Overview
The Allen-Bradley 1761-L32BWA Series E is a MicroLogix 1000 programmable logic controller (PLC) designed for compact, cost-effective industrial automation and discrete control. Manufactured by Allen-Bradley (Rockwell Automation), this controller integrates a power supply, input/output channels, 1K EEPROM memory, and an integrated RS232 communication port in a single compact chassis. The 1761-L32BWA is commonly deployed in small-scale machine control, equipment automation, and process monitoring applications where reliability and simplicity are priorities.
Key Features
- 32 I/O points: 20 DC sinking inputs and 12 relay outputs
- Wide AC power range: 85 to 264 volts AC at 47 to 63 Hertz
- Nonvolatile memory: 1K EEPROM storage with approximately 437 data words and 737 instruction words
- Built-in communication: Integrated RS232 port for peer-to-peer connection
- Flexible mounting: Can be mounted horizontally or vertically
- High relay durability: 50,000 minimum power cycle rating for reliable contact output switching
Technical Specifications
- Input voltage: 85–264V AC at 47–63 Hz
- Discrete inputs: 20 × 24V DC sinking
- Relay outputs: 12 × rated 24–125V DC / 120–240V AC
- Output contact rating: 2A maximum at resistive loads
- Memory: 1K EEPROM (437 data words, 737 instruction words)
- Operating temperature (horizontal): 0–55°C
- Operating temperature (vertical): 0–40°C
- Dimensions: 7.87 × 2.87 × 3.15 inches
- Mounting: DIN rail or screw mounting
- Terminal torque rating: 0.9 Nm maximum per terminal
Typical Applications
The MicroLogix 1000 was introduced as an economical PLC solution for small automation tasks, with 32 total I/O points in a compact chassis that prioritizes simplicity and offers reliable on/off control without advanced analog capabilities. Common uses include:
- Small machine and standalone equipment control
- Discrete process automation and monitoring
- Relay logic replacement and modernization
- Industrial OEM control panels
- Backup and legacy system maintenance
Compatibility & Replacements
Compatible With
- DF1 serial protocol over RS232
- DH485, DeviceNet, and Ethernet/IP networks via interface converters (1761-NET-AIC, 1761-NET-DNI, 1761-NET-ENI, 1761-NET-ENIW)
- RSLinx Classic and modern communication drivers
- Modern PanelView Operator Terminals such as PanelView 800, PanelView Plus, and PanelView Plus 5000
- Standard Rockwell Automation programming software (RSLogix 500)
Replaces / Drop-In Replacement For
- 1761-L32AWA (Series A/B variant)
- 1761-L32BWB (24V DC powered variant)
- Other MicroLogix 1000 catalog numbers: 1761-L32BBB
Works With
- RSLogix 500 programming environment
- 1761-HHP-B30 Hand-Held Programmer
- 1761-CBL-PM02 and 1761-CBL-HM02 communication cables
- OPC (OLE for Process Control) drivers and SCADA systems
- Allen-Bradley data-logging and supervisory control platforms
