
20F1AND361AA0NNNNN A-B Digital Input Module
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IN STOCK20F1AND361AA0NNNNN A-B Digital Input Module
32-Point I/O Modules To use 32-point I/O modules with 1-slot addressing, you must install, as a pair, an input module and an output module in two adjacent slots (even/odd pair) of the I/O chassis, beginning with I/O slot 0. If you cannot pair the modules in this way, one of the two slots of the pair must be empty. For example, if I/O slot 0 holds a 32-point input module, I/O slot 1 must hold an 8-, 16-, or 32-point output module (or a module using the backplane for power only); otherwise the slot must be empty. Using 1/2Slot Addressing When you select 1/2-slot addressing, the processor addresses one-half of an I/O module slot as one I/O group. Each physical slot in the chassis corresponds to two input and two output image-table words. The type (unidirectional or bidirectional) and density of the module that you install determines the number of bits that are used in each word. You can mix 8-, 16- and 32-pt I/O modules in any order in the I/O chassis because 32 input bits and 32 output bits are available in the image table for each I/O slot. When you use 8- and 16-pt I/O modules with 1/2-slot addressing, however, you use fewer total I/O bits in our image table.
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