The AXM-IO modules add input/output options to the Acuvim II power meter. The table below shows which input/outputs are available on which modules:

Module	Digital In (DI)	Power for DI	Digital Out (DO)	Relay Out (RO)	Analog In (AI)	Analog Out (AO)
AXM-IO1	6	1		2
AXM-IO2	4		2			2
AXM-IO3	4			2	2

In addition, there are two communication modules for the Acuvim II - AXM-NET for ethernet communications and AXM-PROFI for PROFIBUS communication.

A total of 3 external modules can be stacked and used together with each Acuvim-II meter.