1756-OW16I Allen Bradley | 16 Point Individually Isolated N.O.

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

Product Description

The 1756-OW16I (1756-OW16I/A) is a high-performance digital relay contact output module belonging to the Allen-Bradley ControlLogix series. Engineered for maximum flexibility in industrial environments, this module features 16 Normally Open (N.O.) contacts that are individually isolated. This architecture allows each point to switch a different power source or voltage level, effectively eliminating common-bus limitations.

This module is essential for applications requiring galvanic isolation between the controller backplane and field-side AC or DC loads. Its robust mechanical relays are ideal for driving solenoids, motor starters, contactors, and indicating lamps. The 1756-OW16I (1756-OW16I/A) ensures reliable performance in mixed-voltage systems where digital semiconductor outputs are unsuitable due to leakage current or voltage drop requirements.

Detailed Technical Specifications

The following technical parameters outline the electrical and environmental constraints of the 1756-OW16I (1756-OW16I/A):

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model/Catalog Number: 1756-OW16I (Series A)

• Module Type: Digital Relay Contact Output (Individually Isolated)

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

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

• Pilot Duty Rating: C300 / R150

• Current Rating per Point: 1 A @ 5–30V DC; 0.5 A @ 48V DC; 0.22 A @ 125V DC; 1.5 A @ 120V AC; 0.75 A @ 240V AC

• Maximum Current per Module: 8 A @ 60°C (140°F)

• Minimum Load Current: 10 mA per point

• Response Time (Max): Off to On: 10 ms; On to Off: 10 ms

• Initial Contact Resistance: 100 mΩ @ 6V 1A

• Off-State Leakage Current: 1.5 mA per point

• On-State Voltage Drop: 400 mV DC @ 1 A (max)

• Backplane Current Draw: 150 mA @ 5.1V DC; 150 mA @ 24V DC

• Power Dissipation: 4.5 W @ 60°C (140°F)

• Thermal Dissipation: 15.35 BTU/hr

• Isolation Voltage: 250V continuous (tested at 1500V DC for 60 seconds)

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