Part 2

470 Plug-In Assembly ConfigurationDigital Output ModeTo configure the assembly for digital output mode, first decide whether to use theinternal + 5V pullup on the assembly or an external pullup. Figure 133 shows Sampleconfigurations for both internal and external pullup with 4.7K resistors used. Youcan select other values, but don't use less than 2K resistors.With either internal or external pullup (assuming a + 5V supply), the bit output ishigh (+ 5V) when the relay is closed (NO contact connected to COMMON) and low(OV) when the relay is opened (NC contact connected to COMMON). To connectinternal pullup resistors, see Figure 129. For example, to connect + 5V to channel0 NO contact, connect a 4.7K resistor across the top contacts of J1, etc.INTERNAL SUPPLYrNORM.(Al USING 1INTERNALPULL-UP BIT 15EXTERNAL SUPPLY0 RELAYOUTPUT[B) USING 1EXTERNALPULL-UP BIT 153497A-OPC-145Figure 133. Option 110 - Digital Output Mode ExampleArtisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com