Allen Bradley 1746-OV16 SLC 500 16 Point Digital Output Module

The 1746-OV16 is a 16-channel digital output module belonging to Allen-Bradley’s SLC 500 series, designed for industrial control systems requiring current sinking DC output. It operates with a 24V DC voltage category and is specialized in driving low-to-medium power DC loads such as solenoids, relays, and indicator lights, making it suitable for automated production lines, assembly equipment, and other industrial scenarios.

The module features a color-coded removable terminal block for easy wiring and maintenance, and supports compatibility with bulletin 1492 interface modules and pre-wired cables to simplify system integration. It adopts a current sinking output design, where each channel sinks current from the load to the module, ensuring stable switching control.

With built-in surge suppression capabilities for inductive loads (via external diode configuration), the module protects itself and connected devices from voltage spikes. It operates stably across a wide temperature range and has reasonable thermal dissipation performance, adapting to harsh industrial environments. The module draws power exclusively from the SLC 500 system backplane (5V DC), eliminating the need for external power supplies and optimizing chassis space utilization.

Core Specifications: 16 digital output channels, current sinking type, 24V DC voltage category. 16 points share a common terminal (16 points per common).

Electrical Parameters: Operating voltage range 10–50V DC. Single-channel continuous current 1.0A @ 30°C (86°F), 0.5A @ 60°C (140°F); module total continuous current 8.0A @ 0–60°C (32–140°F). Surge current per point 1.0A @ 30°C (86°F) and 1.0A @ 60°C (140°F) for 10ms (repeatable once every 1s @ 30°C, once every 2s @ 60°C).

Signal Performance: On-state voltage drop max 1.2V @ 0.5A. Minimum load current 1mA; off-state leakage current max 1mA. Signal on delay max 0.1ms (resistive load); signal off delay max 1.0ms (resistive load).

Power Consumption: Backplane current draw 270mA @ 5V DC, 0mA @ 24V DC. Thermal dissipation min 1.40W, max 7.60W; power per point 0.338W.

Environmental Adaptability: Operating temperature 0–60°C (32–140°F); storage temperature -40–85°C (-40–185°F); maximum ambient humidity 95% (non-condensing).

Mechanical & Wiring: Equipped with color-coded removable terminal block. Recommended surge suppression: 1N4004 diode reverse-wired across 24V DC inductive loads. Compatible with pre-wired cables (catalog number 1492-CABLE series) for connection to 20-terminal IFM/XIM.

Protection & Compatibility: Suitable for resistive and inductive loads (with surge suppression). Compatible with SLC 500 modular and fixed controllers. Not equipped with electronic short-circuit or overload protection (unlike E-series modules).

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