Allen‑Bradley 1756-OB16IEFS Scheduled Fast Isolated DC Digital Output Module

Product Overview

Core Specifications

• Output channels: 16 independent isolated source-type DC outputs
• Operating voltage: 10–30 VDC (12/24 VDC standard control power)
• Single channel rating: 2 A @ 30°C, 1 A @ 60°C; total module max 8 A @ 30°C, 4 A @ 60°C
• Time scheduling precision: Minimum 5 μs scheduled output interval, CIP Sync slave device for timestamp synchronization
• Isolation: 50 V continuous isolation between each channel and backplane
• Electronic protection: Independent electronic fuse for each channel, overcurrent & short-circuit self-protection without physical fuses
• Backplane power consumption: 350 mA @ 5 VDC, 3 mA @ 24 VDC; max power dissipation 3.6 W @ 60°C
• Compatible removable terminal blocks: 1756-TBCH, 1756-TBS6H
• Environment: Operating temperature 0–60°C, IP20 cabinet installation, CE certified
• Diagnostic indicators: Module running, fault and individual channel status LED lights

Main Functions

1. Deliver high-speed, time-synchronized digital output signals to drive solenoid valves, relays, indicators and small actuators
2. Support MAOT motion cam output function for precise synchronous trigger of multi-axis automation equipment
3. Real-time channel fault diagnosis, report short-circuit, overload and open-circuit alarms to the ControlLogix controller
4. Independent channel isolation eliminates cross-channel signal interference, stable for long-distance field wiring
5. Support RIUP hot-swap replacement, no need to power off the whole rack during maintenance

Key Advantages

• Unique CIP Sync scheduling capability ensures microsecond-level synchronous output for motion control
• Per-point electronic fusing prevents single channel fault from damaging the whole module or PLC backplane
• Full channel isolation greatly improves anti-interference performance in complex industrial electromagnetic environments
• Fast response speed meets high-speed production line and motion cam trigger requirements
• Plug-and-play RTB terminal base retains all field wiring during module replacement, shortens downtime

Typical Applications