Product Overview
The 1775-L4 is a CPU module specifically developed for the Allen-Bradley PLC-3 control platform. Serving as the central processing unit, it executes control programs, manages data tables, and coordinates communication with I/O modules and system peripherals.
This processor is specifically designed for early industrial automation systems and is commonly used in long-term operational installations where system stability and compatibility are paramount. Its architecture supports deterministic scan cycles, making it suitable for applications requiring stable logic execution rather than high-speed processing.
Functional Characteristics
PLC-3 Chassis Central Processing Unit
Executes ladder logic programs and system instructions
Manages I/O mapping tables and internal data memory
Designed for continuous operation in fixed installations
Products Description
| Parameter | Specification |
|---|---|
| Product Type | CPU Module |
| Series | Allen-Bradley PLC-3 |
| Processor Type | Microprocessor-based CPU |
| Programming Method | Ladder Logic |
| Memory Type | Internal RAM with battery backup |
| I/O Communication | PLC-3 backplane |
| Scan Execution | Deterministic cyclic scan |
| Operating Voltage | Supplied via PLC-3 chassis |
| Operating Temperature | 0…60 °C |
| Storage Temperature | −40…85 °C |
| Mounting | PLC-3 rack-mounted |
| System Compatibility | PLC-3 series only |
Typical Application Scenarios
Legacy manufacturing lines using PLC-3 systems
Process control systems with stable logic requirements
Industrial facilities retaining their original control architecture
Retrofit projects requiring replacement of the original CPU
Frequently Asked Questions
Common Problem
Is the 1775-L4 compatible with PLC-5 systems?
No. The 1775-L4 is designed exclusively for PLC-3 systems and cannot operate in a PLC-5 rack.
Can existing PLC-3 programs be reused with this CPU?
Yes. Programs developed for PLC-3 systems will run on the 1775-L4 without modification.
Does this module require a backup battery?
Yes. The battery preserves memory contents during power loss.
How does it communicate with I/O modules?
Communication occurs via the PLC-3 backplane, coordinating data exchange with installed I/O cards.
Industrial Automation Experts
Company Introduction – PLC Export
Established Automation Supply Capability
Leveraging our distributed warehouse network and experienced global logistics system, we ensure the continuous operation of traditional automation platforms by maintaining a steady supply of critical PLC-3 components and guaranteeing timely order delivery.
Practical Solutions for Legacy Systems
We consolidate hard-to-find automation parts into a unified procurement channel, helping customers extend the lifespan of existing control systems while reducing replacement costs and minimizing downtime.
Reach Out to Us
Sales Contact: Lydia
Email: sales3@mooreplc.com
WhatsApp: +86 180 2071 4662
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