System Sensor 2W-MOD2 - Manual

NOTE: If two–wire i3 detectors are used in conjunction
with a style D initiating circuit, the 2W–MOD2 must be
used to provide that capability. Ground fault on a mod-
ule’s two-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.
Figure 3. Module LED modes:
Power on. Detectors
on loop do not have
communication capability.
Power on. One or more
detectors on loop have
communication capability.
Power not applied or
module not operating
properly.
Detector on loop in alarm.
One or more detectors
out of sensitivity or in
Freeze Trouble.
Detectors on loop not
in alarm, maintenance
or Freeze Trouble.
Loop wiring fault.
EZ Walk Test mode.
Loop wiring normal.
ON
Blink 1 sec. ON
and 1 sec. OFF
OFF
ON
Blink 1 sec. ON
and 1 sec. OFF
OFF
ON
Blink 0.5 sec. ON
and 0.5 sec. OFF
OFF
GREEN LED
RED LED
YELLOW LED
LED COLOR STATUS CONDITION
The module has loop trouble restoration detection. If the
loop trouble (open loop) doesn’t exist any more, the mod-
ule will restore to standby condition with a maximum delay
of 1 minute. There is no delay in loop trouble detection.
If an alarm occurs while the module is indicating mainte-
nance, the alarm will supercede maintenance.
WARNING
If the green LED remains ON (no blinking) three minutes af-
ter applying power, it means that the module has determined
that no detector on its loop has communication capability.
In this condition, the detectors are still capable of initiating
alarm and loop trouble at the module. However, maintenance
and freeze trouble, will not be indicated at the module, and
EZ walk test will not be available. If i
3 detectors are installed
on the loop, verify wiring and system operation.
Before Installing
This information is included as a quick reference installa-
tion guide. Refer to the control panel installation manual
for detailed system information. If the modules will be in-
stalled in an existing operational system, inform the opera-
tor 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 shall be left with the owner/user of
this equipment.
General Description
The 2W-MOD2 allows a control panel to receive a “need for
maintenance” signal from two–wire i3 series smoke detec-
tors, model numbers 2W–B, 2WT–B, 2WTA–B, and 2WTR–B.
The module uses a form C zone relay to initiate “out of sen-
sitivity” and “freeze trouble”, a form A zone alarm relay and
a second form A zone relay to indicate loop fault (see Figure
1). An EZ Walk Test puts all detectors on the loop into a Walk
Test mode for easy verification of detector loop wiring.
Figure 1:
Condition Maintenance relay (form C) Alarm relay (form A) Loop trouble relay (form A)
Normal OFF Open Close
Loop trouble OFF Open Open
Maintenance/Freeze trouble ON Open Close
Loop trouble and ON Open Open
Maintenance/Freeze trouble
Alarm
OFF Close N/A
Alarm and loop trouble OFF Close N/A
Alarm and Maintenance/Freeze OFF Close N/A
trouble
Terminal Location
Terminal 7 – N.O. Relay connected Relay connected between
Terminal 8 – Common between terminals terminals 10 and 12
Terminal 9 – N.C. 10 and 11
S0236-00
Figure 2. Module front view:
Green LED
Red LED
Yellow LED
EZ Walk-Test
Pushbutton
S0218-00
Three LED’s on the module provide a local visual indica-
tion of the module status(es).
The maintenance module allows two-wire smoke detectors to
be used on any electrically compatible four-wire control panel.
D500-46-00 1 I56-2174-004
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
Loop Test/Maintenance Module
Model: 2W-MOD2
Series
I56-2174-004