The 1756-OF4 is a 4-channel analog output module (ANP) in the ControlLogix large control system series from the Allen-Bradley brand of Rockwell Automation. As the core signal conversion hardware of this high-performance automation platform, it can be used as an actuator driver in industrial control systems, primarily to convert digital control logic in a PLC into continuous analog signals, thereby precisely driving various control valves, frequency converters, and servo drives in the field.
The 1756-OF4 integrates four single-ended output channels, supporting industry-standard current and voltage signal outputs, including 4–20 mA, 0–20 mA, and ±10V. It features high-precision 15-bit (plus one sign bit) digital-to-analog conversion resolution and introduces "synchronous output" technology, allowing all channels or channels across modules to refresh signals simultaneously, effectively eliminating control delays caused by time differences.
The 1756-OF4 connects to external lines via its matching 20-pin or 36-pin detachable terminal blocks (RTBs), ensuring stable operation even in harsh cabinet environments with severe vibration and electromagnetic interference, thus protecting core plant assets.
