Overview
The Allen-Bradley 1756-OB16IS is a ControlLogix chassis-based digital output module engineered for precision control in factory automation, process control, and machine protection systems. With 16 individually isolated output points, internal electronic fusing, and onboard diagnostics, this module delivers dependable performance in demanding industrial environments. It mounts directly into any 1756 ControlLogix chassis and communicates seamlessly across ControlNet or EtherNet/IP networks.
Key Features
- 16 independently isolated output channels with 1 A per-point current rating
- 10–30 VDC operating voltage range with 50 V continuous isolation
- Internal electronic fusing protects against overcurrent and short circuits
- 8 scheduled outputs for time-synchronized control
- Status LEDs for output and communication health monitoring
- Enhanced diagnostics detect open-wire and overload faults at point level
Technical Specifications
- Module Type: Digital Output, ControlLogix
- Number of Points: 16 (individually isolated)
- Output Voltage: 10–30 VDC
- Output Current: 1 A per point, max 8 A total module output
- Backplane Current: 350 mA at 4 VDC; 3 mA at 24 VDC
- Power Dissipation: 3.6 W at 60°C
- Isolation Voltage: 50 V continuous
- Operating Temperature: 0–60°C
- Mounting: 1756 Chassis slot (36-pin connector)
- Terminal Block: Removable 1756-TBCH or 1756-TBS6H (36 pins)
- Response Time: 1–2 milliseconds
- Certifications: UL, CSA, CE, KC, RCM
- Warranty: Used condition; consult distributor for warranty details
Typical Applications
- Machine control: robotic arms, conveyors, transfer lines
- Process automation: pump and valve control, solenoid switching
- Pilot duty applications: 24 VDC relay coils and indicator lamps
- Food and beverage: packaging, sorting, and labeling systems
- Water treatment: dosing pump and alarm valve control
- Automotive assembly: component clamping and part ejection systems
Compatibility & Replacements
The 1756-OB16IS is compatible with ControlLogix processors (CompactLogix, GuardLogix) and communicates via ControlLogix backplane. It integrates with other 1756 I/O modules, power supplies, and communication adapters in the same chassis. Related modules include the 1756-OB16I (non-scheduled) and 1756-OB32 (32-point output). Compatible programming environments include Studio 5000 Logix Designer and RSLogix 5000. Always verify firmware revision compatibility with your processor before deployment.
