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MELSEC iQ-R Series

Serial Communication Modules

The serial communication module enables serial devices with up to 230.4 kbps transmission speeds to be connected per channel. Communications protocols such as MODBUS® are supported via the pre-defined protocol feature.

Item RJ71C24 RJ71C24-R2 RJ71C24-R4
Transmission speed (bps) 1.2k/2.4k/4.8k/9.6k/14.4k/19.2k/28.8k/38.4k/57.6k/115.2k/230.4k
MODBUS® communication function Slave function*1
CH1 RS-232 RS-232 RS-422/485
CH2 RS-422/485 RS-232 RS-422/485
Overall transmission distance
RS-232 (m) 15 15
RS-422/485 (m) 1200 1200
Firmware update*2
*1: Master function is supported with predefined protocol support function.
*2: For more information, please refer to the relevant product manual.