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The 1769-L31 is a CompactLogix 5331 processor for standalone machinery control and small-scale process automation. It provides a cost-effective entry into the Logix platform, using a common programming framework for easy code development and hardware integration.
Equipped with dual RS-232 ports, it communicates with HMIs, barcode scanners, or legacy DF1 networks, and manages up to 8 local 1769 I/O modules on a single DIN rail.
| Specification | Details |
|---|---|
| I/O Capacity | Up to 8 local 1769 modules (single bank) |
| User Memory | 512 KB non-volatile memory |
| Communication Ports | 2 x RS-232 Serial (Channel 0 & 1) |
| Supported Protocols | DF1 (Full/Half Duplex), DH-485, Modbus RTU via user logic |
| Task Management | 4 tasks (1 periodic, 3 event-based), up to 32 programs per task |
| Power Supply Compatibility | 1769-PA2 / 1769-PB2 / 1769-PA4 / 1769-PB4 |
| Current Draw | 510 mA @ 5V DC |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Dimensions | 118 × 70 × 87 mm |
| Weight | 0.41 kg |
Ideal for small-scale automation requiring serial communication with legacy devices, point-to-point HMIs, or barcode systems. Compact design allows full I/O on a single DIN rail without extra chassis.
Does the 1769-L31 support Ethernet/IP?
No. For Ethernet connectivity, use a 1761-NET-ENI module or upgrade to an "E" series processor (L32E or L35E).
What is the maximum I/O bank capacity?
Up to 8 modules in a single bank; expansion to additional banks is not supported.