Mitsubishi A3ACPUP21S3 — The A3ACPUP21S3 is an Optical Data Link Module from Mitsubishi's A Series

Part number	A3ACPUP21S3
Brand	Mitsubishi
Description	The A3ACPUP21S3 is an Optical Data Link Module from Mitsubishi's A Series
Manufacturer	Mitsubishi
Product Line	A Series
Part Number	A3ACPUP21S3
Weight	15.00 lbs (6.80 kg)
Module Description	Optical Data Link Module
Cable Used	GL-20/125
Max. Number of I/O Points	2048 points
Communication Speed	1.25 Mbps
Communication Method	Half-duplex bit serial method
Allowable Momentary Power Failure Time	1 within 20 ms
Synchronous Method	Frame synchronous method
Transmission Path Method	Duplex loop method
Overall Loop Distance	Max. 10 km (32,810 ft); Between Stations: 2 km (6,562 ft)
Number of Connected Stations	Max. 65 units/loop (1 master station and 64 local/remote I/O stations)
Demodulation Method	CMI method
Transmission Format	Conforms to HDLC (frame method)
RAS Function	Loopback function, diagnostic function
Connector	2-conductor optical connector plug (CA9003S)

The A3ACPUP21S3 is an Optical Data Link Module from Mitsubishi's A Series. Designed for robust communication, this module has a maximum capability of 2048 I/O points and operates at a speed of 1.25 Mbps.

Compatibility data for this part number is being verified. Send an RFQ with your equipment model and serial — our suppliers confirm fitment before quoting.

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