Product Summary
The Allen-Bradley 1762-OW16 expands your MicroLogix system with sixteen reliable relay outputs. This module switches loads from 5 to 265V AC and 5 to 125V DC. It handles up to 2.5A per point and 16A total. Engineers trust this module for its robust isolation and easy DIN rail mounting.
Theme A: Product Procurement & Buyer Guide
Matching the 1762-OW16 to Your Application
You must verify the voltage and current requirements of your loads. The 1762-OW16 operates across a wide range. It works with 24-125V DC and 120-240V AC systems. For AC loads at 120-240V, each point supports 2.5A. For 125V DC loads, the limit drops to 2A. For 24V DC loads, the limit is 1A. Always check your load’s inrush current to avoid contact damage.
Understanding Channel Groups and Isolation
This module provides two isolated groups of eight outputs. Group 0 contains outputs 0 through 7. Group 1 contains outputs 8 through 15. This design allows you to control two different voltage types safely. You can run one group on AC power and the other on DC power. This feature simplifies wiring and increases system flexibility.
Critical Procurement Specifications to Verify
Always confirm the part number is exactly 1762-OW16 before ordering. This module weighs only 0.63 pounds and dissipates 6.1 Watts of heat. It draws 140 mA from the 5V DC bus and 180 mA from the 24V DC bus. The module measures 90 x 40.4 x 87 mm. It has an IP20 enclosure rating for basic protection.
System Expansion and Compatibility Limits
The 1762-OW16 works with MicroLogix 1100, 1200, and 1400 controllers. You can install up to four modules with a MicroLogix 1100. You can install up to six modules with a MicroLogix 1200. You can install up to seven modules with a MicroLogix 1500. Plan your system layout based on these maximums.
Protecting Your Investment with Surge Suppression
Connecting surge suppressors across inductive loads extends relay contact life. Inductive loads like motors and solenoids create high inrush currents. These currents can weld or pit the relay contacts over time. Allen-Bradley strongly recommends this practice for the 1762-OW16. This simple step reduces downtime and replacement costs.
Theme B: Step-by-Step User & Installation Guide
Step 1: Mechanical Mounting of the Module
Mount the 1762-OW16 on a standard DIN rail or directly to a panel. The module dimensions are 90 x 40.4 x 87 mm. The height including mounting tabs is 110 mm. Ensure the enclosure provides adequate airflow. The module dissipates 6.1 Watts of heat during operation.
Step 2: Connecting to the MicroLogix Controller
Attach the module to the right side of your base controller. The 1762-OW16 uses the standard MicroLogix expansion bus. Power down the controller before connecting or disconnecting the module. This prevents electrostatic discharge damage to the semiconductor components.
Step 3: Wiring the Relay Outputs
Each output channel has a normally open relay contact. Wire your load between the common terminal and the output terminal. The minimum on-state current is 10 mA. The maximum continuous current per common is 8A. The maximum continuous current per module is 16A. Use copper wire rated for at least 75°C.
Step 4: Applying Power and Testing
Apply power to the controller and the module. The signal delay for both ON and OFF transitions is 10 ms. Test each output by energizing it from the controller program. Measure the voltage across the load to confirm proper switching. Check for excessive heat at the terminals under full load.
Step 5: Implementing Surge Suppression
Install a surge suppressor across each inductive load. Connect the suppressor as close to the load as possible. This protects the relay contacts from voltage spikes. Refer to Allen-Bradley’s wiring guidelines for specific suppressor ratings. This step is critical for long-term reliability.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1762-OW16 relay output module
- One (1) removable terminal block
- One (1) installation and wiring instruction sheet
- Express delivery shipping is available via FedEx, UPS, and DHL.
