Eaton Electrical user manual D77A a Q 16, Catalog Numbering System

Intelligent Technologies (IT.) D77A I/O Module Products

Catalog Numbering System

Catalog numbers have three or five groups of characters, depending on the kind of module the catalog number represents. The catalog numbering system used for IT. D77A I/O modules is illustrated as follows:

For discrete digital and analog I/O, the first four positions in the first group indicate the product family. The next two places in the second group indicate the I/O type. The third group uses one or two places to indicate the number of points in the module. The last group is used only for combination modules.

Table 2: Catalog Numbering System

D77A - A Q 16 XX

Product Line Prefix							Expansion Module
D77A = I/O Module Products						DQ8 (DC Output, 8 Points)
						RQ8 (Relay Output, 8 Points)
						AQ8 (AC Output, 8 Points)
		I/O Type
	A = AC
	D = DC			Number of Points
	R = Relay		2		= 2 Points
	N = Analog		4		= 4 Points
			8		= 8 Points
			16		= 16 Points
		Input or Output
		I = Input
		Q = Output

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