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Mitsubishi Electric QJ71MT91 — PLC Communication Modules

Mitsubishi QJ71MT91 Modbus/TCP Module, 64k points, 64 slaves

MPNQJ71MT91

Mitsubishi QJ71MT91 Modbus/TCP Network Module, 64k points coil/input/register, 64 slaves, RJ45, 0.52 A.

$570.00Ref. price · indicative, final on quote
Mitsubishi Electric QJ71MT91 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

QJ71MT91 key specifications
ParameterValue
Product typeModbus/TCP Network Module
5VDC internal current consumption0.52A
MODBUS device sizeCoil : 64k points Input : 64k points Input Register : 64k points
Automatic communication functionNumber of Slaves (*3) : 64 slaves Input Area Size : 4k words Output Area Size : 4k words
Maximum number of connections (*2)64 connections
Connector applicable for external wiringRJ45
Weight0.11 Kg
Shipping weight1.5 Kg
CertificationUL • cUL • CE
Coil64k points
Input64k points
Input register64k points

All specifications

QJ71MT91 additional specifications
ParameterValue
Input area sizeMax. 253 bytes per instruction
Holding register64k points
Output area sizeMax. 253 bytes per instruction
Estimated lead timeUsually ships in 1-10 working days.
Dedicated instructionNumber of Instructions That Can Be Executed Concurrently (*4) : Up to 8 instructions Input Area Size : Max. 253 bytes per instruction Output Area Size : Max. 253 bytes per instruction
Number of slaves (*3)64 slaves
Extenden file registerMax. 4086k points
I (O device points occupied)32 points
Maximum segment length (*1)100m
Maximum Node-To-Node distance200m
Number of routers that can be set1 default router + any 8 routers
Number of simultaneously connectable MELSOFT PCsMax. 8
No. of simultaneously acceptable request messages64
Number of instructions that can be executed concurrently (*4)Up to 8 instructions

Product details

Lifecycle and certifications

The QJ71MT91: This module is in the mature stage of its product lifecycle, meaning it remains in ongoing production and support. It holds UL, cUL, and CE certifications, covering the typical compliance requirements for panel-mounted industrial automation gear in North America and Europe.

Sourcing posture

QJ71MT91 is available for quoted orders; typical lead time runs 1–10 working days from order confirmation. No official replacement or successor has been announced, so this module remains the current fit for new builds and spares alike. Submit an RFQ to confirm fit and availability against your BOM line.

Frequently asked questions

What are the Modbus data sizes supported?

The module supports 64k points each for coils, inputs, and holding registers.

What certifications does it carry?

UL, cUL, and CE certifications are listed.

How many Modbus slaves can be connected?

Up to 64 slaves are supported per module.

What is the maximum cable segment length?

100 meters per segment.

MPN
QJ71MT91