10
The trouble output is a normally open contact coupled with a supervision resistor that allows the
panel to signal when a DFSM trouble conditions occurs. The contact is wired to a supervised
IAM, located on the back of the key switch, that can sense contact closure.
1. Set the IDNet address for the IAM as described in 574-331.
2. Wire the trouble output (TB2) to the IAM as shown in the figure below. Leave the 6.8K EOL
on TB2.
3. Mount the IAM to the mounting bracket on the master or slave card. The IAM snaps into the
bracket.
Figure 7. Wiring from IAM to Trouble Output
Connect the key switch to TB3 as shown in the figure below. Mount the switch in a readily
accessible area near the microphone.
TB3
+
-
Figure 8. Key Switch Wiring
1. If connected, unplug the Master Microphone from the audio controller’s Local Speaker/Mic
Port (P5 on the Analog Audio Controller and P1 on the Digital Audio Controller).
2. Connect harness 733-953 between P5 of DFSM master and the Local Speaker/Mic Port of the
audio controller.
Continued on next page
Wiring,
Continued
Wiring Master/Slave
Trouble Output
Master Key Switch
Wiring
Master Microphone
Harness Installation
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