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Chapter 4 I/O Processing > 4.2. Signal Conditioning - Pg. 81

I/O Processing 81 Digital Input (V) 00000000 00000001 00000010 00000011 00000100 00000101 00000110 00000111 00001000 etc. Analog Output (V) 0.00 0.04 0.08 þ 0.00 ¼ 0.08 0.08 þ 0.04 ¼ 0.12 0.16 0.016 þ 0.00 þ 0.04 ¼ 0.20 0.016 þ 0.08 ¼ 0.24 0.016 þ 0.08 þ 0.04 ¼ 0.28 0.32 Analog output modules are usually provided in a number of outputs, such as 4 to 20 mA, 0 to þ5 V DC, and 0 to þ10 V DC, and the appropriate output is selected by switches on the module. Modules generally have outputs in two forms, one for which all the outputs from that module have a common voltage supply and one that drives outputs with their own individual voltage supplies. Figure 4.11 shows the basic principles of these two forms of output. 4.2 Signal Conditioning