1756-OB16I Output Module Allen-Bradley

Allen-Bradley 1756-OB16I Output Module

Key Specifications

• Brand: Allen-Bradley
• Series: ControlLogix
• Model: 1756-OB16I
• Output Channels: 16 isolated points
• Voltage Range: 10-30V DC
• Current per Point: 2A @ 30°C / 1A @ 60°C
• Module Current: 8A @ 30°C / 4A @ 60°C
• Response Time ON: 1ms maximum
• Response Time OFF: 2ms maximum
• Power Dissipation: 3.6W maximum
• Isolation: 50V continuous
• Terminal Blocks: 1756-TBCH, 1756-TBS6H

Key Features & Benefits

• Individual Channel Isolation - Each output operates independently
• Configurable Safe States - Define output behavior during faults
• High Current Capacity - 2 amps per point at 30°C
• Fast Response Times - 1ms turn-on and 2ms turn-off maximum
• Flexible Wiring - Supports isolated and non-isolated schemes
• Visual Indicators - 16 integrated LEDs show channel status
• Wide Compatibility - Works with all 1756 ControlLogix chassis

Installation & Setup

• Slot Requirement: Single slot module for easy integration
• Terminal Blocks: Compatible with 1756-TBCH or 1756-TBS6H
• Chassis Support: Fits all 1756 local and remote chassis
• Power Requirements: 350mA @ 5.1V DC backplane current
• Fuse Protection: Recommended external 4A quick-acting fuses
• Wiring Options: Individual isolated or common source configurations

Performance Characteristics

• Current Rating: 2A per point at 30°C, derating to 1A at 60°C
• Total Capacity: 8A module total at 30°C, 4A at 60°C
• Surge Current: 4A for 10ms repeatable every 2 seconds
• Voltage Drop: 1.2V maximum at 2A load current
• Leakage Current: 0.5mA maximum off-state per point
• Minimum Load: 1mA per channel for proper operation

Safety & Protection

• Isolation Rating: 250V output-to-backplane continuous isolation
• Safe State Configuration: Programmable states for fault conditions
• LED Indicators: Individual channel status monitoring
• External Fusing: Support for 4A quick-acting fuses
• Inductive Load Protection: Recommended surge suppression devices

Application Examples

• Industrial Relays - Control contactors and motor starters
• Solenoid Valves - Actuate pneumatic and hydraulic systems
• Warning Devices - Operate sirens, horns, and strobe lights
• Indicator Systems - Drive pilot lamps and status displays
• Process Control - Manage actuators and positioning systems

Frequently Asked Questions

What makes the OB16I different from other output modules?

• The 1756-OB16I provides individual isolation for each output channel, allowing different voltage sources per output.

What current can each output handle?

• Each output supports 2 amps at 30°C, derating linearly to 1 amp at 60°C.

Are external fuses required?

• Yes, we recommend using 4A quick-acting fuses for output protection.

What are configurable safe states?

• You can define whether outputs stay on, turn off, or hold last state during program mode or controller faults.

What terminal blocks are compatible?

• Use 1756-TBCH or 1756-TBS6H 36-pin removable terminal blocks for wiring.

How fast does the module respond?

• Maximum response is 1ms for turn-on and 2ms for turn-off operations.

Can I use different voltage sources?

• Yes, individual isolation allows different 10-30V DC sources for each output.

For technical support and pricing information, contact our experts at: sales@nex-auto.com