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Automation FAQ Sponsored by Creative Control Concepts |
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 Home Automation FAQ : HA Equipment : Creative Control Concepts/HCS-II : RBUF-Term Relay/Buffered I/O Board :
Can I change the RBUF-Term so inputs and outpus are not inverted? |
| Yes. The RBUF-Term uses pulled up inputs so it considers a 0V input as a 1 and a +V input (ie pulled up) as a 0. This can be confusing. To change this inverting behavior on an RBUF-Term, replace the 74LS240 ICs with 74HCT244 ICs These ICs are non-inverting and the HCT versions have a much higher current capacity to drive the status LEDs.
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