eight_bools
Lifetime Supporting Member
I’ve got some devices that are triggered by shorting pins to common. There is 24 volts on each pin and right now I am using a relay output card in a SLC rack to do this now.
I think this is called BCD, as you can select a number up to 127 by combining relays.
I am putting together a new system with Point IO hardware and the most relay outputs I can find for the 1734 series is a 4 relay output card. So i would need 2x output cards per device which would add up quickly. I was wondering if a sinking output card would do the same thing. It’s my understanding that a sinking output would pull the output to the common terminal.
Anyone have any experience or advice on this? Title was supposed to be NPN, auto correct got me again.
I think this is called BCD, as you can select a number up to 127 by combining relays.
I am putting together a new system with Point IO hardware and the most relay outputs I can find for the 1734 series is a 4 relay output card. So i would need 2x output cards per device which would add up quickly. I was wondering if a sinking output card would do the same thing. It’s my understanding that a sinking output would pull the output to the common terminal.
Anyone have any experience or advice on this? Title was supposed to be NPN, auto correct got me again.