Overview
The Allen-Bradley 1746-OBP16 is a digital DC output module engineered for the SLC 500 series controller platform. This 16-channel output module provides sourcing-type DC outputs in the 20.4–26.4V DC range and is designed for high-current industrial applications, including manufacturing, material handling, and process control systems. The module occupies a single slot in an SLC 500 chassis (fixed or modular configuration) and includes integrated fuse protection with blown-fuse diagnostics for enhanced system reliability.
Key Features
- 16 DC output channels with sourcing configuration
- Fused commons with E-FEUSE LED blown-fuse indicator
- Fast turn-off capability with surge suppressors for inductive load switching
- 1.5A continuous current per point at 86°F (standard temperature)
- 0.31W per-point heat dissipation; 6.26W total module dissipation
- Signal delay: 0.1ms on-state, 1ms off-state (max resistive load)
Technical Specifications
- Output Voltage Range: 20.4–26.4V DC
- Output Channels: 16 points (all commons fused)
- Continuous Current per Point: 1.5A @ 86°F
- Backplane Current: 250mA @ 5V; 0mA @ 24V
- Heat Dissipation: 0.31W per point; 6.26W total
- On-State Voltage Drop: 1.0V @ 2.0A (max)
- Switch Delay (On): 0.1ms @ max resistive load
- Switch Delay (Off): 1ms @ max resistive load
- Minimum Load Current: 1mA
- Off-State Leakage Current: 1mA
- Surge Current Capacity: 32A per module for 10ms
- Module Mounting: Single slot, SLC 500 backplane
- Fuse Protection: Integrated commons fuse with LED indicator
- Compatible Platforms: SLC 500 (fixed and modular chassis)
Typical Applications
The 1746-OBP16 is well-suited for control and switching applications requiring discrete 24V DC outputs:
- Solenoid and motor contactor switching
- Indicator light and alarm signal control
- Pneumatic/hydraulic valve activation
- Conveyor and drive motor enable/disable logic
- Machine vision and sensor trigger outputs
- Pilot-duty control circuits in manufacturing systems
Compatibility & Replacements
Compatible With
- SLC 500 fixed-configuration controllers
- SLC 500 modular chassis (1746-A* series)
- RSLogix 500 programming software
- DeviceNet and ControlNet scanner modules (when paired with communication interfaces)
- Standard 24V DC field wiring (16 AWG minimum)
Replaces / Drop-In Replacement For
- 1746-OBP16 Series A, B, and earlier revisions
- Direct replacement in SLC 500/01 and SLC 500/02 systems
- Equivalent to 1746-OBP16E for non-enhanced applications
Works With
- RSLogix 500 (Rockwell Automation programming environment)
- EtherNet/IP communication (via optional adapter modules)
- ControlNet and DeviceNet (via I/O scanner modules)
- SLC 500 power supplies (24V DC, 2–5A minimum recommended)
