1756-OB8EI Isolated Output Module Allen-Bradley

The Allen-Bradley 1756-OB8EI  Premium DC Output Module

Key Specifications

• Brand: Allen-Bradley
• Model: 1756-OB8EI
• Module Type: 8-Point Sourcing DC Output
• Output Configuration: Individually Isolated, Electronically Fused
• Nominal Voltage: 24 Volts DC
• Operating Voltage Range: 10 to 30 Volts DC
• Current per Point: 2 Amps at 60°C
• Total Module Current: 16A @ 55°C, derating to 10A at 60°C
• Surge Current: 4A for 10ms (repeatable)
• Output Delay (OFF to ON): 1 ms maximum
• Output Delay (ON to OFF): 5 ms maximum
• Backplane Current (5.1V): 250 milliamps
• Power Dissipation: 4.7 Watts at 60°C
• Isolation Voltage: 250V AC Continuous

Installation & Wiring

• The 1756-OB8EI installs into any standard ControlLogix chassis slot.
• You must use a compatible removable terminal block for wiring.
• Recommended terminal blocks are the 1756-TBCH or 1756-TBS6H.
• The module provides individual channel isolation for enhanced safety.
• Electronic fusing protects each output from short-circuit conditions.

Performance & Features

• This module offers very fast switching response times for precise control.
• It supports a wide operating voltage from 10V to 30V DC.
• The design ensures reliable operation in temperatures from 0°C to 60°C.
• You can configure fault states (Hold Last State, Go to Program Mode).
• It is ideal for driving actuators, solenoid valves, and indicator lamps.

Frequently Asked Questions

Q: What does "electronically fused" mean for this module?
A: Each output channel has built-in electronic protection that acts like a fuse. It quickly disables the output during a short circuit, preventing damage.

Q: What is the benefit of individually isolated outputs?
A: Isolation prevents a fault on one channel from affecting the others. It increases system reliability and simplifies troubleshooting.

Q: Is the 1756-OB8EI module currently in stock?
A: Yes, we have this ControlLogix module available for immediate shipment from our warehouse.

Q: What is your shipping and return policy?
A: We ship worldwide within 5 business days using major carriers. Unused items can be returned within 30 days.

Q: Can I use this module with a POINT I/O adapter?
A: Yes, the 1756-OB8EI is compatible with POINT I/O communication adapters for distributed control setups.

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