Overview
The Allen-Bradley 1756-OB16E is a ControlLogix 16-point digital output module designed for reliable DC signal switching in industrial automation systems. Featuring electronically fused outputs organized in two groups of 8 points each, this module delivers precise control of solenoids, motor starters, indicator lights, and other field devices in manufacturing and process control applications.
Key Features
- 16 Digital Outputs: 16 outputs, fully electronically fused and allocated across two separate groups of eight outputs each
- Wide Voltage Range: Supporting a voltage category of 12 and 24 Volts DC, it functions reliably within an operating voltage range from 10 to 31.2 Volts DC
- Fast Response: Output delay time, rated at just 1 millisecond, ensuring quick transitions from off to on and vice versa
- Integrated Fusing: Electronically fused per point for circuit protection without external fuses
- Low Inrush Current: Minimal power draw simplifies backplane and power supply design
- Studio 5000 Compatible: Direct integration with Rockwell’s Allen-Bradley programming environment
Technical Specifications
16 electronically fused (8 points/group) outputs, 12/24V DC source, operating voltage range 10…31.2V DC. Output delay time off to on is 70 µs nominal/1 ms max; on to off is 360 µs nominal/1 ms max. Current draw @ 5.1V is 250 mA; current draw @ 24V is 2 mA. Total backplane power is 1.32 W. Power dissipation, max is 4.1 W @ 60 °C. Off-state leakage current per point, max is 1 mA per point. On-state voltage drop, max is 400 mV DC @ 1 A. Current per point, max is 1 A @ 60 °C. Current per module, max is 8 A @ 60 °C.
Typical Applications
- Solenoid valve control in fluid power systems
- Motor starter and contactor switching
- Status indicator and alarm light control
- Pneumatic actuator activation
- Industrial conveyor belt and packaging line control
- Water treatment and chemical process automation
- HVAC system control in large facilities
Compatibility & Replacements
Compatible With
- ControlLogix 1756 Chassis (1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17, 1756-A23)
- ControlLogix Controllers (1756-L5xE, 1756-L7x, 1756-L73, 1756-L55, 1756-L56)
- Allen-Bradley remote I/O terminals via EtherNet/IP
- FlexLogix and CompactLogix systems with proper gateway modules
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The 1756-OB16E is the current-production 16-point electronically fused DC output module in the ControlLogix family and typically replaces earlier non-keyed output modules when migrating to keyed I/O architectures.
Works With
- Rockwell Studio 5000 Logix Designer (RSLogix 5000)
- EtherNet/IP communication protocol
- Modbus TCP (via gateway modules)
- PROFINET (via gateway modules)
- ControlLogix Hot Standby and redundancy firmware
- Allen-Bradley Connected Components Workbench
