Allen Bradley 1756-OW16I ControlLogix 240VAC 125VDC Output

Allen Bradley 1756-OW16I ControlLogix 16-Point Isolated Relay Output Module

Product Overview

The 1756-OW16I (1756-OW16I) is a high-performance digital relay output module designed for the Allen-Bradley ControlLogix platform. It features 16 Normally Open (N.O.) contacts that are individually isolated, allowing engineers to switch a variety of AC and DC voltages across different channels within the same module. This architectural flexibility makes it a primary choice for interfacing with field devices like heavy-duty solenoids, motor starters, and indicating lamps that require dry contact switching.

Unlike standard digital modules, the 1756-OW16I provides true galvanic isolation between outputs, preventing noise and ground loop interference from affecting the backplane logic. Its rugged design ensures reliable mechanical switching in demanding industrial environments, supporting diverse voltage potentials from 5V DC up to 240V AC.

Detailed Technical Specifications

The 1756-OW16I offers professional-grade electrical parameters for mixed-load switching:

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model/Part Number: 1756-OW16I

• Series: ControlLogix 1756

• Module Type: Digital Relay Output (Individually Isolated)

• Number of Outputs: 16 Normally Open (N.O.) points

• Operating Voltage Range: 5–125V DC; 10–240V AC (47–63 Hz)

• Continuous Current per Point: 2.0 A @ 5–24V DC / 120V AC; 1.0 A @ 240V AC

• Minimum Load Current: 10 mA per point

• Maximum Current per Module: 16 A (limited by terminal block capacity)

• Initial Contact Resistance: 100 mΩ

• Expected Contact Life: 300,000 cycles (resistive @ 2 A); 100,000 cycles (inductive)

• Switching Delay (OFF to ON): 10 ms maximum

• Switching Delay (ON to OFF): 10 ms maximum

• Backplane Current (5.1V DC): 150 mA

• Backplane Current (24V DC): 150 mA

• Power Dissipation (Max): 4.5 Watts

• Isolation Voltage: 250V (continuous), tested at 1500V AC for 60 s (point-to-point and point-to-backplane)

• Removable Terminal Block (RTB): 1756-TBCH or 1756-TBS6H (36-pin)