Overview
The Allen-Bradley 1746-OW16 Series D is a 16-point relay output module designed specifically for the SLC 500 family of programmable logic controllers. This digital contact output module expands the relay switching capability of your SLC 500 system, enabling precise control of industrial loads including solenoids, motors, contactors, and pilot lights. With normally-open relay contacts and dual independent common groups, the module supports both AC and DC control voltages in the same enclosure, reducing the need for interposing relays and simplifying panel wiring.
Key Features
- 16 Normally-Open Relay Outputs – Configured as two groups of 8 outputs with separate common terminals
- Mixed-Voltage Operation – One group can control AC loads while the other controls DC, or both can use the same voltage
- Wide Operating Range – AC outputs rated 5–265V; DC outputs rated 5–125V
- High Current Capacity – Up to 1.5A per output @ 120V AC; 1.2A per output @ 24V DC
- Removable Terminal Block – Color-coded, self-lifting pressure-plate design for quick hot-swaps without rewiring
- Low Heat Dissipation – Only 0.033W per point, minimizing thermal load in control cabinets
Technical Specifications
- Output Type: Relay contact (normally open)
- Number of Outputs: 16 (two groups of 8 per common)
- Operating Voltage AC: 5–265V AC
- Operating Voltage DC: 5–125V DC
- Continuous Current per Output (Max): 1.5A @ 120V AC; 1.2A @ 24V DC
- Minimum Load Current: 10 mA @ 5V DC
- Backplane Current Load: 170 mA @ 5V; 180 mA @ 24V
- Heat Dissipation: 0.033W per output; 5.17W minimum; 5.7W total
- Operating Temperature: 0–60°C
- Storage Temperature: –40 to +85°C
- Terminal Block: 1746-RT25C (general-purpose orange)
- Series: D
- Compatible Models: All fixed and modular SLC 500 processors
Typical Applications
The 1746-OW16 is ideal for:
- HVAC system control and sequencing
- Motor and pump start/stop logic
- Solenoid valve operation
- Lighting and alarm contactor control
- High-speed assembly line automation
- Process control and material handling
- Industrial batch processing and sequencing
Compatibility & Replacements
Compatible With
- All SLC 500 fixed and modular processors
- SLC 5/01, 5/02, 5/03, 5/04, and 5/05 controllers
- SLC 500 chassis and mounting configurations
- Rockwell Automation backplane networks
Replaces / Drop-In Replacement For
The 1746-OW16 Series D is a standard replacement within the SLC 500 output module family. Verify compatibility with your system integrator before ordering to ensure slot compatibility and load requirements are met.
Works With
- Allen-Bradley RSLogix 500 programming software
- RSLinx communication platform
- SLC 500 I/O configuration tools
- Standard hardwired control circuits and relay logic
- Allen-Bradley industrial control networks
