Allen Bradley | 1756-OB16I | ControlLogix Series | 16-Channel Isolated DC Output Module

Product Description

The 1756-OB16I output module from Allen Bradley’s ControlLogix series is a discrete DC output unit engineered for applications requiring isolated channels. With sixteen individually isolated outputs, it ensures reliable signal separation and robust performance in industrial automation systems. Its fast response times, linear current derating, and compatibility with removable terminal blocks make it a versatile solution for distributed control environments.

Technical Specifications

• Manufacturer: Allen Bradley

• Product Line: ControlLogix

• Part Number: 1756-OB16I

• UPC: 612598164547

• Category: PLC Output Module

• Module Type: Isolated DC Output

• Outputs: 16 individually isolated points

• Nominal Voltage: 12–24 VDC (sink/source)

• Operating Voltage Range: 10–30 VDC

• Output Delay Times:

• OFF → ON: ≤1 ms

• ON → OFF: ≤2 ms

• Current Capacity (per point):

• 2 A @ 30 °C (86 °F)

• 1 A @ 60 °C (140 °F)

• Current Capacity (per module):

• 8 A @ 30 °C (86 °F)

• 4 A @ 60 °C (140 °F)

• Power Dissipation: 3.6 W @ 60 °C

• Backplane Current Draw:

• 350 mA @ 5 VDC

• 3 mA @ 24 VDC

• Isolation Voltage: 50 V continuous

• Slot Width: Single slot

• Compatible Removable Terminal Blocks: 1756-TBCH, 1756-TBS6H

• Weight: 0.50 lbs (0.23 kg)

• Enclosure Type: Open-style

Key Features

• Sixteen isolated DC outputs for enhanced signal integrity.

• Fast switching response suitable for high-speed automation.

• Linear derating ensures reliable operation across temperature ranges.

• Compact single-slot design for ControlLogix chassis.

• Flexible wiring options with removable terminal blocks.

Application Scenarios

• Industrial automation systems requiring isolated DC outputs.

• High-speed machine control with multiple output channels.

• Distributed control systems in manufacturing and process industries.

FAQ

Q: What makes the 1756-OB16I different from the 1756-OB16E?   A: The 1756-OB16I provides individually isolated outputs, while the 1756-OB16E includes electronic fusing for protection.

Q: What is the maximum current per channel?  A: Each channel supports up to 2 A at 30 °C and 1 A at 60 °C.

Q: Which terminal blocks are compatible?  A: The module supports 1756-TBCH and 1756-TBS6H removable terminal blocks.