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Description
The Allen-Bradley 1771-OZL is a high-performance digital output module designed for the PLC-5 programmable controller system. This module features 8 reed relay contact outputs, providing reliable switching for low-voltage control applications. It is engineered for integration into 1771 I/O chassis, offering a robust solution for industrial automation tasks requiring isolated contact switching.
Features
- 8 Form A (Normally Open) reed relay outputs.
- Configured in 4 groups of 2 outputs each.
- Supports a voltage range of 0–24 V AC RMS or 0–24 V DC.
- Fast switching performance with 1 ms maximum operate/release and bounce times.
- High isolation voltage: 1000 V between open contacts and 1500 V between coil and contact.
- Compact design for standard 1771 I/O chassis mounting.
Technical Specifications
| Model |
1771-OZL |
| Outputs per Module |
8 (4 groups of 2) |
| Contact Configuration |
8 Form A (N.O.) |
| Voltage Rating |
0–24 V AC RMS / 0–24 V DC |
| Current Rating |
100 mA per output |
| Switching Frequency |
10 Hz maximum |
| Backplane Current |
420 mA maximum |
| Operate/Release Time |
1 ms maximum |
| Bounce Time |
1 ms maximum |
Installation Guidelines
- Ensure the PLC-5 chassis power is disconnected before installing or removing the 1771-OZL module to prevent electrical damage.
- Verify the module is fully seated in the 1771 I/O chassis slot and secured with the locking tabs.
- Use appropriate shielded cabling for field wiring to minimize electromagnetic interference (EMI).
- Ensure field wiring is routed away from high-voltage AC lines and high-current power cables.
- Observe the 100 mA per output current limit to prevent relay contact degradation.
- Maintain adequate ventilation within the enclosure to ensure the module operates within its specified temperature range.
FAQ
What type of relay does the 1771-OZL use?
The 1771-OZL utilizes reed relays, which are ideal for low-current, high-speed switching applications where mechanical durability and fast response times are required.
Can this module be used for AC and DC loads?
Yes, the 1771-OZL is rated for both 0–24 V AC RMS and 0–24 V DC, making it versatile for various low-voltage signal control requirements.
