2W-MOD2 SYSTEM SENSOR Two-wire loop test and maintenance module for use with i3 Series detectors

Detectors i3 Series of Sensor System

DESCRIPTION:
The 2W-MOD2 allows a control panel to receive a “need for
maintenance” signal from two–wire i3 series smoke detectors
model numbers 2W–B 2WT–B 2WTA–B and 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 (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            Alarm relay           Loop trouble 
                            relay (form C)             (form A)               relay (form A)  

Normal                        OFF                         Open                          Close

Loop trouble              OFF                         Open                          Open

Maintenance               ON                          Open                           Close
/Freeze trouble 

Loop trouble and       ON                          Open                           Open
Maintenance/Freeze
rouble

Alarm                          OFF                         Close                            N/A

Alarm and                   OFF                         Close                            N/A
loop trouble

Alarm and                   OFF                         Close                            N/A
Maintenance/Freeze
trouble

Terminal        Terminal 7 – N.O.        Relay connected        Relay connected 
Location        Terminal 8 – Comm   between terminals    between terminals 
                       Terminal 9 – N.C.                10 and 11                  10 and 12

• Allows to use the detectors of 2 wires of the i3™ series with any fire or intrusion of 2 or 4 wires
• Visual signal of maintenance
• Comes with a relay that changes the status when any detector i3 connected to the circuit iDC requires cleaning
• Comprehensive test integral to the circuit
• Indicating LED’s Green Red and Yellow 

2024-02-23 11:55:31

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