Hi Guys,
I am requiring a 8 channel relay board with TTL input opto isolated with input. The device needs to be non latching ie when the TTL input is logic high the relay is on for as long as it is logic high. The relays are not required to switch any real current as the application I have is supplying a revertive back to the M1 (Zone input) from a contactor unit I have in the pool enclosure.
I am controlling 8ch contactor via an M1 relay card however the contactor input is momentary to latch and the a possiblity that the on and off can get out of sync. The contactor control provides a LED confirmation which I will use drive the opto isolated relay board. I simply disconnect the LED's and I have a logic TTL tally which I will use to drive the relay one when the contactor is on. Then write a rule that forces the state of each contactor to mirror the required on or off state.
If anyone knows of a useful source of a 8ch opto isolated TTL driven unit would appreciate hearing from you. It could be a PCB or in a housing either way I can accomodate it, it can be 5V or 12V relays again easily accomodated.
Cheers,
Fleetz
I am requiring a 8 channel relay board with TTL input opto isolated with input. The device needs to be non latching ie when the TTL input is logic high the relay is on for as long as it is logic high. The relays are not required to switch any real current as the application I have is supplying a revertive back to the M1 (Zone input) from a contactor unit I have in the pool enclosure.
I am controlling 8ch contactor via an M1 relay card however the contactor input is momentary to latch and the a possiblity that the on and off can get out of sync. The contactor control provides a LED confirmation which I will use drive the opto isolated relay board. I simply disconnect the LED's and I have a logic TTL tally which I will use to drive the relay one when the contactor is on. Then write a rule that forces the state of each contactor to mirror the required on or off state.
If anyone knows of a useful source of a 8ch opto isolated TTL driven unit would appreciate hearing from you. It could be a PCB or in a housing either way I can accomodate it, it can be 5V or 12V relays again easily accomodated.
Cheers,
Fleetz