Mitsubishi A1S38B MELSEC-A PLC Base Unit A2USHCPU-S1 A1S62DA RS-232 NET

Mitsubishi A1S38B MELSEC-A PLC Base Unit A2USHCPU-S1 A1S62DA RS-232 NET

This is a Mitsubishi MELSEC-A Series A1S38B programmable logic controller base unit, fully populated with eight I/O and communication modules. The A1S38B is an 8-slot slim-line base unit from Mitsubishi's MELSEC-A series, designed to house the CPU, power supply, and peripheral modules required for a complete PLC control system. This listing includes the base unit plus all installed modules as described below.

Specifications & What's Included

• Base Unit: Mitsubishi A1S38B MELSEC-A Series, 8-slot
• Qty 1 – A1S61PN: MELSEC-A power supply module
• Qty 1 – A2USHCPU-S1: MELSEC-A CPU unit with RUN/ERROR LEDs and key switch (key included)
• Qty 2 – A1SX42: Input units (16-point DC input modules), labeled A0–F channels
• Qty 2 – A1SY42: Output units (16-point transistor output modules), labeled A0–F channels
• Qty 1 – A1S62DA: 2-channel D/A converter unit (CH1, CH2) with OFFSET/GAIN/UP/DOWN adjustment controls
• Qty 1 – A1SJ71UC24-R2: RS-232-C serial communication unit with RUN/SD/RD/CPU LEDs and protocol indicators (NEU, ACK, NAK, C/N, P/S, PRO, SIO)
• Qty 1 – A1SJ71PT32-S3: MELSEC NET/MINI-S3 network communication unit with RUN/SD/RD/WR LEDs and LOOP/REM indicators
• Qty 1 – A1SG60: Blank/dummy module (slot cover)
• Key switch key included with CPU module
• Country of Manufacture: Japan

Applications

The Mitsubishi MELSEC-A series is a line of modular programmable logic controllers widely used in factory automation and industrial process control. The A1S38B slim-line base is designed for compact panel installations and accommodates the full range of MELSEC-A CPU, I/O, and intelligent function modules. This particular configuration — with a high-performance A2USHCPU-S1 CPU, digital I/O modules, a D/A analog output converter, RS-232-C serial communications, and MELSEC NET/MINI-S3 networking — is suited to machine control and process automation applications requiring both discrete I/O and analog output alongside serial and network communications. The MELSEC-A series was introduced in the 1980s and remained in widespread production and service through the 1990s and into the 2000s, becoming a standard platform in Japanese and international manufacturing facilities. These systems are commonly sought today for maintenance, spare parts, and legacy system support in plants where MELSEC-A infrastructure remains in service. The A2USHCPU-S1 is one of the more capable CPU units in the A-series family, supporting high-speed processing and a large program capacity.