INSTALLATION
AND
MAINTENANCE
INSTRUCTIONS
M502MA Two-wire Conventional
Detector Interface Module
6581 Kitimat Rd., Unit #6, Mississauga, Ontario, L5N 3T5
1-800-SENSOR2, FAX: 905-812-0771
www.systemsensor.ca
Specifications
Temperature:
32° to 120° F (0° to 49° C)
Humidity:
10% to 93% Noncondensing
Weight:
.5 lbs (232 g)
Dimensions:
41/2" H, 4" W, 11/4" D (Mounts to 4" square by 21/8" deep electrical boxes.)
Test Features:
Magnetically activated reed switch.
Accessories:
SMB500
Surface Mount Box for 500 series modules
M02-04-00
Test Magnet for testing devices
Communication Line – Terminals 1 & 2
Voltage:
15 – 32 VDC
Current:
200 µA Max @ 24 VDC, no communication
1.3 mA Max (Style D enabled)
5.1 mA Max 24V (LED latched on)
Loop Impedance:
40 Ω Max
External Power Supply Requirements – Terminals 3 & 4
Voltage:
17.6 – 28.2 VDC (filtered, regulated, and power-limited)
Ripple:
100mV RMS Max
Current:
92 mA per module
(Power must be interrupted to reset detectors. The interface module must have a minimum of 15 VDC at terminals 3 and
4 to function properly. Ground fault detection must be accomplished by the control panel.)
Initiating Device Circuit (IDC) – Terminals 6, 7, 8, & 9
Voltage:
12.5 to 30.3 VDC (Ripple: 100mV RMS Max)
Current:
92 mA Max
IDC Loop Impedance:
25 Ω Max
Standby Current:
10 mA Max @ maximum IDC voltage
Detector Current in Standby:
Up to 2.4 mA
Alarm Current:
20 mA minimum
Style:
Style B (class B) / Style D (class A)
EOL Resistance:
3.9K ohm nominal
(Detector loop current is sufficient to ensure operation of one alarmed detector per zone.)
Before Installing
This information is included as a quick reference installation guide. Refer to the appropriate installation manual
for detailed system information. If the modules will be
installed in an existing operational system, inform the
operator and local authority that the system will be temporarily out of service. Disconnect power to the control panel
before installing the modules.
NOTICE: This manual should be left with the owner/user
of this equipment.
General Description
The M502MA Interface Module allows intelligent panels to
interface and monitor two-wire conventional smoke detectors. All two-wire detectors being monitored must be ULC
D500-19-00
REV: 003
compatible with the module.
The module is addressed through the communication line
of intelligent systems. When the module is interrogated, it
transmits the status of one zone of two-wire detectors to
an intelligent control panel. Status conditions are reported
as normal, open, or alarm. The interface module supervises the zone of detectors and the connection of an external
power supply.
Two rotary decade switches allow setting module addresses from 00–99. A status LED indicator is provided
and is controlled by code command from the control panel.
The module provides a magnetically activated test switch
for testing the module’s electronics and connections to the
control panel (see Figure 1).
I56-1051-000
Compatibility Requirements
To insure proper operation, this module shall be connected
to compatible intelligent ULC listed control panels only.
Conventional two-wire smoke detectors must be ULC
compatible with the interface module.
Figure 1. Module controls and indicators:
Package Contents
The interface module includes the following items:
(1) Two-wire interface module
(1) 3.9K ohm end-of-line resistor (A2143-10)
(1) Off-white cover plate
(1) Screw pack for cover plate
Mounting
The M502MA Interface Module mounts directly to 4 inch
square electrical boxes as shown in Figure 2. The box
must have a minimum depth of 2-1/8 inches.
Wiring
NOTE: All wiring must conform to applicable local codes,
ordinances and regulations. When using control
modules in nonpower limited applications, the System Sensor CB500 Module Barrier must be used
to meet ULC and/or NBC requirements for the
separation of power-limited and nonpower-limited
terminals and wiring. The barrier must be inserted
in a 4"x4"x21 /8" junction box, and the control module must be placed into the barrier and attached
to the junction box (Figure 2A). The power-limited
wiring must be placed into the isolated quadrant of
the module barrier (Figure 2B).
STATUS LED
3
2
1
4 5
0
9
6 3
7 2
8 1
4 5
0
9
6
7
8
ROTARY DECADE
ADDRESS SWITCHES
MAGNET TEST
POSITION
A78-2318-00
Figure 2A. Mounting module with barrier:
1.Install module wiring in accordance with the job drawings and appropriate wiring diagrams (Figures 3 – 5).
