Allen-Bradley 1791ES-IB8XOBV4 Digital I/O Cards
Configured for safety-critical discrete input monitoring and output actuation in EtherNet/IP networks, the Allen-Bradley 1791ES-IB8XOBV4 (1791ES-IB8XOBV4 CompactBlock Guard Safety I/O Module) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1791ES-IB8XOBV4 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.10 lbs (0.50 kg) |
| Dimensions | Standard CompactBlock Guard I/O profile |
| Operating Temp | Standard Allen-Bradley industrial operating range |
| Power Consumption | Standard 24 VDC auxiliary power draw |
| Module Type | Safety Digital I/O Module |
| Input Channels | 8 isolated safety inputs |
| Output Channels | 4 dual-channel safety outputs |
| Output Current | 250 mA max per output point |
| Operating Voltage | 24 VDC |
| Communication Network | EtherNet/IP (CIP Safety) |
Backplane Bus Communication Velocity and CIP Safety Network Determinism
The Allen-Bradley 1791ES-IB8XOBV4 utilizes CIP Safety protocol over EtherNet/IP deterministic networks to execute real-time safety functions without requiring dedicated hardwired safety buses. Internal cross-checking diagnostics and dual-channel output drivers evaluate safety loop status continuously, ensuring deterministic fail-safe response times during emergency stop or light curtain trips. Featuring firmware flash compatibility and high-density I/O integration, the module executes internal self-tests to detect short circuits, cross-faults, and wire breaks before switching safety outputs.
Frequently Asked Questions
Q: What communication protocol is used by the 1791ES-IB8XOBV4 safety block?
A: The module communicates over standard EtherNet/IP networks utilizing CIP Safety messaging layers for fail-safe data exchange with GuardLogix safety controllers.
Q: How are the safety outputs structured on the 1791ES-IB8XOBV4 module?
A: The module provides 4 dual-channel safety outputs rated for up to 250 mA per channel at 24 VDC, designed for direct actuation of safety contactors and control devices.
Field Installation Guidelines
- Secure the 1791ES-IB8XOBV4 module onto the control panel DIN rail or mounting plate using appropriate hardware.
- Connect the 24 VDC field power supply lines to the designated power terminals, verifying correct DC polarity before energizing the system.
- Terminate safety field input and output wiring using shielded conductors, ensuring wire shields are grounded at the central panel earthing point.
- Route EtherNet/IP communication cables and 24 VDC safety signal wiring in dedicated wire trays separated from high-voltage AC conductors and motor drives.
Allen-Bradley 1791ES-IB8XOBV4 Digital I/O Cards
Allen-Bradley 1791ES-IB8XOBV4 Digital I/O Cards
Configured for safety-critical discrete input monitoring and output actuation in EtherNet/IP networks, the Allen-Bradley 1791ES-IB8XOBV4 (1791ES-IB8XOBV4 CompactBlock Guard Safety I/O Module) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1791ES-IB8XOBV4 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.10 lbs (0.50 kg) |
| Dimensions | Standard CompactBlock Guard I/O profile |
| Operating Temp | Standard Allen-Bradley industrial operating range |
| Power Consumption | Standard 24 VDC auxiliary power draw |
| Module Type | Safety Digital I/O Module |
| Input Channels | 8 isolated safety inputs |
| Output Channels | 4 dual-channel safety outputs |
| Output Current | 250 mA max per output point |
| Operating Voltage | 24 VDC |
| Communication Network | EtherNet/IP (CIP Safety) |
Backplane Bus Communication Velocity and CIP Safety Network Determinism
The Allen-Bradley 1791ES-IB8XOBV4 utilizes CIP Safety protocol over EtherNet/IP deterministic networks to execute real-time safety functions without requiring dedicated hardwired safety buses. Internal cross-checking diagnostics and dual-channel output drivers evaluate safety loop status continuously, ensuring deterministic fail-safe response times during emergency stop or light curtain trips. Featuring firmware flash compatibility and high-density I/O integration, the module executes internal self-tests to detect short circuits, cross-faults, and wire breaks before switching safety outputs.
Frequently Asked Questions
Q: What communication protocol is used by the 1791ES-IB8XOBV4 safety block?
A: The module communicates over standard EtherNet/IP networks utilizing CIP Safety messaging layers for fail-safe data exchange with GuardLogix safety controllers.
Q: How are the safety outputs structured on the 1791ES-IB8XOBV4 module?
A: The module provides 4 dual-channel safety outputs rated for up to 250 mA per channel at 24 VDC, designed for direct actuation of safety contactors and control devices.
Field Installation Guidelines
- Secure the 1791ES-IB8XOBV4 module onto the control panel DIN rail or mounting plate using appropriate hardware.
- Connect the 24 VDC field power supply lines to the designated power terminals, verifying correct DC polarity before energizing the system.
- Terminate safety field input and output wiring using shielded conductors, ensuring wire shields are grounded at the central panel earthing point.
- Route EtherNet/IP communication cables and 24 VDC safety signal wiring in dedicated wire trays separated from high-voltage AC conductors and motor drives.
