Hi all,
I'm trying to use a 18V priority encoder to retrieve the status of 8 sensors on 4 pins of a PLC. The problem is that the encoder becomes really hot when I connect the Vdd and Vss. I'm using a CD4532BE encoder. This IC has a maximum supply voltage of 18V which suffices for my PLC pins as they will trigger at 15V. To reduce my 24V supply I'm using a 7818ACT voltage regulator, with on both sides 220nF capacitors between supply and ground.
I measure a resistance over Vdd and Vss of 144.4 ohm, which seems a bit low to me. Can anyone explain whether I'm doing something wrong?
Kind regards,
Kanter
I'm trying to use a 18V priority encoder to retrieve the status of 8 sensors on 4 pins of a PLC. The problem is that the encoder becomes really hot when I connect the Vdd and Vss. I'm using a CD4532BE encoder. This IC has a maximum supply voltage of 18V which suffices for my PLC pins as they will trigger at 15V. To reduce my 24V supply I'm using a 7818ACT voltage regulator, with on both sides 220nF capacitors between supply and ground.
I measure a resistance over Vdd and Vss of 144.4 ohm, which seems a bit low to me. Can anyone explain whether I'm doing something wrong?
Kind regards,
Kanter