The Alarm Board (AB1) is connected to the Watch Dog via a sub-D9 cable. It converts the WD1's open-collector signals into three 10-Amp SPDT and one 8-Amp DPDT relay outputs.

The Watch Dog is a truly versatile FM / AM / NOAA Weather receiver, real-time RDS decoder, and configurable alarm system. Designed with Broadcast Radio and 24x7x365 operation in mind, the Watch Dog...