System Sensor MOD2W User Manual
INSTALLATION AND MAINTENANCE INSTRUCTIONS
I56-4001-000
i3 Series Loop Test/Maintenance Module
MOD2W
*For use with 2-Wire i3 series smoke detectors 2W-B, 2WT-B, and (one) 2WTR-B
SPECIFICATIONS
Electrical Specifications
Power Supply Voltage: Resettable power; Min. 8.5 Volts DC (Power limited); Max. 35 Volts DC (Power limited);
Device Power-up Time: 200 milliseconds
Max. Standby Current: 60mA
Max. Alarm Current: 185mA
Nom. Standby Current: 38mA@12V, 20mA@24V
Alarm Contact Rating: 100 mA @ 36 Volts DC, resistive, 25 ohms
Maintenance Contact Rating: 100 mA @ 36 Volts DC, resistive, 25 ohms
Max. IDC Loop Wiring Resistance: 50 Ohms
Min. Reset Time: 300 milliseconds
Initial Communication Cycle: 6 minutes
EZ Walk Test Availability: 6 minutes after power up or panel reset
Physical Specifications
Operating Temperature Range: 0 - 50° C (32 - 122° F)
Operating Humidity Range: 5 - 95% RH
Storage Temperature Range: -20 - 70° C (-4 - 158° F)
Height: 6.04 inches
Width: 6.04 inches
Depth: 1.16 inches
Shipping Weight: 0.6 lbs
Wire Gauge Acceptance: Min: 22 AWG; Max: 14 AWG
2-wire Compatibility Requirements
Min. Loop Voltage: 12.6 Volts DC
Max. Loop Voltage: 14.52 Volts DC
Max. Loop Resistance: 50 Ohms
Max. Loop Ripple: 240 mVpp
Max. Loading Capacitance: 0.01 mF
Max. Alarm Current: 43.5 mA
Max. Reset Voltage: 0.30 Volts DC
Alarm Delay: n/a
Min. Alarm Reset Time: 0.3 seconds
Max. Normal Load Current: 1.2 mA
Zone Type: Standard
EOL Device: 3.9k Ohms (+-5%)
Loop Style: B and D
Compatibility Zone Identifier: A
Detector Zone Identifier: A
Max. Detectors Per Zone: (12) 2-wire i3 series model #2W-B, 2WT-B, (one) 2WTR-B
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6583
www.systemsensor.com
BEFORE INSTALLATION
This information is included as a quick reference installation guide. Refer to
the control panel installation manual for detailed system information. If the
module 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 module.
Notice: This manual should be left with the owner/user of this equipment.
This product is intended for use in ordinary indoor locations.
GENERAL DESCRIPTION
The MOD2W allows a control panel to receive a “need for maintenance” signal from two–wire i3 series smoke detectors, model numbers 2W–B, 2WT–B
and one 2WTR-B. The module uses a form C zone relay to initiate “out of sensitivity” and “freeze trouble”, a form A zone alarm relay and a second form
A zone relay to indicate loop fault. An EZ Walk Test puts all detectors on the
loop into a Walk Test mode for easy verification of detector loop wiring. The
module allows 2-wire smoke detectors to be used on any compatible 4-wire
control panel and provides Style D wiring on the detector loop.
VISIBLE ANNUNCIATON
The MOD2W has three visible LED’s: The green LED is a supervisory LED; it
blinks during power on, reset, and during normal operation. The yellow LED
SS-560-000 1 I56-4001-000
is used to indicate a loop wiring fault and will blink when it is in EZ Walk test
mode. The red LED signals smoke events; it blinks during smoke maintenance
events and lights constantly during smoke alarm events.
FIGURE 1: MODULE FRONT VIEW
Green LED
Yellow LED
Red LED
EZ Walk Test Switch
S0331-02
TABLE 1: OPERATION MODES
HOLE FOR MOUNTING
OPERATION MODE
Normal (standby) Blink 5 Sec. OFF OFF
No power/Non-operational OFF OFF OFF
Loop wiring fault Blink 5 Sec. ON OFF
EZ Walk Test Mode Blink 5 Sec. Blink 5 Sec. OFF
Alarm Smoke Blink 5 Sec. OFF ON
Maintenance Blink 5 Sec. OFF Blink 5 Sec.
Freeze Trouble Blink 5 Sec. OFF Blink 10 Sec.
GREEN
LED
YELLOW
LED
RED LED
NORMAL (STANDBY)
The module is powered and detectors on the loop are operating normally.
