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AM-10HD / Aug 2008
G E N E R A L I N F O R M A T I O N
GP0
The AM-10HD provides four General Purpose Output (GPO) circuits that may
be used in a variety of ways. Like the GPI circuits, the GPO utilizes optoisolators
in order to provide high electrical isolation from the outside world.
Unlike the GPI circuits, though, each of the GPO’s has completely isolated
return circuits — that is, they do not share a common return. Because of this each
GPO may be used in any way desired without concern of cross coupling between
unrelated external circuits.
The optoisolators on the GPO are rated at a maximum of 350 Volts AC or DC
and with a maximum load current of 100mA. Because of the AC rating, external
circuit polarity is unimportant and therefore we will simply define the GPO pins
as “Source” and “Return.”
The pin assignment for the rear panel DB-9 GPO connector is as follows:
Pin 1 - N/C
Pin 2 – GPO 1 Return
Pin 6 – GPO 1 Source
Pin 3 – GPO 2 Return
Pin 7 – GPO 2 Source
Pin 4 – GPO 3 Return
Pin 8 – GPO 3 Source
Pin 5 – GPO 4 Return
Pin 9 – GPO 4 Source
