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SEQUENTIAL TURN-ON/TURN-OFF
The IA Series comes standard with remote sequential turn-on for applications not under computer
control. The amplifier front power switch is set to “STANDBY”. An external Direct Plug-In Power
Supply Unit providing a nominal voltage between 12 to 24 volts DC must be applied to the rear-
mounted
4-pin plugable terminal. The “ENABLE OUT” is connected to the “ENABLE IN” of the next amplifier.
IA Series amplifiers are bussed or “daisy-chained” together in parallel and connected to the DC sup-
ply by connecting all “24V DC+” terminals together and all “COMMON” terminals together. The first
amplifier in the chain requires an SPST closure between its “ENABLE IN” terminal and “24V DC+”
terminal to initiate the power turn-on sequence and keep the amplifiers in the chain powered on.
This function may be performed under computer control if equipped with an optional module contain-
ing sequential capability. If this optional module is used, no connections need be made to the
plugable terminal.
SEQUENTIAL TURN-ON/TURN-OFF WIRING
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