NO POWER/NON-OPERATIONAL
Power is not applied to the module or communication between the module
and the detectors on the loop is unsuccessful.
LOOP WIRING FAULT
If an open circuit occurs on the loop, the module will indicate the condition
by illuminating the yellow LED. 2-wire units will then power the style-D terminals. When the wiring issue on the loop has been resolved, the module will
turn the yellow LED off.
EZ WALK TEST MODE
This indicates the module and detectors are in EZ Walk Test Mode. See “EZ Walk
Test” section for instructions on how to initiate and perform the EZ Walk test.
ALARM SMOKE
A smoke alarm will be indicated by the red LED.
A smoke alarm is not self-restoring. Once a smoke alarm has been signaled,
the red LED will illuminate until the module is reset by removal of power.
MAINTENANCE
This condition means one or more detectors on the loop have a smoke maintenance issue. See “Smoke Maintenance Inquiry” section for further details.
FREEZE TROUBLE
This condition means one or more detectors on the loop are measuring the
ambient temperature is near the freezing point. See “Freeze Trouble Inquiry”
section for further details.
INSTALLATION
MOUNTING
The module can be mounted to a 4-11/16 inch back box or inside a listed, dedi-
cated enclosure. When mounting inside an enclosure with pre-stamped holes,
it may be easier to align the bottom screw hole first. It is not necessary to use
the module cover when mounting inside an enclosure.
FIGURE 2: MOUNTING
TO VISTA ENCLOSURE
(No. 6x3/4 Type AB)
WIRING GUIDELINES
All wiring must be installed in compliance with the NFPA 70 standards, National Electrical Code, applicable state and local codes, and any special requirements at the local Authority Having Jurisdiction (AHJ).
The screw terminals in the mounting base will accept 14-22 gauge wire. Wire
connections are made by stripping approximately ¼” of insulation from the
end of the feed wire, inserting it into the proper base terminal, and tightening
the screw to secure the wire in place. Do not put wires more than 2 gauge
apart under the same clamping plate.
WARNING
Remove power from alarm control unit or initiating device circuits before installing detectors.
WIRING DIAGRAMS
Install module wiring in accordance with appropriate wiring diagrams.
(Figure 3)
The module relays have a maximum ON resistance of 25 ohms. This resistance plus the wiring resistance to the panel must be less than the maximum
zone wiring resistance stated in the panel manual.
NOTE: If 2–wire i3 detectors are used in conjunction with a style D initiating circuit, the MOD2W must be used to provide that capability. Ground
fault on a module’s 2-wire loop can be indicated at a control panel if the
control panel is capable of ground fault detection on the power supply to the
module and meets NFPA 72 ground fault indication requirements for initiating
device circuits. The installer must verify that capability.
TABLE 2: DIP SWITCH CONFIGURATIONS
DIP SWITCH # 1 DIP SWITCH # 2 DIP SWITCH # 3
ON
(DEFAULT)
OFF
Unused
Unused
Smoke Maint on
Smoke Trouble and
Form-B Maint Relay
Smoke Maint on
Form-B Smoke main-
tenance Relay only
Unused
Unused
POWER UP AND COMMUNICATIONS
COMMUNICATIONS CHECK
Upon power up, the module will send a request for communication check. All
compatible detectors on the loop that understand the communication protocol
will respond. If all detectors respond correctly, the green LED will blink once
every 5 seconds. If the module does not get a response, it will turn off the
green LED and continue to try every 2 minutes until a response is received.
SMOKE MAINTENANCE INQUIRY
The module sends a smoke maintenance inquiry to the detectors every 24
hours. If a response indicating a maintenance problem is received, the red
LED on the module will blink once every 5 seconds and a smoke maintenance
condition will be indicated to the panel. It is likely that the detector needs to
be cleaned or replaced, refer to the detector instruction manual for maintenance instructions.
FREEZE TROUBLE INQUIRY
The module sends a freeze trouble inquiry to the detectors every four hours. If
a response indicating a freeze problem is received, the red LED on the module
will blink once every 10 seconds and a smoke maintenance condition will be
indicated to the panel.
SLOT FOR MOUNTING
TO VISTA ENCLOSURE
(No. 6x5/16Type AB or Type F)
SLOTS FOR MOUNTING
TO 4-11/16 JUNCTION BOX
S0332-00
SS-560-000 2 I56-4001-000
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