Detector Connections; Wiring And Terminal Connections - Honeywell FS20X Series User Manual

FS20X Fire and Flame Detectors

Detector Connections

The electronics module has six-pin and ten-pin, removable connectors with female screw terminal plugs�
These connect to the two respective male connectors with analog, digital, and relay interfaces (see
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
Pin Connection
1 Auxiliary NC
2 Auxiliary NO
3 Auxiliary COM
4 Alarm NC
5 Alarm NO
6 Alarm COM
7 Fault NO
8 Fault COM
9 +24 VDC
10 DC return
Figure 16� Electronics module, rear view (contacts shown with no power applied)
N OT I C E
Do not open the electronics module as this will void all warranties�
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�
Figure
J1 Connector
Pin Connection
1 DC return
2 RS-485-A
3 RS-485-B
4 +24 VDC
5 4-20mA source
6 4-20mA sink
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FS20X Fire and Flame Detectors

Wiring and Terminal Connections

Note 2
Figure 17� Typical wiring for 4-20 mA (sourcing) analog output
Note 2
Figure 18� Typical wiring for 4-20 mA (sinking) analog output
Notes:
1� The cable shield must be grounded at one end only, at the control panel�
2� Coil and tape the cable shield at the detector end�
3� Set rotary switch SW3 to position 1 for source current wiring (Figure 17) or to position 0 for sink
current wiring (Figure 18)�
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