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Allen-Bradley 1746-OB16 Digital Output Module

1. Product Description

The 1746-OB16 is a 16-channel digital DC output module from Allen-Bradley’s SLC 500 series, designed for industrial automation applications. It provides 24V DC sourcing outputs for controlling devices such as relays, solenoids, and indicators in PLC-based control systems .

2. Key Features

16-Channel Output – Supports 24V DC sourcing outputs, with each channel capable of 0.5A continuous current and 4.0A surge current (for 10ms) .
Fast Response Time – 0.1ms turn-on delay and 1.0ms turn-off delay, suitable for high-speed control applications .
High Surge Capacity – Handles 32.0A total module surge current (16 channels × 4.0A) for short durations .
Compact Design – Single-slot module compatible with 1746-series chassis (e.g., 1746-A7, A10) .
LED Status Indicators – Provides per-channel output status for easy diagnostics .

3. Technical Specifications

Parameter	Specification
Output Type	16 sourcing DC outputs
Output Voltage	24V DC (10–50V DC range)
Current per Channel	0.5A (continuous), 4.0A (surge for 10ms)
Module Total Current	8A (continuous), 32A (surge)
Power Consumption	7.6W
Isolation	Non-isolated (all 16 channels share a common group)
Operating Temp.	0°C to 60°C
Certifications	CE, UL, CSA

4. Applications

Motor Control – Driving contactors and solenoids in assembly lines .
Process Automation – Actuating valves and pumps in water treatment plants .
Material Handling – Conveyor and packaging machine control .

5. Installation & Precautions

Wiring Compliance – Use shielded cables to minimize electrical noise .
Load Matching – Avoid exceeding 0.5A per channel or 8A module total .
Chassis Compatibility – Install in 1746-series chassis (avoid leftmost slot reserved for processors) .