Rockwell Automation 1756-OB16I DC Digital Output Module

Overview

The 1756-OB16I is a high-performance DC digital output module designed for the Rockwell ControlLogix series. It supports 16 individually isolated outputs, providing robust signal control in demanding automation systems. With fast response times, configurable fault states, and linear derating for high-temperature environments, this module ensures reliable operation in industrial applications.

The module meets UL, CSA, CE, ATEX, and FM certifications, making it suitable for hazardous locations and global deployment. It offers synchronization with the ControlLogix system clock, user-configurable states, and strong surge protection.

Key Features

• 16 individually isolated outputs for precise control

• Output voltage range: 10–30V DC

• Output current:

• Per point: 2A max @ 30°C, 1A max @ 60°C

• Per module: 8A max @ 30°C, 4A max @ 60°C

• Backplane current: 350 mA @ 5.1V DC, 2.5 mA @ 24V DC

• Total backplane power: 1.8 W

• Max power dissipation: 3.6 W @ 60°C

• Thermal dissipation: 12.28 BTU/hr

• Surge current: 4A for 10 ms per point, repeatable every 2 s

• On-state voltage drop: 1.2V DC @ 2A

• Off-state leakage current: 0.5 mA max per point

• Output delay: OFF→ON: 1 ms, ON→OFF: 2 ms

• Minimum load current: 1 mA per point

Technical Specifications

Environmental Ratings

• Operating temperature: 0–60°C (32–140°F)

• Storage temperature: –40–85°C (–40–185°F)

• Relative humidity: 5–95% non-condensing

• Vibration: 2 g @ 10–500 Hz

• Operating shock: 30 g; Non-operating: 50 g

• ESD immunity: 6 kV contact, 8 kV air discharge

• Radiated RF immunity: 10 V/m, 30 MHz–2000 MHz

• Surge immunity: ±1 kV line-line, ±2 kV line-earth

Certifications

• UL & CSA: Listed for industrial control equipment and Class I, Div 2

• CE: EMC & Industrial Emissions compliant

• FM: Approved for Class I Division 2

• C-Tick / ATEX: Industrial and potentially explosive atmospheres compliance