The 1769-OW8 is part of the Allen-Bradley 1769 Compact I/O family and is used primarily with CompactLogix controllers and MicroLogix 1500 for discrete output control where relay isolation and mixed-voltage loads are required. It provides 8 normally open (Form A) relay outputs, divided into two groups of four channels, allowing each group to switch different voltage categories or phases, such as AC loads on one group and DC loads on the other.
Each output can switch 5–265 V AC or 5–125 V DC, with typical on and off signal delays of 10 ms, suitable for general-purpose actuator control rather than high-speed pulse applications. The module’s contact ratings include up to 2.5 A continuous per point at 120–240 V AC, 2.0 A at 24 V DC, and 1.0 A at 125 V DC, with appropriate derating for higher ambient temperatures. Internally, the module draws about 125 mA at 5.1 V DC and 100 mA at 24 V DC from the 1769 backplane, with maximum heat dissipation of approximately 2.83 W.
The 1769-OW8 has a power supply distance rating of 8 modules, meaning a 1769 power supply (e.g., 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4) must be within 8 modules of the unit in a Compact I/O assembly. It occupies one slot width, mounts on DIN rail or panel, and uses a replaceable terminal block for field wiring with 22–14 AWG solid or 22–16 AWG stranded copper conductors. Status LEDs on the front indicate module and per-channel output status for easy diagnostics.
Typical uses include switching contactors, solenoid valves, indicator lamps, small motors, and other discrete loads where electrical isolation, higher current capability, or mixed AC/DC output voltages are required compared with solid-state DC output modules like 1769-OB8.
