A1SJ71QE71N-T Mitsubishi A1S Series QE71 Ethernet Module

Detailed Description A1SJ71QE71N-T is an Ethernet communication module for Mitsubishi MELSEC A1S series programmable logic controller. It is designed to be installed into the A1S main base rack, providing 10BASE-T twisted-pair Ethernet interface for data exchange between A1S PLC, upper computer, HMI and other network devices. It supports TCP/IP and UDP/IP protocols, widely used in old production lines, packaging machinery and process automation systems built on Mitsubishi A1S control platform.

This module supports fixed buffer communication and random access buffer communication, and can realize MC protocol communication for host computer to read/write PLC registers. It has built-in IP address, subnet mask and station number configuration via PLC programming software. Front panel LED indicators display RUN, LINK, ACT and error status, helping maintenance staff quickly judge network connection and module fault. It communicates with A1S CPU through the backplane bus, and supports data transmission between multiple A1S stations on the same Ethernet network.

The module adopts industrial plug-in structure, IP20 protection grade for cabinet installation, operating temperature range 0~55℃. It has built-in self-diagnosis function to detect hardware errors and network abnormal disconnection. It supports ping function to verify network connectivity. No external power supply is required; power is obtained directly from the PLC backplane bus.

A1SJ71QE71N-T is discontinued legacy Mitsubishi A1S PLC spare part. Many long-running factory automation systems still use A1S series PLC. When the original Ethernet module fails, replacing it with identical A1SJ71QE71N-T can reuse existing A1S rack, CPU, I/O modules and original PLC program. No program modification is required. Technicians insert the module into rack, set network parameters and test communication, so the whole control system resumes network connection rapidly and reduces production downtime.

Before shipment, every A1SJ71QE71N-T undergoes comprehensive functional inspection including power-on test, backplane bus communication verification, Ethernet link test, MC protocol read-write test and LED indicator check. All products come with 12-month warranty. Our automation technical team provides remote support for rack installation, network parameter setup and fault diagnosis. Fast global shipping is available for urgent maintenance orders.

For automation maintenance engineers and system integrators, A1SJ71QE71N-T is reliable spare Ethernet communication module for legacy Mitsubishi A1S PLC systems. It restores Ethernet data exchange of A1S control racks, extends service life of old automation assets and avoids high-cost whole control system upgrade.