Home / Mitsubishi Electric (Factory Automation) / Mitsubishi MELSEC iQ-R Series – Information/network / RJ71C24-R4 Mitsubishi MELSEC iQ-R Series MODBUS

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RJ71C24-R4 Mitsubishi MELSEC iQ-R Series MODBUS

MPN: RJ71C24-R4 · Brand: Mitsubishi Electric (Factory Automation)

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12-month warranty (new) · 3-month (used/refurbished)

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Quick facts

Availability	Confirmed on request
Category	Mitsubishi MELSEC iQ-R Series – Information/network
Lifecycle	Active
Warranty	12-month (new) · 3-month (used/refurbished)

Shipping & availability

When can RJ71C24-R4 be shipped?

RJ71C24-R4 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up RJ71C24-R4 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for RJ71C24-R4 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for RJ71C24-R4, subject to availability and destination.

The Mitsubishi Electric RJ71C24-R4 is a MODBUS in the MELSEC iQ-R Series. RS-422/485: 2 channels, transmission speed: 230.4 kbps with 2 channels. Specifications and manuals below are Mitsubishi Electric's own data.

Specifications

Product

Series	MELSEC iQ-R Series
Category	MODBUS
Type	RS-422/485
Outline	RS-422/485: 2 channels, transmission speed: 230.4 kbps with 2 channels

