Allen-Bradley 1785-V40L/A PLC-5 Processor Module

Configured for high-capacity discrete and analog automation control in PLC-5 chassis architectures, the Allen-Bradley 1785-V40L/A, also cataloged as the 1785-V40L PLC-5 Processor Module, provides direct physical and electrical execution for program instruction processing and large-scale I/O network coordination.

Suffix Breakdown & Model Matrix

Hardware Specifications

Backplane Bus Communication Velocity and Firmware Compatibility

Configured for high-speed industrial network execution, the module maintains strict backplane bus communication velocity and deterministic data exchange across distributed PLC-5 racks. Firmware flash compatibility, integrated Data Highway Plus (DH+), and dual Remote I/O (RIO) ports manage multi-chassis polling and peer-to-peer communication at selectable transmission rates (57.6 kbps, 115.2 kbps, and 230 kbps) without introducing communication latency or timing jitter into the control loop.

Frequently Asked Questions

Q: What communication ports are available on the 1785-V40L/A processor module?

A: The processor features an RS-232 serial port along with two dedicated Data Highway Plus (DH+) or Remote I/O ports for multi-chassis networking and device communication.

Q: Can this processor module be inserted or removed while the chassis backplane is energized?

A: No, system rack power must be fully isolated and de-energized prior to installing or extracting the processor module to prevent electrical arcing, data corruption, or backplane pin damage.

Field Installation Guidelines

Ensure all system power feeds and rack voltages are fully isolated and locked out prior to handling or mounting the 1785-V40L/A processor module. Secure the 3.00 lbs module firmly into the designated primary slot of the PLC-5 chassis backplane, ensuring proper mechanical guidance and engaging the locking latches. Terminate DH+ communication cables and serial lines securely, verifying that all cable shields are grounded properly to the cabinet earth bar to mitigate electromagnetic interference and maintain network signal integrity.