Honeywell FS20X Series - Detector Connections

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FS20X Fire and Flame Detectors
Detector Connections
The electronics module has six-pin and ten-pin keyed, removable connectors with
female screw terminal plugs. These connect to the two respective male connectors
with analog, digital, and relay interfaces (see Figure 16). Use the ten-pin plug (J2)
and connector for relay configurations. For digital and analog configurations, use the
six-pin plug (J1) and connector.
J2 Connector J1 Connector
Pin Connection Pin Connection
1 Auxiliary NC 1 DC return
2 Auxiliary NO 2 RS-485-A
3 Auxiliary COM 3 RS-485-B
4 Alarm NC 4 +24 VDC
5 Alarm NO 5 4-20mA source
6 Alarm COM 6 4-20mA sink
7 Fault NO
8 Fault COM
9 +24 VDC
10 DC return
Figure 16. Electronics module, rear view (contacts shown with no power applied)
Do not open the electronics module as this will void all warranties.
N OT I C E
Avoid wire splices whenever possible. Good wiring practices simplify installation,
improve reliability, and facilitate maintenance. If wire splices are necessary, solder
and properly insulate them.