A-B 1756-OB16E Digital DC Output Module for Industrial Automation

A-B 1756-OB16E Digital DC Output Module for Industrial Automation

The A-B 1756-OB16E is a workhorse for industrial automation setups where precise DC output control matters. Designed for demanding environments like automotive assembly lines and chemical processing plants, this module handles 16 electronically fused outputs at 24VDC nominal—perfect for managing solenoids, valves, and motor starters. Its robust build tolerates voltage fluctuations between 10-31.2VDC, which I’ve seen come in handy during power grid instability in older factory buildings.

Technical Specifications

• Series: ControlLogix
• Product Type: Digital DC Output Module
• Outputs: 16-point electronically fused
• Voltage Range: 10–31.2 VDC
• Typical Dimensions: 118mm (H) x 72mm (W) x 40mm (D)
• Weight: ~220g
• Certifications: UL Listed, CSA Certified

Field technicians particularly appreciate its compact footprint for retrofitting cramped control cabinets. In food processing facilities I’ve worked with, the module’s resistance to voltage spikes from heavy-duty equipment like conveyors and mixers proved invaluable. We frequently pair it with complementary ControlLogix modules such as 1756-IB16 input cards and 1756-CN2R communication adapters for complete system integration.

One standout feature? The electronic fuse design eliminates manual replacement hassles—unlike older mechanical systems that required shutdowns for fuse checks. For redundancy setups, engineers configure dual modules through ControlLogix backplanes to achieve fault-tolerant architectures. The LED diagnostics simplify troubleshooting; a customer in a steel mill once traced a faulty actuator in under 5 minutes using the panel indicators alone.

In short, this module delivers three key benefits: rock-solid output stability under electrical stress, space-saving design for modern control cabinets, and maintenance-friendly diagnostics. Its compatibility with Allen Bradley’s ecosystem—from Studio 5000 programming to existing ControlLogix chassis—makes it a low-risk choice for both new installations and legacy system upgrades.