Mitsubishi QJ71C24N Serial Communication Module

Mitsubishi QJ71C24N | Serial Communication Module

Specifications

• Channels: CH1 = RS‑232 (D‑Sub 9‑pin); CH2 = RS‑422/485 (terminal block)
• Communication Modes: Full‑duplex / Half‑duplex; MC protocol; Non‑procedural; BidirectionalMITSUBISHI ELECTRIC
• Transmission Speed: 50–230,400 bps (max 230.4 kbps on CH1; total ≤230.4 kbps)
• Distance: RS‑232 = 15 m max; RS‑422/485 = 1200 m max
• Data Format: 1 start bit; 7/8 data bits; even/odd/no parity; 1/2 stop bits
• Buffer: 4 KB send / 4 KB receive per channel
• Handshaking: DTR/DSR, RTS/CTS (RS‑232)
• Isolation: 500 VAC (channel‑to‑channel, system‑to‑external)
• Backplane Power: 5 VDC @ 0.3–0.5 A
• I/O Points: 32 points (occupied)
• Operating Temp: 0 °C to +60 °C
• Dimensions (W×H×D): 27 × 98 × 90 mm approx.
• Weight: 0.15 kg
• Certifications: UL, cUL, CE (EMC/RoHS), KC, DNV, ABSMITSUBISHI ELECTRIC

Key Features

1. Dual‑port design: RS‑232 + RS‑422/485 in one module
2. High‑speed communication: up to 230.4 kbps, supports large data exchange (960 words via MC protocol)
3. Multi‑protocol support: MC protocol, Modbus RTU, non‑procedural (custom)
4. Extended distance: RS‑422/485 up to 1200 m for long‑range links
5. Industrial reliability: isolation, surge protection, wide temperature range

Applications

• Connect PLC to HMI, SCADA, barcode readers, printers, PCs
• Serial data exchange in factory automation, packaging, material handling
• Long‑distance communication via RS‑422/485
• Programming and monitoring Q‑series PLCs via RS‑232