ControlLogix 1756-OB16E Allen-Bradley DC Output Module

Allen-Bradley 1756-OB16E – 16-Channel DC Output Module with Electronic Fusing

Quick Overview

The 1756-OB16E is a high-performance ControlLogix module with 16 DC outputs. It works with 10-31.2V DC devices like relays, solenoids, and indicators. Built-in electronic fuses protect each output group.

Key Features

• 16 outputs in 2 fused groups (8 outputs per group)
• Fast switching: ON in 1ms max, OFF in 1ms max
• High current: 1A per point, 8A total at 60°C
• Works with 1756-TBNH or 1756-TBSH terminal blocks
• Low power: only 250mA at 5V from backplane

Technical Specs

• Brand: Allen-Bradley
• Model: 1756-OB16E (Full suffix: 1756-OB16E/A)
• Voltage Range: 10-31.2V DC (24V nominal)
• Surge Current: 2A for 10ms (repeatable every 2s)
• Isolation: 250V continuous (tested at 1350V AC)
• Wire Size: 22-14 AWG copper
• Operating Temp: 0°C to 60°C

Compatibility

• Fits all 1756 ControlLogix chassis (A4, A10, A13, A17)
• Works as local or remote I/O
• Uses standard Studio 5000 software

Warranty & Shipping

• 12-month warranty – no hassles
• Fast shipping with FedEx, UPS, or DHL

Professional FAQ

• Q: Can I mix voltages on the 1756-OB16E?
  A: No, all outputs share the same power supply (10-31.2V DC).
• Q: What happens if a fuse trips?
  A: Only the affected group (8 outputs) stops working.
• Q: Is this module good for LED indicators?
  A: Yes, but add a resistor if using low-current LEDs (<3mA).
• Q: Can I replace fuses myself?
  A: No – fuses are electronic and reset automatically.
• Q: How many 1756-OB16E modules can I use in one chassis?
  A: Depends on power supply capacity (max 8A per module).

Need wiring diagrams or full specs? Download the 1756-OB16E manual here.