Buy now: Allen-Bradley 1762-OW16 MicroLogix Expansion Relay Module
Atlantechdrives provides you the 1762-OW16, a high-density 16-point relay output expansion module for the MicroLogix 1100, 1200, and 1400 controllers. This module is the industry standard for switching heavy AC and DC loads, providing high current capacity and complete electrical isolation in a single-slot footprint.
- Outputs: 16 Normally Open (N.O.) Relays
- Voltage Range: 5 to 265V AC / 5 to 125V DC
- Continuous Current per Point: 2.5A (max)
- Bus Current: 120 mA @ 5V DC / 140 mA @ 24V DC
- Output Type: Individually Isolated Relay Groups
Technical Performance: Robust Switching for Industrial Loads
The 1762-OW16 is engineered to handle the physical and electrical stress of high-frequency switching. With 16 points, it provides an exceptional I/O density for relay-based control. Each relay is capable of switching up to 2.5 Amperes, making it suitable for driving motor starters, large solenoids, and heavy-duty indicators directly without the need for interposing relays. The mechanical isolation provided by the relays allows the 1762-OW16 to mix different AC and DC voltages on the same module, offering a level of flexibility that solid-state modules cannot match. The module’s internal architecture includes high-grade opto-couplers to protect the PLC backplane from the flyback voltage and noise generated during contact switching, ensuring the long-term health of the MicroLogix processor.
Expert Tips: Extending Relay Life with Surge Suppression
Mechanical relays have a finite lifespan based on the number of switching cycles. To maximize the life of your 1762-OW16, surge suppression is mandatory for inductive loads. When switching AC solenoids or contactors, install an RC snubber across the load. For DC loads, install a flyback diode. This significantly reduces contact arcing, which is the primary cause of relay «pitting» or welding. In applications with very high cycle rates (e.g., switching every second), consider using a solid-state module like the 1762-OB16 for those specific points to avoid the mechanical wear associated with the 1762-OW16.
Maintenance and Hardware Reliability
Maintenance for the 1762-OW16 focuses on physical inspections. Periodically check the terminal block for signs of heat discoloration, which could indicate a loose connection carrying high current. If a specific point fails, it is usually the physical relay contact; since these are not individually replaceable, the entire module must be swapped. Having a spare 1762-OW16 in stock is essential for facilities with many relay outputs, as they are often the first component to fail in an aging system. Sourcing from Atlantechdrives guarantees a factory-tested module that meets all original vibration and shock ratings, ensuring your machinery stays online under harsh industrial conditions.
FAQs
Q: Can I mix 120V AC and 24V DC on the 1762-OW16?
A: Yes, the 1762-OW16 features isolated groups, allowing for different voltage potentials on the same module.
Q: What is the maximum response time?
A: The typical turn-on and turn-off time for the mechanical relays is 10ms.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here.
This high-density 16-point relay module provides universal load switching for large MicroLogix 1200 setups.
