A1SJ71AT21B Mitsubishi MELSECNET(II)/B data link module

MPN: A1SJ71AT21B · Brand: Mitsubishi Electric (Factory Automation)

Price on request

Discontinued by Mitsubishi Electric (Factory Automation) — we can still source the original A1SJ71AT21B (new, used or refurbished, subject to availability). Request a quote below.

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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 I/OLINK, MELSECNET & A-Series Network Modules
Lifecycle	Discontinued
Warranty	12-month (new) · 3-month (used/refurbished)
Recommended replacement	QJ71NT11B, QJ71BR11, QJ71LP21-25

Shipping & availability

Can I still buy the A1SJ71AT21B now that it is discontinued?

Yes. Mitsubishi Electric (Factory Automation) has discontinued the A1SJ71AT21B, but sourcing discontinued parts is what PartnerPLC specialises in — new old stock, used and refurbished units. Request a quote and we'll confirm availability, condition and lead time. If you are planning an upgrade instead, Mitsubishi Electric (Factory Automation) names the QJ71NT11B as its successor — we can quote both.

When can A1SJ71AT21B be shipped?

A1SJ71AT21B 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 A1SJ71AT21B 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 A1SJ71AT21B 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 A1SJ71AT21B, subject to availability and destination.

Mitsubishi Electric A1SJ71AT21B — MELSECNET(II)/B data link module, MELSEC-A Series network / I/OLINK. Discontinued by Mitsubishi Electric. Mitsubishi names QJ71NT11B, QJ71BR11 as alternative. PartnerPLC sources discontinued and surplus Mitsubishi MELSEC parts — request a quote for price, condition and lead time.

Specifications

Product

Lifecycle	Discontinued by Mitsubishi Electric
Series	MELSEC-A Series network / I/OLINK
Product type	MELSECNET(II)/B data link module
Mitsubishi technical bulletin	FA-A-0142-C
Mitsubishi alternative model(s)	QJ71NT11B, QJ71BR11, QJ71LP21-25

Transition notes to QJ71NT11B (Mitsubishi)

Note 1	It is recommended to replace the MELSECNET (II) and
Note 2	MELSECNET/B data link system with the MELSECNET/H network
Note 3	system.
Note 4	When both a local station and a remote I/O station exist, the PLC to
Note 5	PLC network and remote I/O network are respectively required for
Note 6	these stations.
Note 7	To replace the system gradually with the existing MELSECNET (II)
Note 8	used, it is recommended to use the A1SJ71A23(B)Q, a
Note 9	MELSECNETII local station module.