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DI 301 input circuit

DI 301 input circuit

‎10-23-2006 09:43 AM

is the input circuit of a DI 301 equiped with a pull down resistor ?.
May you give me technical information concerning the circuitry ?.

Thank you
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Re: DI 301 input circuit

‎10-24-2006 01:45 PM

Spec sheet states that input impedance for DI-301 is 5K ohms.  User manual shows a wiring diagram with a switch on the input.  The only way a digital input can handle an open condition without latching up is if it has an internal pulldown of some sort.  Not sure what all the internal circuitry looks like exactly, but I'd guess that it's overall effect is a 5K pulldown.
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