TDC Relay Board

The hard wired relay board, MTI part
#81093, provides for a hard wired
control system utilizing mechanical
relays. The relay board is equipped with
8 mechanical relays with form C contacts
provided on the output. The board
provides for 3 LED indicators per relay.
The LED indicators are provided with
diode protection and lamp test diodes.
In addition, the indicator circuits are
equipped with a dropping resistor in
order to eliminate the necessity for
dropping resistors on the faceplate. The
switch inputs to the circuit board provide
for an unlock group and lock position for
each circuit.