Product Summary
This ControlNet PLC-5 processor powers large I/O networks with 48 kilowords of battery-backed RAM and robust 2048 forcible I/O. The 1785-L46C15 controls field devices reliably across 1771 chassis.
Product Procurement & Buyer Guide
Procurement teams require exact specs for system compatibility. The 1785-L46C15 integrates easily with ControlNet at 5 Mbit/s. It draws only 3.0 amperes from the backplane at 5V DC.
Engineers value its protected memory for critical code. This processor supports 60 universal remote I/O chassis. It also allows up to 125 total I/O chassis in a network.
The module offers a ControlNet hot backup cartridge option. This ensures system redundancy without costly downtime. You can use it with common I/O modules like 1771 or 1794.
Compliance with UL, CE, CSA, and C-TICK eases global installation. The controller operates from 0 to 60°C at 5-95% humidity. Its open-style enclosure tolerates 30G shock and 1G vibration.
Purchasing this unit reduces risk with proven Allen-Bradley reliability. The 1785-L46C15 is a solid choice for plant floor upgrades. It balances memory, I/O capacity, and network speed effectively.
Expert Technical Evaluation & Performance Review
The 1785-L46C15 delivers deterministic control via ControlNet with 0.5 ms scan time. Its remote I/O scan varies from 10 ms to 3 ms per rack. This speed suits high-speed material handling and process lines.
Protected memory prevents accidental overwrites of critical logic. The 48K word limit per data table file enforces efficient programming. Battery-backed SRAM retains program across power cycles without loss.
Analog I/O handling reaches 2048 forcible and 48000 nonforcible points. This flexibility supports both simple sensors and complex analog arrays. The coprocessor port enables advanced control algorithms or custom functions.
Thermal dissipation is only 59 BTU/hour, keeping cabinets cool. The unit weighs just 1.42 kg, easing panel mounting. It supports half, single, or double slot addressing for flexible I/O mapping.
Engineers can rely on its RS-232/422/423 port for programming or HMI. The front panel pins 40-42 and 54-56 ensure proper chassis keying. Overall, this processor offers high performance for mid-size control applications.
