- Four 120 V AC input points
- Four relay output points
- Mixed I/O functions in one SLC 500 slot
1746-IO8 combines four 120 V AC inputs and four relay outputs in one SLC 500 chassis slot. The layout supports compact machines requiring a small mixed-I/O count.
The input section operates from 85–132 V AC. Relay outputs can switch documented AC or DC circuits, subject to point current, module current, inrush, duty, and suppression requirements.
Commissioning must distinguish LED status from field voltage. Rockwell notes that output LEDs may illuminate briefly at startup or when the rack is not yet controlled by the processor.
Availability, condition, price, and shipping time for 1746-IO8 are confirmed during quotation.
Allen-Bradley 1746-IO8 4-Input 4-Relay Output Combination Module Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Four 120 V AC input points are assigned to the input section
- Four relay outputs are assigned to the separate output section
- Input commons and relay contacts must be mapped separately in the SLC 500 program
- Match each relay circuit to the connected AC or DC load
- Check inrush, switching duty, and suppression before energizing a load
- Keep field protection and commons consistent with the module wiring diagram
- Verify commons and terminal assignments against the original drawing
- Do not infer field energization from startup LED status alone
- Confirm processor control before functional testing of relay outputs
- Small mixed-I/O machine control
- Legacy SLC 500 panel maintenance
- Replacement of a verified 1746-IO8 installation