Specifications

Field Wiring

Figure 10: Addressable Loop Wiring -Class A or Style 6

Loop Operation

When there is a short circuit on the Class A loop with isolators installed, the isolators isolate the shorted fault, the

panel detects it as an open loop and generates an open loop trouble.

When a Class A loop is opened there may be a few missing devices reported by the panel which will be restored

once the panel has established the Class A connection.

Note: When there is an "Open loop trouble" look for both open and shorts on the loop. As a guide line the

isolators which are activated in response to a short will have their LED ON; look for the short between the

two isolators with their LEDs ON.

CLASS A

WIRING

ION SMOKE

DETECTOR

PHOTO SMOKE

DETECTOR

HEAT DETECTOR

INPUT MODULE

Loop

+-+-

OUTPUT MODULE