
INSTALLATION AND MAINTENANCE INSTRUCTIONS
M902M Input Module
For Two-wire Conventional Detector
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.
The M902M Input Module allows intelligent panels to interface and monitor two-wire conventional smoke detectors.
The module address should be set by the model CP900M from 101to 199. 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.
A status LED indicator is provided and is controlled by code command from the control panel. (
).
Compatibility Requirements
To insure proper operation, this module shall be connected to
compatible intelligent control panels only. Conventional two-wire
smoke detectors must be compatible with the interface module. The
external power 24VDC which supplies the power to the detector must be
reset.
The input module includes the following items:
(1) Two-wire interface module
(1) 3.9K ohm end-of-line resistor
(1) Off-white cover plate
(1) Screw pack for cover plate
NOTE: All wiring must conform to applicable local codes, ordinances
and regulations. When using control modules in nonpower limited
applications, the CB500 Module Barrier must be used to meet the
requirements for the separation of power limited and nonpower-limited
terminals and wiring. The barrier must be inserted in a 100mmsquare by 50mm
deep electrical boxes, 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 barrie.
The M902M Input Module mounts directly to 100mm square electrical
boxes as shown in
A.The box must have a minimum depth of
50mm.
1. Install module wiring in accordance with the job drawings and
appropriate wiring diagrams (Figure 3.).
2. Set the address on the module per job drawings.
Figure 1. Input Module and Indicator
detailing Mounting Arrangement
Temperature: -10° C to 55° C (14°F to 131° F) External Power Supply Requirements-Terminals 3 & 4
Humidity: 5% to95%RH Noncondensing Voltage:18 to 29 VDC (filtered, regulated, and power-limited)
Weight: 0.2bs (92 g) Ripple: 100mV RMS Max
124.6mm L x 124.6mm W x62mm H (with the
mountingplate andthe junctionbox, seeFigure 2B ) Current:102 mA per module
Accessories: SMB500/W Surface Mount Box for 900 series
modules
(Power must be interrupted to reset detectors. The interface module
must have a minimum of 18 VDC at terminals 3 and 4 to function
properly. Ground fault detection must be accomplished by the
control panel.)
Communication Line-Terminals 1 & 2
Voltage: 15 – 32 VDC Loop Impedance: 40¡Max
Current: 850µA Max @ 24 VDC, no communication
1.8 mA Max 24V (LED latched on)
Initiating Device Circuit (IDC) – Terminals 5 & 6
Current: 102 mA Max Detector Current in Standby: Up to 2.4 mA
Standby Current: 12 mA Max @ maximum IDC voltage Style: Style B (class B)
IDC Loop Impedance: 25¡Max EOL Resistance: 3.9K ohm nominal
Alarm Current: 18 mA minimum
(Detector loop current is sufficient to ensure operation of one alarmed detector per zone.)
Figure 3. M902M Input Module Wiring Diagrams
with B401/B801 Base:
CONNECT MODULES TO LISTED
COMPATIBLE CONTROL
PANELS ONLY.
FROM PANEL OR
TERMINAL WIRING MUST BE
POWER LIMITED
IS RECOMMENDED
COMMUNICATION LINE
32 VDC MAX
TWISTED PAIR
RESISTOR
(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 MANUFACTURE’S
INSTALLATION INSTRUCTIONS.
OPTIONAL BRANCH CIRCUIT
TO NEXT INTERFACE MODULE
MODULE SUPERVISED SUPPLY
VOLTAGE AND DETECTOR LOOP.
POWER TO THE INTERFACE MODULE
MUST BE EXTERNALLY SWITCHED TO
RESET THE DETECTORS. A CONTROL CMX-7
MODULE CAN BE USSED TO SWITCH
POWER FROM A STANDARD POWER
SUPPLY.
18-29 VDC
2-WIRE CONVENTIONAL DETECTOR
INITIATING DEVICE CIRCUIT (IDC)-NFPA STYLE B
POWER LIMITED 102mA MAX:29VDC MAX
IDC INSTALLATION WIRING MUST NOT EXCEED
25 OHMS, 12-18AWG
DO NOT MIX FIRE ALARM INITIATING SUPERVISORY.
OR SECURITY DEVICES ON THE SAME MODULE
Three-Year Limited Warranty
Xi'an System Sensor warrants its enclosed products to be free from defects in materials and workmanship under normal use and service for a period
of three years from date of manufacture. The company’s obligation of this Warranty shall be limited to the repair or replacement of any art of the
product, which is found to be defective in materials or workmanship under normal use and service during the three year period commencing with the
date of manufacture.
The Company shall not be obligated to repair or replace units which are found to be defective because of damage, unreasonable use, modifications,
or alterations occurring after the date of manufacture.
Compatible Two-wire System Sensor Smoke Detectors for Use with M902M : A
3. Secure module to electrical box (supplied by installer), as shown in Figure 2A.
Standard: GB16806-2006 Certification:
Figure2A. Exploded View of Typical Module
Figure2B. Module Mounting Size:
Dimensions:
Detector
Model Detector
TypeBase
Model Max
Detector
JTY-LZ-881 Ionization DZ-B801 25
JTY-GD-882 Photoelectric DZ-B801 25
JTW-SD-885 Thermal DZ-B801 25
JTY-GD-2451 Photoelectric DZ-B401/B 20
JTY-LZ-1451 Ionization DZ-B401/B 20
JTW-BCD-5451 Thermal DZ-B401/B 20
JTY-LZ-1151 Ionization DZ-B401 20
JTY-GD-2151 Photoelectric DZ-B401 20
Product Nameplate Date Code Note:
XX X X
Stands for: The end number of the producing year the producing month the week of the month