Mitsubishi A3ACPUR21 — The A3ACPUR21 is an Optical Data Link Module from Mitsubishi's A Series, designed for effective communication in automation systems

Part number	A3ACPUR21
Brand	Mitsubishi
Description	The A3ACPUR21 is an Optical Data Link Module from Mitsubishi's A Series, designed for effective communication in automation systems
Manufacturer	Mitsubishi
Product Line	A Series
Part Number	A3ACPUR21
Weight	0.94 lbs (0.43 kg)
Name	Optical Data Link Module
Connector	BNC-P-5, BNC-P-3NI (DDK) equivalent
Cable used	3C-2V, 5C-2V equivalent
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 (32810 ft) (between stations: 0.5 km (1640.5 ft))
Number of connected stations	Max. 65 units/loop (1 master station, 64 local/remote I/O stations)
Demodulation method	CMI method
Transmission format	Conforms to HDLC (frame method)
RAS function	Loopback function, diagnostic function

The A3ACPUR21 is an Optical Data Link Module from Mitsubishi's A Series, designed for effective communication in automation systems. It supports a maximum of 2048 I/O points and operates at a communication speed of 1.25 Mbps, utilizing a half-duplex bit serial method.

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.