Allen-Bradley 1746-IM16 SLC 500 AC Input Module
Configured for 16-channel high-voltage AC discrete signal acquisition in SLC 500 platforms, the Allen-Bradley 1746-IM16 (1746-IM16 Digital Input Module) provides direct physical/electrical execution. It converts incoming 200-240 VAC binary signal transitions from field devices such as pushbuttons, limit switches, and relay contacts into low-voltage logic states passed across the backplane bus.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1746-IM16 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.20 lbs (0.09 kg) |
| Dimensions | Single-slot SLC 500 chassis module form factor |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | Powered via SLC 500 chassis backplane bus |
| Number of Inputs | 16 discrete inputs |
| Input Voltage Category | 200-240 VAC nominal (50/60 Hz) |
| Operating Voltage Range | 170 to 265 VAC |
| Signal Type | AC Digital Input |
Backplane Bus Velocity & Deterministic Network Execution
The 1746-IM16 incorporates optical isolation barriers between field input terminals and internal backplane logic to safeguard system electronics from external voltage spikes and electrical noise. Designed to maintain high-speed backplane bus communication velocity across SLC 500 chassis layouts, the card converts high-voltage AC inputs into deterministic digital logic data frames. Onboard RC filtering circuits condition incoming AC signals, suppressing contact chatter and transient interference before updating the processor I/O image table during active deterministic networks execution.
Frequently Asked Questions
Q: Can 120 VAC signals be wired directly to the 1746-IM16 input module?
A: No, the 1746-IM16 is rated specifically for 200-240 VAC nominal inputs (170-265 VAC operating range). Applying 120 VAC will not reliably trigger the input threshold logic.
Q: How does the module indicate the status of individual field input channels?
A: The module features 16 LED status indicators on the front panel, providing real-time visual diagnostic feedback for the ON/OFF state of each field input channel.
Field Installation Guidelines
- Chassis Slot Insertion: Align the module circuit board with the guide rails in any available local or remote SLC 500 chassis slot (except slot 0, reserved for the CPU). Slide the module inward until top and bottom retaining latches lock securely into the chassis frame.
- Terminal Block Wiring: Connect 200-240 VAC field conductors to the removable terminal block (1746-RT26). Route incoming AC wiring through dedicated wire ducts separated from low-voltage DC and communication cables to avoid noise coupling.
- Grounding & Safety: Ensure the SLC 500 chassis is bonded to protective earth ground using heavy-gauge copper braid. Turn off main power to the chassis and field circuits before removing or wiring the terminal block assembly.
Allen-Bradley 1746-IM16 SLC 500 AC Input Module
Allen-Bradley 1746-IM16 SLC 500 AC Input Module
Configured for 16-channel high-voltage AC discrete signal acquisition in SLC 500 platforms, the Allen-Bradley 1746-IM16 (1746-IM16 Digital Input Module) provides direct physical/electrical execution. It converts incoming 200-240 VAC binary signal transitions from field devices such as pushbuttons, limit switches, and relay contacts into low-voltage logic states passed across the backplane bus.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1746-IM16 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.20 lbs (0.09 kg) |
| Dimensions | Single-slot SLC 500 chassis module form factor |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | Powered via SLC 500 chassis backplane bus |
| Number of Inputs | 16 discrete inputs |
| Input Voltage Category | 200-240 VAC nominal (50/60 Hz) |
| Operating Voltage Range | 170 to 265 VAC |
| Signal Type | AC Digital Input |
Backplane Bus Velocity & Deterministic Network Execution
The 1746-IM16 incorporates optical isolation barriers between field input terminals and internal backplane logic to safeguard system electronics from external voltage spikes and electrical noise. Designed to maintain high-speed backplane bus communication velocity across SLC 500 chassis layouts, the card converts high-voltage AC inputs into deterministic digital logic data frames. Onboard RC filtering circuits condition incoming AC signals, suppressing contact chatter and transient interference before updating the processor I/O image table during active deterministic networks execution.
Frequently Asked Questions
Q: Can 120 VAC signals be wired directly to the 1746-IM16 input module?
A: No, the 1746-IM16 is rated specifically for 200-240 VAC nominal inputs (170-265 VAC operating range). Applying 120 VAC will not reliably trigger the input threshold logic.
Q: How does the module indicate the status of individual field input channels?
A: The module features 16 LED status indicators on the front panel, providing real-time visual diagnostic feedback for the ON/OFF state of each field input channel.
Field Installation Guidelines
- Chassis Slot Insertion: Align the module circuit board with the guide rails in any available local or remote SLC 500 chassis slot (except slot 0, reserved for the CPU). Slide the module inward until top and bottom retaining latches lock securely into the chassis frame.
- Terminal Block Wiring: Connect 200-240 VAC field conductors to the removable terminal block (1746-RT26). Route incoming AC wiring through dedicated wire ducts separated from low-voltage DC and communication cables to avoid noise coupling.
- Grounding & Safety: Ensure the SLC 500 chassis is bonded to protective earth ground using heavy-gauge copper braid. Turn off main power to the chassis and field circuits before removing or wiring the terminal block assembly.
