Mitsubishi , A1SJ71UC24-R2, RS-232-C Unit Module

Description:

The Mitsubishi A1SJ71UC24-R2 RS-232-C Unit Module is a communication interface module used in Mitsubishi MELSEC-A series PLC systems. Commonly installed in automation control racks to enable serial communication between PLCs and external devices such as HMIs, computers, and printers. Maintenance teams, OEMs, and system integrators use this module for replacement, retrofit, and reliable data communication in industrial automation systems.

Applications:

The Mitsubishi A1SJ71UC24-R2 RS-232-C Unit Module is used in industrial automation systems requiring serial communication, including manufacturing lines, data acquisition systems, machine control, and PLC-to-device integration. It is ideal for applications that demand stable data exchange, legacy system connectivity, and flexible communication with RS-232C-compatible equipment.

Technical Specifications:

• Brand: Mitsubishi
• Part Number: A1SJ71UC24-R2
• Product Type: Communication Module (RS-232-C Unit)
• Series: MELSEC-A / A1S Series
• Interface: RS-232C
• Channels: 1 communication channel
• Transmission Method: Half/Full duplex (configurable)
• Baud Rate: 300 to 19,200 bps
• Data Format: 7/8 data bits, parity selectable, 1–2 stop bits
• Connector Type: 9-pin D-sub (male)
• Transmission Distance: Up to 15 m (RS-232C standard)
• Mounting Type: Rack-mounted (PLC base unit)
• Application: Serial communication for PLC systems

Common Replacements:

• Mitsubishi AJ71UC24
• Mitsubishi A1SJ71C24-R2
• Mitsubishi QJ71C24N-R2