2.Set the address on the module per job drawings.
3.Secure module to electrical box (supplied by installer),
as shown in Figure 2A.
Testing
The M502MA Interface Module can be tested with a test
magnet available from System Sensor (M02-04-01- see
Figure 1). The magnet test checks the module’s electronics and connections to the control panel. Interfaced
two-wire detectors must be tested independently. Test twowire detectors per manufacturer’s installation instructions.
A78-2610-00
Figure 2B:
ISOLATED�
QUADRANT
A78-2611-00
D500-19-00
REV: 003
I56-1051-000
M502MA Interface Module Wiring Diagrams
Figure 3. Interface two-wire conventional detectors, NFPA Style B:
COMMUNICATION LINE
32 VDC MAX.
TWISTED PAIR
IS RECOMMENDED
CONNECT MODULES TO LISTED
COMPATIBLE CONTROL
PANELS ONLY.
FROM PANEL OR
PREVIOUS DEVICE
(-)
(+)
(-)
(+)
TERMINAL WIRING MUST BE POWER LIMITED.
TO NEXT
DEVICE
2-WIRE CONVENTIONAL DETECTOR
INITIATING DEVICE CIRCUIT (IDC) - NFPA STYLE B
POWER LIMITED: 92ma MAX; 30.3 VDC MAX
IDC INSTALLATION WIRING MUST NOT EXCEED
25 OHMS, 12 - 18 AWG.
DO NOT MIX FIRE ALARM INITIATING, SUPERVISORY,
OR SECURITY DEVICES ON THE SAME MODULE.
MRI-M502M
INTERFACE
MODULE
(-) 9
(-)
(+)
(-)
LISTED BATTERY-BACKUP SWITCHED
DC POWER SUPPLY.
SEE REQUIREMENTS ON PAGE 3.
(+)
1 (-)
(+) 8
2 (+)
(+) 7
3 (-)
(-) 6
4 (+)
5
POWER TO THE INTERFACE MODULE
MUST BE EXTERNALLY SWITCHED TO
RESET THE DETECTORS.
AN MRI-M500CH
+
+
-
-
3.9K EOL
RESISTOR
(INCLUDED)
CONTROL MODULE CAN BE USED TO
SWITCH POWER FROM A STANDARD
POWER SUPPLY - SEE FIGURE 5.
DO NOT LOOP WIRE UNDER TERMINALS. BREAK WIRE
RUN TO PROVIDE SUPERVISION OF CONNECTIONS.
DETECTORS MUST BE UL LISTED COMPATIBLE WITH MODULE.
INSTALL DETECTORS PER MANUFACTURER'S
INSTALLATION INSTRUCTIONS.
OPTIONAL BRANCH CIRCUIT
TO NEXT INTERFACE MODULE.
MODULE SUPERVISES SUPPLY
VOLTAGE AND DETECTOR LOOP.
A78-2394-06
Figure 4. Interface two-wire conventional detectors, NFPA Style D:
CONNECT MODULES TO LISTED
COMPATIBLE CONTROL
PANELS ONLY.
FROM PANEL OR
PREVIOUS DEVICE
COMMUNICATION LINE
32 VDC MAX.
TWISTED PAIR
IS RECOMMENDED
(-)
(-)
(+)
(+)
TERMINAL WIRING MUST BE POWER LIMITED.
TO NEXT
DEVICE
2-WIRE CONVENTIONAL DETECTOR
INITIATING DEVICE CIRCUIT (IDC) - NFPA STYLE D
POWER LIMITED: 92ma MAX; 30.3 VDC MAX
IDC INSTALLATION WIRING MUST NOT EXCEED
25 OHMS, 12 - 18 AWG.
DO NOT MIX FIRE ALARM INITIATING, SUPERVISORY,
OR SECURITY DEVICES ON THE SAME MODULE.
MRI-M502M
INTERFACE
MODULE
(-)
(+)
LISTED BATTERY-BACKUP, SWITCHED
DC POWER SUPPLY.
SEE REQUIREMENTS ON PAGE 3.
