Hi everyone,
As I red in forum: 24VDC vs. 24VAC (1) 24VDC vs. 24VAC | Automation & Control Engineering Forum both have advantages and disadvantages.
Lately I have been building some large BMS control cabinets with 40 to 50 relays to control light systems and pumps, and many other things. And made them with 24 VAC due to price, but I always like to privilege 24 VDC.
Do you think I can supply the controller with 24VDC and make a separate 24VAC circuit for the relays? Probably yes for the digital outputs (because I have in CAREL NO/NC contacts), but what about the digital inputs?
I use CAREL controllers, and these require me to connect the digital input to the neutral of the 24VAC or the negative of the 24VDC to the digital input, to confirm the circuit is closed.
Any suggestions or comments?
Thanks.
Juan
As I red in forum: 24VDC vs. 24VAC (1) 24VDC vs. 24VAC | Automation & Control Engineering Forum both have advantages and disadvantages.
Lately I have been building some large BMS control cabinets with 40 to 50 relays to control light systems and pumps, and many other things. And made them with 24 VAC due to price, but I always like to privilege 24 VDC.
Do you think I can supply the controller with 24VDC and make a separate 24VAC circuit for the relays? Probably yes for the digital outputs (because I have in CAREL NO/NC contacts), but what about the digital inputs?
I use CAREL controllers, and these require me to connect the digital input to the neutral of the 24VAC or the negative of the 24VDC to the digital input, to confirm the circuit is closed.
Any suggestions or comments?
Thanks.
Juan