPLEX (By TYCO)
The Simplex addressable manual station combines the familiar Simplex manual station housing with a compact communication module that is easily installed to satisfy demanding applications. Its integral individual addressable module (IAM) constantly monitors status and communicates changes to the connected control panel via IDNet or MAPNET II communications wiring.

 Activation of the manual station requires a firm downward pull to activate the alarm switch. Completing the action breaks an internal plastic break-rod (visible below the pull lever, use is optional). The use of a break-rod can be a deterrent to vandalism without interfering with the minimum pull requirements needed for easy activation. The pull lever latches into the alarm position and remains extended out of the housing to provide a visible indication.
Model Series 4008, 4010, 4100U, 4020, 4100 and 4120 fire alarm control panels equipped with IDNet communications. Model Series 4100ES, 4100U, 4010ES, 4010, 4008, 4020, 4100, and 4120 fire alarm control panels equipped with either IDNet or MAPNET II communications. System Commissioning done by only authorized System Integrator.

21: SUMMIT SYSTEMS TECHNOLOGIES
The SPS-201ID Single Action Intelligent Manual Station is operated by pulling down the handle marked “PULL HANDLE” on the front of the station. The SPS-202ID Dual Action Intelligent Manual Station is operated by pushing the bar labelled “PUSH BAR” and then pulling down the handle marked “PULL HANDLE”. The SPS-200ID Series Manual Stations are reset by opening the station with the key, placing the handle in the normal upright position and re-locking the station.
Fully compatible with Summit system series loop Analogue addressable protocol. System Commissioning done by only authorized System Integrator.

22: Tyco
The CP820 Addressable surface mounting Manual Call Point has a plastic coated frangible element to ensure safe and reliable operation, producing no dangerous glass shards. The CP820 is operated by simply pressing on the centre of the frangible element until it snaps. A hammer, or other impact device, is not required. The snapped frangible element releases a microswitch, which signals an alarm to the Tyco MX Control and Indicating Equipment (CIE). The integral LED indicator will illuminate when an alarm is registered and may also be programmed to blink when the CP820 is polled by the CIE.
The CP820 is shipped with a default (invalid) address of 255 and must be programmed to the correct loop address using the MX Service Tool. The Service Tool is connected to the CP820 at the programming port.

Fully compatible with Tyco MX series loop Analogue addressable protocol. System Commissioning done by only authorized System Integrator.

23: Ziton
ZP785-3 callpoints are designed for semi recessed fixing, using a standard single gang socket box, or can be surface mounted by means of a Z-CPSB-1 matching plastic back box. Push in terminals enable the device to be plugged directly into the loop, making replacement simple and reducing internal cable ends to a minimum.
System testing, glass replacement and reset are carried out by using a special maintenance tool enabling part of the front mouding including the glass, to be lowered, allowing the device to operate.
Fully compatible with Ziton series loop Analogue addressable protocol. System Commissioning done by only authorized System Integrator.

Manual Call station installation and operating Instructions:
“Operation—To activate a single-action pull station, simply pull down the handle. To activate dual-action stations, push in, then pull down the handle.” Notice that the instructions make repeated reference to pulling down the handle. This manufacturer offers two styles of manual fire alarm boxes, single-action and double-action, and provides the operating instructions for each. Owner representatives or service technicians in the field who believe that they may test the manual fire alarm box by using a key—whether an actual key or Allen wrench—without actually pulling down the handle as described above must understand that such action does not constitute a code-compliant test.

Selection types of MCP:
·      MCP can be break - glass type, When struck by the operator, the glass shall be designed to prevent injury.
·         Or otherwise, Key operated the type
·         The call point shall return to its normal condition when the frangible element is replaced.
·        Call point operation shall cause the Fire and Gas control panel to detect a change in the loop current.
·      The manual call points for hazardous areas shall include encapsulated changeover contacts use with IS monitoring circuits.
Uses of MCP:
·        Manual call points are used for manual fire alarm activation and manual extinguisher control.
·    Public buildings, senior citizens’ homes, industrial premises, power stations, airports, train stations, office blocks, events centres, etc.
·    People often detect incipient fires faster than automatic fire detectors. These devices are disabled outside working hours (day/night mode). Manual activation of the alarm