(-)
(+)
(-) 9
1 (-)
(-) 8
2 (+)
(+) 7
3 (-)
(-) 6
4 (+)
5
POWER TO THE INTERFACE MODULE
MUST BE EXTERNALLY SWITCHED TO
RESET THE DETECTORS. AN MRI-M500CH
CONTROL MODULE CAN BE USED TO
SWITCH POWER FROM A STANDARD
POWER SUPPLY - SEE FIGURE 5.
OPTIONAL BRANCH CIRCUIT
TO NEXT INTERFACE MODULE.
MODULE SUPERVISES SUPPLY
VOLTAGE AND DETECTOR LOOP.
D500-19-00
REV: 003
3
3.9K EOL RESISTOR
REQUIRED AT TERMINALS
8 & 9 (INCLUDED)
+
+
-
-
DO NOT LOOP WIRE UNDER TERMINALS. BREAK WIRE
RUN TO PROVIDE SUPERVISION OF CONNECTIONS.
DETECTORS MUST BE UL LISTED COMPATIBLE WITH MODULE.
INSTALL DETECTORS PER MANUFACTURER'S
INSTALLATION INSTRUCTIONS.
A78-2395-07
I56-1051-000
Figure 5. M500C series control module switching a power supply (controls switched 24 VDC external power to
M502MA)
FROM PANEL OR
PREVIOUS DEVICE
TERMINAL WIRING MUST BE POWER LIMITED
COMMUNICATION LINE
32 VDC MAX.
TWISTED PAIR
IS RECOMMENDED
CONNECT MODULES TO LISTED
COMPATIBLE CONTROL
PANELS ONLY.
(–)
(–)
(+)
(+)
TO NEXT
DEVICE
CONTROL
MODULE
M500C
9
(–)
1 (–)
(+)
RELAY CONTACT RATINGS:
RESISTIVE:
2 A @ 30 VDC
INDUCTIVE:
1 A @ 30 VDC (.6 PF)
PILOT DUTY:
.6 A @ 30 VDC (.35 PF)
.3 A @ 110 VDC (.35 PF)
.3 A @ 120 VAC (.35 PF)
CONTACTS ARE SHOWN IN STANDBY.
CONTACTS MAY HAVE SHIFTED TO ALARM
DURING SHIPPING. DO NOT APPLY
POWER TO THE CIRCUITS THE MODULE
CONTROLS UNTIL THE MODULE IS
CONNECTED TO AND ACCEPTED BY THE PANEL.
8
2 (+)
7
3
6
4
5
(+)
(–)
J1 & J2
BREAK TABS J1 & J2
TO ENABLE FORM 'C' MODE
DC POWER SUPPLY, LISTED FOR FIRE
PROTECTION WITH BATTERY BACKUP
(MONITOR LOSS OF INPUT POWER)
SEE REQUIREMENTS ON PAGE 3
SWITCHED RISER
CIRCUIT FOR
INTERFACE MODULES
M500C CONTROL
MODULE IS NOT REQUIRED
IF SWITCHABLE POWER
IS AVAILABLE.
(+)
(–)
A78-2396-06
Three-Year Limited Warranty
System Sensor warrants its enclosed module to be free from defects in materials
Please include a note describing the malfunction and suspected cause of failure.
and workmanship under normal use and service for a period of three years from
The Company shall not be obligated to repair or replace units which are found to
date of manufacture. System Sensor makes no other express warranty for this
be defective because of damage, unreasonable use, modifications, or alterations
smoke detector. No agent, representative, dealer, or employee of the Company has
occurring after the date of manufacture. In no case shall the Company be liable for
the authority to increase or alter the obligations or limitations of this Warranty. The
any consequential or incidental damages for breach of this or any other Warranty,
Company’s obligation of this Warranty shall be limited to the repair or replacement
expressed or implied whatsoever, even if the loss or damage is caused by the Com-
of any part of the smoke detector which is found to be defective in materials or work-
pany’s negligence or fault. Some legislations do not allow the exclusion or limitation
manship under normal use and service during the three year period commencing
of incidental or consequential damages, so the above limitation or exclusion may
with the date of manufacture. After phoning System Sensor’s toll free number 1-
not apply to you. This Warranty gives you specific legal rights, and you may also
800-SENSOR2 (736-7672) for a Return Authorization number, send defective units
have other rights under common law.
postage prepaid to: System Sensor, Repair Department,
RA #__________, 6581 Kitimat Rd., Unit #6, Mississauga, Ontario, L5N 3T5.
D500-19-00
REV: 003
4
I56-1051-000
© System Sensor 1997