Overview
The Allen-Bradley 1756-OW16I /A is a 16-point isolated relay output module designed for Rockwell ControlLogix systems. Each of the 16 channels features independently isolated normally open (N.O.) relay contacts, allowing you to control isolated loads across AC and DC voltage ranges. The module supports input voltage of 5–125V DC and 10–240V AC, with individual isolation providing superior noise immunity and fault containment in multi-circuit applications.
Key Features
- 16 individually isolated normally open (N.O.) relay contacts per module
- AC/DC rated: 10–240V AC and 5–125V DC operating ranges
- Contact ratings: 2 A @ 5–30V DC, 0.5 A @ 48V DC, 0.22 A @ 125V DC, 1.5 A @ 120V AC, 0.75 A @ 240V AC
- Fast on/off switching: 10 ms maximum response time
- Low power consumption: 150 mA @ 5.1V and 24V; 4.4 W total backplane power
- Single-slot CompactLogix/ControlLogix form factor (36-pin connector)
- Integrated status indicators for module health and communication
- CE, UL, CSA, RCM, and NRTL certifications
Technical Specifications
- Module Type: Digital Relay Output
- Output Count: 16 points (N.O., individually isolated)
- Operating Voltage Range: 5–125V DC; 10–240V AC
- Output Voltage Range (load dependent): 1 A @ 5–30V DC; 0.5 A @ 48V DC; 0.22 A @ 125V DC; 1.5 A @ 120V AC 50/60 Hz; 0.75 A @ 240V AC 50/60 Hz
- Output Delay Time: 10 ms max (off to on); 10 ms max (on to off)
- Current Draw: 150 mA @ 5.1V; 150 mA @ 24V
- Total Backplane Power: 4.4 W
- Power Dissipation: 4.5 W @ 60 °C (140 °F)
- Thermal Dissipation: 15.35 BTU/hr
- Off-State Leakage Current: 1.5 mA per point max
- Minimum Load Current: 10 mA per point
- Initial Contact Resistance: 100 mΩ @ 6V, 1 A max
- Operating Temperature: 0 to 60 °C (32 to 140 °F)
- Form Factor: 1 slot; 36-pin connector
- Certifications: CE, UL Listed, CSA, Australian RCM, NRTL, Eurasian Economic Community
Typical Applications
- Industrial plant automation and process control systems
- Machine tool control and motion coordination
- HVAC and environmental control systems
- Pump and motor starter control
- Alarm and annunciator signaling circuits
- Multi-voltage load switching in distributed control architectures
- Hazardous location applications (UL Listed for certain hazardous areas)
Compatibility & Replacements
Compatible With
- ControlLogix 5570, 5580, and legacy ControlLogix platforms
- CompactLogix systems via backplane/communication modules
- EtherNet/IP industrial networks
- Rockwell Studio 5000 Logix Designer programming environment
- Allen-Bradley ControlLogix I/O backplanes and chassis
Replaces / Drop-In Replacement For
- Earlier 1756-OW16 (non-isolated) models where isolation is now required
- Verify compatibility with your specific ControlLogix chassis and firmware version before ordering
Works With
- Studio 5000 Logix Designer (all current versions)
- EtherNet/IP and ControlLogix communication modules
- Allen-Bradley PowerFlex drives and I/O modules
- Third-party SCADA and HMI systems via EtherNet/IP gateway
