1785-L60B | Allen-Bradley PLC-5/60 Classic Processor Module

Product Overview

The Allen-Bradley 1785-L60B serves as a high-capacity processing core for the PLC-5 platform. This PLC-5/60 processor manages large-scale industrial operations by providing 64 Kilowords of battery-backed static RAM. It excels in complex environments requiring extensive distributed I/O and peer-to-peer networking. We supply this unit as 100% Brand New original factory stock, ensuring the internal architecture maintains peak performance for legacy system longevity and mission-critical reliability.

Technical Specifications

The 1785-L60B integrates powerful communication and memory management features:

Engineering Advantages

• Extensive Network Capability: Four on-board ports support Data Highway Plus (DH+) or Remote I/O (RIO) configurations. This allows the 1785-L60B to act as a scanner for remote racks or a peer on a plant-wide DH+ network, facilitating high-speed data exchange across large distances.

• Massive I/O Scalability: The processor manages up to 3072 I/O points across 24 racks. This capacity supports large-scale assembly lines and complex process control applications without requiring a transition to more expensive, modern platforms.

• High-Speed Execution: Advanced scan time capabilities (as low as 3 ms at 230.4 kbits/s) ensure responsive control over high-speed machinery. The dedicated control coprocessor expansion port allows for even further computational enhancement.

• Non-Volatile Security: While the RAM is battery-backed, the unit supports optional EEPROM modules. This enables hardware-based program backup, ensuring immediate system recovery and protection against intellectual property loss during extended power outages.

FAQs

• Q: Can I expand the memory of the 1785-L60B beyond 64K words?

• A: You can use the 1785-ME64 or other ME-series modules for program backup, but the processor's active runtime memory remains capped at 64K words.

• Q: Which battery does this processor require for memory retention?

• A: The 1785-L60B uses the 1770-XYC lithium battery. As we sell this unit as 100% Brand New, it includes a fresh battery, but we recommend checking the "Battery Low" LED on the front panel during routine maintenance.

• Q: Does this unit support RS-232 communication directly?

• A: Yes. The single 25-pin serial port supports RS-232, RS-423, and RS-422A standards. You can configure it for DF1 protocol to interface with HMIs, weigh scales, or non-Rockwell serial devices.

• Q: Is the 1785-L60B a direct replacement for an older PLC-5/40?

• A: Yes, the PLC-5/60 offers a larger memory capacity and higher I/O limits than the PLC-5/40. You can typically download an existing PLC-5/40 program into the 1785-L60B using RSLogix 5 after updating the processor type in the software.