The Allen-Bradley 1771-OFE1 Analog Output Module is a four-channel, 12-bit voltage-output module for PLC-5 I/O systems, converting digital values into precise DC analog voltages. Each of its four outputs operates independently on a PLC-5 universal I/O backplane (1771-A backplanes such as A1B–A4B) and provides 0–10 V DC with a 0–4095 code range. The module does not supply loop power to loop-powered devices, so external power is required for sensors or actuators. Operating temperature range is 0 to 60 °C. Rockwell Automation discontinued the 1771-OFE1 as of March 4, 2021, though existing units may still be in service.
