QJ71MB91 Mitsubishi MELSEC-Q Series MODBUS

MPN: QJ71MB91 · Brand: Mitsubishi Electric (Factory Automation)

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

30-day returns, no restocking fee on unused parts

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Quick facts

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

Shipping & availability

When can QJ71MB91 be shipped?

QJ71MB91 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 QJ71MB91 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 QJ71MB91 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 QJ71MB91, subject to availability and destination.

The Mitsubishi Electric QJ71MB91 is a MODBUS in the MELSEC-Q Series. MODBUS ® RTU/MODBUS ® ASCII master/slave function RS-232, RS-422/485. Mitsubishi Electric has announced its discontinuation (2029/09 To be end of order) — plan spares now; PartnerPLC also sources it on the surplus market after the end of order. Specifications and manuals below are Mitsubishi Electric's own data.

Specifications

Product

Series	MELSEC-Q Series
Category	MODBUS
Type	RS-232/422/485
Sales status	2029/09 To be end of order (Mitsubishi Electric)
Outline	MODBUS ® RTU/MODBUS ® ASCII master/slave function RS-232, RS-422/485

Specifications

Transmission specifications: Interface	RS-232: 1 channel RS-422/485: 1 channel
Transmission specifications: Transmission speed	300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200 bps • Total transmission speed of two interfaces is available up to 115200 bps.
Transmission specifications: Transmission distance: RS-232	Up to 15 m
Transmission specifications: Transmission distance: RS-422/485	Up to 1200 m (overall distance)
Master function: Automatic communication function: Number of slaves	32 slaves per channel
Master function: Automatic communication function: Function (for send)	7 functions
Master function: Automatic communication function: Input area size	4K words
Master function: Automatic communication function: Output area size	4K words
Master function: Communication by dedicated instructions: Number of instructions that can be executed concurrently	1 per channel
Master function: Communication by dedicated instructions: Function (for send)	MBRW instruction: 9 functions MBREQ instruction: 19 functions
Master function: Communication by dedicated instructions: Input area size	Maximum 253 bytes per instruction
Master function: Communication by dedicated instructions: Output area size	Maximum 253 bytes per instruction
Slave function: Automatic response function: Function (for receive)	17 functions
Slave function: MODBUS ® device size: Coil	64K points
Slave function: MODBUS ® device size: Input	64K points
Slave function: MODBUS ® device size: Input register	64K points
Slave function: MODBUS ® device size: Holding register	64K points
Slave function: MODBUS ® device size: Extended file register	Maximum 4086K points
Slave function: No. of simultaneously acceptable request messages	1 request per channel
Slave function: Station No.	1...247
Number of occupied I/O points	32 points (I/O assignment: Intelligent 32 points)
Internal current consumption (5 V DC)	0.31 A
External dimensions: Height	98 mm
External dimensions: Width	27.4 mm
External dimensions: Depth	90 mm
Weight	0.20 kg