(USA and Canada only)
AC31A, AC31B, and AC31C
115 VAC ± 10 VAC @ 60 Hz
220 VAC ± 20 VAC @ 50 Hz
10 - 28 VDC; 10 VDC @ 0.75 amps,
24 VDC @ 0.25 amps
Less than 4 watts @ 25 °C
0 to 70 °C
0 to 95% Humidity (non-condensing)
Full duplex selectable RS232 & RS485/422
Full duplex RS-485/422 serial port
300, 1200, 2400, 4800, 9600, 19200,
and 38400 baud
64,180 8-bit microprocessor
CPU Clock Frequency
Transmit, receive, and power
Address (0 to 255)
Terminating and biasing resistors
*** NOTE: AC31A and AC31B are obsolete and no longer available when current stock is depleted. AC31C is obsolete and no longer available *** Please contact Opto 22 Pre-Sales engineers to discuss options for your specific application.
The AC31 adapter card is a general purpose addressable interface that allows any slave serial device that uses asynchronous serial communications (terminals, printers, barcode readers, etc.) to be addressed and attached to a multidrop network.
The AC31 is an addressable interface for the OPTOMUX bus. Many devices incompatible with the OPTOMUX bus protocol can be made compatible by using an AC31.