Description
Allen-Bradley 1761-L32AWA PLC Controller
Product Dimensions:
The Allen-Bradley 1761-L32AWA belongs to the MicroLogix 1000 family. Although this series has been matured by Rockwell Automation in favor of the Micro800 or MicroLogix 1400 lines, it remains a staple in legacy systems due to its legendary reliability and compact “all-in-one” design.
1. Product Description
The 1761-L32AWA is a compact, fixed-I/O programmable logic controller (PLC). It is designed to handle basic control logic in environments where space is premium and high-speed complexity isn’t required. The “fixed” nature means the I/O count is built-in and cannot be expanded with additional modules.
2. Technical Specifications
The model number reveals the core hardware DNA:
| Feature | Specification |
| Input Power | 120V/240V AC |
| Total I/O | 32 Points |
| Inputs | 20 Digital (120V AC) |
| Outputs | 12 Relay Outputs |
| Memory | 1K EEPROM (approx. 73 instructions) |
| Communication | RS-232 port (DF1 or DH-485 protocols) |
| Mounting | DIN Rail or Panel Mount |
3. Key Advantages
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Cost-Effective: Ideal for simple “replace-the-relay” applications without the overhead of modular systems.
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Durability: Known for surviving harsh industrial electrical environments for decades.
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Simplicity: Uses RSLogix 500 software, which is highly intuitive for engineers familiar with ladder logic.
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Compact Footprint: High I/O density for a small physical size.
4. Considerations & Precautions
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Lifecycle Status: This product is officially Discontinued/End-of-Life. Finding new units usually requires surplus stock vendors; otherwise, you should consider migrating to a Micro820 or MicroLogix 1400.
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Non-Expandable: If your project grows and requires 33 inputs, you cannot add a module; you must replace the entire PLC.
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AC Input Latency: Since the inputs are 120V AC, they have a slower response time compared to 24V DC inputs—not suitable for high-speed motion sensing.
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Communication Bridge: To connect to modern USB-only laptops, you will need a specialized 1761-CBL-PM02 cable and a high-quality USB-to-Serial adapter.
5. Applications
The 1761-L32AWA is typically found in standalone machinery that requires simple logic:
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Material Handling: Small conveyor belt systems and diverters.
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Packaging: Bagging machines or simple labeling stations.
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HVAC Control: Basic pump sequencing and fan control.
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Water Treatment: Simple valve actuation and level monitoring.
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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