Mitsubishi A1SJ71LP21 — MELSECNET/10 Network Module

Part number	A1SJ71LP21
Brand	Mitsubishi
Category	Communication Module
Description	MELSECNET/10 Network Module
Manufacturer	Mitsubishi
Product Type	MELSECNET/10 Network module
Product Line	A Series
Part Number	A1SJ71LP21
Weight	0.44 lbs (0.20 kg)
No. of occupied I/O points	32 points (I/O assignment: 32 points as special)
Maximum link points per network	8192 points
Communication speed	10Mbps (equivalent to 20Mbps for multiple transmission)
Communication method	Token ring
Synchronization method	Frame synchronization
Transmission route format	Duplex optical loop
Transmission format	Conform to HDLC (frame format)
Maximum number of networks	255 (The sum total of PLC to PLC network and remote I/O network)
Maximum number of groups	9 (Only for PLC to PLC network)
Applicable connector	2-core optical connector plug
5VDC current consumption	0.65 A

The Mitsubishi A1SJ71LP21 is a MELSECNET/10 Network module with a capacity of 32 occupied I/O points (special assignment: 32 points). It supports up to 8192 maximum link points per network, operating at a 10Mbps communication speed (equivalent to 20Mbps for multiple transmissions). Using a token ring communication method and frame synchronization, it employs NRZI encoding. Its transmission...

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Data compiled from 1 verified source. Last reviewed 2026-08-16.