KOYO ELECTRONICS SR-20-4128 CPU MODULE PROGRAMMABLE CONTROLLER J-03

KOYO ELECTRONICS SR-20-4128 CPU MODULE PROGRAMMABLE CONTROLLER (J-03)

The KOYO ELECTRONICS SR-20-4128 is a CPU (Central Processing Unit) module for the DirectLOGIC SR-20 series of micro programmable logic controllers (PLCs).

Here is a detailed product description combining technical specifications and SEO-friendly content:

Technical Overview & Product Description

1. Core Function:
This module is the “brain” of the SR-20 PLC system. It executes the user-programmed ladder logic, controls all connected I/O (Input/Output) modules, and manages communication.

2. Key Model Specifications (SR-20-4128):

• SR-20 Series: A compact, rack-based micro-PLC designed for cost-effective automation of small to medium-sized machines.

• CPU Model 4128: The “4128” indicates the specific CPU type with 128 discrete I/O points (a mix of inputs and outputs, configurable with added I/O modules) and standard onboard features.

• Memory: Typically includes a fixed amount of user program memory (e.g., 4K words) and data memory.

• Onboard I/O: Most SR-20 CPUs, including this model, come with a set of built-in digital inputs (24VDC) and relay or transistor outputs.

• Expansion: Controls a local expansion rack, allowing the addition of various specialty I/O modules (analog, high-speed counters, communication adapters, etc.).

• Communications:

  • Standard RS-232 programming/communication port (for connecting a programming terminal/PC).

  • Capable of supporting KOYO’s proprietary networks (e.g., DirectNET) and optional adapters for others.

• Programming: Programmed using DirectSOFT programming software (or compatible software) using standard ladder logic.

3. The “J-03” Suffix:
The J-03 designation typically refers to a specific hardware version, revision, or region-specific model (often indicating a Japanese market or 100VAC power supply variant). It is crucial to verify power requirements:

• SR-20-4128 J-03 likely operates on 100-120 VAC power.

• Other common variants include A-03 (200-240 VAC) and D-03 (24 VDC).

This is a genuine KOYO (now JTEKT) DirectLOGIC SR-20-4128 CPU Module, a versatile micro programmable logic controller (PLC). Identified by the J-03 suffix, this unit is designed for 100-120VAC power systems.

Ideal for: Machine automation, process control, conveyor systems, packaging equipment, and as a direct upgrade or replacement for existing SR-20 PLC systems.

Key Features & Benefits:

• Compact & Powerful: A space-saving solution with 128 I/O capacity and robust control capabilities.

• Fully Expandable: Add digital, analog, and special function I/O modules to tailor the system to your exact needs.

• Industry-Standard Programming: Uses easy-to-learn ladder logic, programmable with KOYO’s DirectSOFT software.

• Built-in Communications: Features an RS-232 port for easy connection to HMIs, SCADA systems, or programming PCs.

• High Reliability: Designed for demanding industrial environments.