Specifications

Interface: CH1	RS-422/485-compliance (2-piece plug-in connector socket block)
Interface: CH2	RS-422/485-compliance (2-piece plug-in connector socket block)
Communication method: Line	Full-duplex/half-duplex communications
Communication method: MC protocol communication	Half-duplex communications
Communication method: Predefined protocol communication	Full-duplex/half-duplex communications
Communication method: Nonprocedural protocol communication	Full-duplex/half-duplex communications
Communication method: Bidirectional protocol communication	Full-duplex/half-duplex communications
Communication method: MODBUS communication	Half-duplex communications
Communication method: Simple CPU communication	Full-duplex/half-duplex communications
Synchronization method	Start-stop synchronization method
Transmission speed	1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200, 230400 bps
Transmission distance: RS-422/485	Maximum 1200 m (overall distance)
Data format: Start bits	1
Data format: Data bits	7/8
Data format: Parity bits	1 (vertical parity) or none
Data format: Stop bits	1/2
Access cycle: MC protocol communication	Processes one request during the END processing of the CPU module of the station with the C24.
Access cycle: Predefined protocol communication	Sends or receives data when requested with the dedicated instruction.
Access cycle: Nonprocedural protocol communication	Sends each time a send request is issued. Can receive at any time.
Access cycle: Bidirectional protocol communication	Sends each time a send request is issued. Can receive at any time.
Access cycle: MODBUS communication	Processes one request during the END processing of the CPU module of the station with the C24.
Access cycle: Simple CPU communication	Processes one request at a fixed cycle or on request.
Error detection: MC protocol communication: Parity check	Enabled
Error detection: MC protocol communication: Sum check	Enabled
Error detection: MC protocol communication: Horizontal parity	Disabled
Error detection: MC protocol communication: 16-bit CRC (for MODBUS)	Disabled
Error detection: MC protocol communication: LRC (for MODBUS)	Disabled
Error detection: Predefined protocol communication: Parity check	Enabled
Error detection: Predefined protocol communication: Sum check	Enabled
Error detection: Predefined protocol communication: Horizontal parity	Enabled
Error detection: Predefined protocol communication: 16-bit CRC (for MODBUS)	Enabled
Error detection: Predefined protocol communication: LRC (for MODBUS)	Disabled
Error detection: Nonprocedural protocol communication: Parity check	Enabled
Error detection: Nonprocedural protocol communication: Sum check	Enabled
Error detection: Nonprocedural protocol communication: Horizontal parity	Enabled
Error detection: Nonprocedural protocol communication: 16-bit CRC (for MODBUS)	Disabled
Error detection: Nonprocedural protocol communication: LRC (for MODBUS)	Disabled
Error detection: Bidirectional protocol communication: Parity check	Enabled
Error detection: Bidirectional protocol communication: Sum check	Enabled
Error detection: Bidirectional protocol communication: Horizontal parity	Disabled
Error detection: Bidirectional protocol communication: 16-bit CRC (for MODBUS)	Disabled
Error detection: Bidirectional protocol communication: LRC (for MODBUS)	Disabled
Error detection: MODBUS communication: Parity check	Enabled
Error detection: MODBUS communication: Sum check	Disabled
Error detection: MODBUS communication: Horizontal parity	Disabled
Error detection: MODBUS communication: 16-bit CRC (for MODBUS)	Enabled (RTU)
Error detection: MODBUS communication: LRC (for MODBUS)	Enabled (ASCII)
Error detection: Simple CPU communication: Parity check	Enabled
Error detection: Simple CPU communication: Sum check	Enabled
Error detection: Simple CPU communication: Horizontal parity	Disabled
Error detection: Simple CPU communication: 16-bit CRC (for MODBUS)	Enabled (RTU)
Error detection: Simple CPU communication: LRC (for MODBUS)	Enabled (ASCII)
Transmission control: RS-422/485: DTR/DSR control	Disabled
Transmission control: RS-422/485: RS/CS control	Disabled
Transmission control: RS-422/485: CD (DCD) signal control	Disabled
Transmission control: RS-422/485: DC1/DC3 (Xon/Xoff) control	Enabled
Transmission control: RS-422/485: DC2/DC4 control	Enabled
Line configuration for connection (Target device side : CPU module side): RS-422/485	1:1，1:n，n:1，m:n (The total number of 'n' or 'm+n' is up to 32.)
Line configuration for data communication (Target device side : CPU module side): RS-422/485: MC protocol communication	1:1，1:n，m:n (The total number of 'n' or 'm+n' is up to 32.)
Line configuration for data communication (Target device side : CPU module side): RS-422/485: Predefined protocol communication	1:1，n:1 (The total number of 'n' is up to 32.)
Line configuration for data communication (Target device side : CPU module side): RS-422/485: Nonprocedural protocol communication	1:1, 1:n, n:1 (The total number of 'n' is up to 32.)
Line configuration for data communication (Target device side : CPU module side): RS-422/485: Bidirectional protocol communication	1:1
Line configuration for data communication (Target device side : CPU module side): RS-422/485: MODBUS communication	1:1, 1:n (The total number of 'n' is up to 32.)
Line configuration for data communication (Target device side : CPU module side): RS-422/485: Simple CPU communication	1:1, 1:n (The total number of 'n' is up to 32.)
Number of occupied I/O points	32 points (I/O assignment: Intelligent 32 points)
Internal current consumption (5 V DC)	0.42 A
External dimensions: Height	106 mm (base unit mounting side: 98 mm)
External dimensions: Width	27.8 mm
External dimensions: Depth	110 mm
Weight	0.13 kg

Specifications

General specifications

Refer to the general specifications of the CPU module or remote head module.

Downloads & documentation

Official documents from Mitsubishi Electric (Factory Automation), downloaded directly from the manufacturer.

Data sheets & manuals

MELSEC iQ-R Serial Communication Module User's Manual (Startup) (SH-081250ENG-G)	PDF · 4.12MB
MELSEC iQ-R Serial Communication Module User's Manual (Application) (SH-081251ENG-M)	PDF · 22.28MB
MELSEC iQ-R Module Configuration Manual (SH-081262ENG-AU)	PDF · 44.18MB
MELSEC iQ-R MODBUS and MODBUS/TCP Reference Manual (BCN-P5999-1060-B)	PDF · 0.54MB
MELSEC iQ-R Serial Communication Module Function Block Reference (BCN-P5999-0379-G)	PDF · 0.53MB
MELSEC Communication Protocol Reference Manual (SH-080008-AB)	PDF · 6.70MB
Before Using the Product (BCN-P5999-0075E-D)	PDF · 0.19MB
Safety Guidelines (IB-0800525)	PDF · 11.79MB