SIMULTANEOUS (DUAL CHANNEL) AUDIO RELAY BOARD, 562-508
JP3
JP7
JP6
The simultaneous, or dual channel, audio relay board is designed to be used in 2120 dual channel audio
applications. Relays Kl and K3 on the board are used to switch between the two audio channels; relays K2 and
K4 are used to control two external speaker circuits. Relay K2 or K4 can be selected as supervised or
unsupervised via jumper wires as described below (use the illustration above as a reference).
TO SUPERVISE
INSTALL JUMPERS
K2 JP3, JP4
K4
JP7, JP8
Remove the jumpers for unsupervised relays.
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