Y301 Serial I/O Modules

Each Y301 SKU follows the Y301-<DI><DO><AI><AO> convention (e.g., Y301-222 = 2DI + 2DO + 2AI). When a position exceeds 9, hexadecimal-style letters are used per the legend below.

Code	Meaning
0–9	0–9 DI/DO/AI/AO
A	10 DI/DO/AI/AO
G	16 DI/DO/AI/AO
W	32 DI/DO/AI/AO

Relay Output I/O Modules

	Model	DI	DO	AI	AO	Specification	Technical Manual
	Y301-220	2	2	0	0	Spec	Tech
	Y301-222	2	2	2	0	Spec	Tech
	Y301-440	4	4	0	0	Spec	Tech
	Y301-444	4	4	4	0	Spec	Tech
	Y301-880	8	8	0	0	Spec	Tech

Standard I/O Modules

	Model	DI	DO	AI	AO	Specification	Technical Manual
	Y301-110	1	1	0	0	Spec	Tech
	Y301-200	2	0	0	0	Spec	Tech
	Y301-020	0	2	0	0	Spec	Tech
	Y301-600	6	0	0	0	Spec	Tech
	Y301-800	8	0	0	0	Spec	Tech
	Y301-00G	0	0	16	0	Spec	Tech
	Y301-0004	0	0	0	4	Spec	Tech
	Y301-0006	0	0	0	6	Spec	Tech
	Y301-0008	0	0	0	8	Spec	Tech