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Documentation Number 232OPSDA1397 Manual 9
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5105
Power Supply Connections
The 232OPSDA requires an isolated external power supply that
is able to produce 9-16VDC @10mA in addition to the port power.
The positive(+) lead of the power supply is connected to the terminal
block labeled +12VDC and the negative(-) lead is connected to the
terminal block labeled GND. The external power supply powers the
I/O side of the module. The RS-232 side of the module is port
powered using RTS and DTR. These lines may be either LOW or
HIGH to provide power to the module. The two sources of power are
required for optical isolation.