Product Overview
Industrial safety systems have evolved from simple hardwired relays to intelligent networked controllers. The Allen-Bradley 1791ES-IB16 CompactBlock Guard I/O EtherNet/IP Safety Module represents this shift, offering robust safety functionality in a compact form factor.
Technical Specifications Breakdown
Key parameters for the 1791ES-IB16 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Input Type | Current Sinking |
| Number of Inputs | Sixteen (16) |
| On-state voltage, min. | 11 VDC |
| Off-state Voltage, max. | 5VDC |
| Safety Output | Current sourcing |
| Pulse test output current | 0.7 A per output |
| Short circuit protection | Yes |
| Communication port | One (1) RJ45 |
| Power Consumption | 250 mA @ 24V dc |
| Operating Voltage Range | 19.2-28.8V dc |
Industry Applications
Its dual-channel mode evaluates input consistency for CAT 3/4 compliance, while single-channel mode supports CAT 2 applications. In packaging lines, the 1791ES-IB16 reduces wiring complexity compared to traditional safety relays, lowering installation costs and improving diagnostics.
Installation & Setup Guidance
Mount the module in an IP54-rated enclosure or higher. Use 0.34…1.5 mm² (22…16 AWG) solid or stranded copper wire with 75 °C insulation. For power and I/O wiring, ensure proper strain relief and separation from high-voltage cables. Configure the module via the EtherNet/IP network using a safety controller.
Maintenance & Reliability
Inspect the module periodically for dust accumulation and loose connections. The IP20 enclosure rating requires clean, dry environments. Verify that the operating voltage stays within 19.2-28.8V DC to avoid erratic behavior. The short circuit protection feature minimizes downtime from wiring faults.
Compatibility & Integration
The 1791ES-IB16 uses the Common Industrial Protocol (CIP) Safety over EtherNet/IP. It pairs with safety controllers to monitor I/O status and diagnostics. The single RJ45 port simplifies network integration. This module supports up to SIL CL 3 (IEC 61508) and CAT 4 / PLe (ISO 13849-1).
Selection Guide & Purchasing Advice
When selecting a safety I/O module, consider input count, output type, and safety level requirements. AutoDCSTech stocks this module and can assist with availability and lifecycle status. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Troubleshooting & Common Issues
If inputs fail to register, check the on-state voltage (minimum 11V DC) and off-state voltage (maximum 5V DC). For output faults, verify the pulse test output current (0.7 A per output) and ensure short circuit protection has not tripped. Use the module's diagnostics via the network to isolate wiring or sensor issues.
Availability & Condition at AutoDCSTech
| Part Number | 1791ES-IB16 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
