1756-OB8 Allen-Bradley Digital Output Module

Allen-Bradley 1756-OB8 ControlLogix Digital Output Module

Key Technical Specifications

• Brand: Allen-Bradley
• Model Number: 1756-OB8
• Module Type: Digital DC Output
• Output Voltage: 24VDC (10-30VDC range)
• Number of Outputs: 8 Points
• Current per Point: 2 A @ 60°C
• Maximum Module Current: 8 A @ 60°C
• Response Time: 1 ms ON, 2 ms OFF
• Isolation Voltage: 50V Continuous

Performance Features

• The module provides eight independent output channels
• Each channel delivers 2 amps of continuous current
• Fast switching enables quick system response times
• Operating temperature range is 0 to 60 degrees Celsius
• Electrical isolation protects sensitive control circuitry
• Low power consumption reduces overall system heat generation

Installation Requirements

• Module occupies one slot in ControlLogix chassis
• Requires 20-pin removable terminal block
• Compatible with 1756-TBNH and 1756-TBSH connectors
• Install in any slot except the left-most position
• Supports both local and distributed I/O configurations
• Mechanical keying prevents incorrect terminal block installation

Configuration Options

• Set individual fault mode responses per point
• Configure program mode states for each channel
• Adjust Requested Packet Interval (RPI) timing
• Select from multiple communication format options
• Enable rack-optimized data exchange for efficiency
• Monitor module status through integrated diagnostics

Power Characteristics

• Backplane current draw: 165 mA at 5.1V DC
• Total backplane power: 0.89 Watts maximum
• Power dissipation: 2.5 Watts at 60°C
• Thermal dissipation: 8.53 BTU per hour
• Surge current capacity: 4A for 10 milliseconds
• Minimum load current: 2 mA per point

Frequently Asked Questions

What is the output capacity of the 1756-OB8 module?

The module provides eight output channels, each capable of 2 amps at 24VDC. The total maximum current for the module is 8 amps.

What terminal blocks are compatible with this module?

The 1756-OB8 requires 20-pin removable terminal blocks. Compatible models include 1756-TBNH and 1756-TBSH.

What is the operating voltage range?

The module operates with DC voltages from 10 to 30 volts, with 24VDC as the nominal operating voltage.

How fast does the module respond to control signals?

The module features quick response times: 1 millisecond maximum for ON transitions and 2 milliseconds for OFF transitions.

Is this product new and genuine?

Yes, we supply only brand new, genuine Allen-Bradley products in original packaging.

What is your shipping policy?

We process and ship orders within 5 business days using reliable carriers including DHL, FedEx, and UPS.

Do you offer returns?

Yes, we provide a 30-day return policy for all products in original condition.

For technical specifications or purchasing information, please contact: sales@nex-auto.com