QJ71MT91 Mitsubishi MELSEC-Q Series MODBUS/TCP

MPN: QJ71MT91 · 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 QJ71MT91 be shipped?

QJ71MT91 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 QJ71MT91 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 QJ71MT91 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 QJ71MT91, subject to availability and destination.

The Mitsubishi Electric QJ71MT91 is a MODBUS/TCP in the MELSEC-Q Series. MODBUS ® /TCP master/slave function, 10BASE-T/100BASE-TX. 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/TCP
Sales status	2029/09 To be end of order (Mitsubishi Electric)
Outline	MODBUS ® /TCP master/slave function, 10BASE-T/100BASE-TX

Specifications

Transmission specifications: Data transmission speed	100BASE-TX: 100 Mbps 10BASE-T: 10 Mbps
Transmission specifications: Flow control	100BASE-TX: None(Full-duplex), Back pressure congestion control(Half-duplex) 10BASE-T: Back pressure congestion control(Half-duplex)
Transmission specifications: Transmission method	Base band
Transmission specifications: Maximum node-to-node distance	200 m
Transmission specifications: Maximum segment length	100 m
Transmission specifications: Number of cascaded connections	Maximum 4 stages (10BASE-T)/Maximum 2 stages (100BASE-TX)
Transmission specifications: Maximum number of connections	64 connections
Transmission specifications: Number of routers that can be set	1 default router + any 8 routers
Transmission specifications: Connector applicable to external wiring	RJ45
Master function: Automatic communication function: Number of slaves	64 slaves
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	Up to 8 instructions
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)	12 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	64
GX Developer connection function: Number of simultaneously connectable GX Developers	Maximum 8 GX Developers
Number of occupied I/O points	32 points (I/O assignment: Intelligent 32 points)
Internal current consumption (5 V DC)	0.52 A
External dimensions: Height	98 mm
External dimensions: Width	27.4 mm
External dimensions: Depth	90 mm
Weight	0.11 kg