G
George Shaw
- Jan 1, 1970
- 0
Folks
I am looking for ideas for the following, and of course though some of
you would have a few ideas.
I need to attach a Data Logger device to a series of relays. There is
not always spare contacts on the relays and I can NOT add wires to the
existing relays. The logger simply records change of state form say
de-energised to energised (open-closed, picked-dropped, No - Nc, power
on power off) switching at the moment via the negative wetting voltage
supplying spare contacts that mirror the actions of the ones being
monitored.
I am looking for a Cheap induction type clamp on device (up to 38
channels need to be monitored so each logger will require 38 of the
devices). The inputs to the logger are + and - with logging taking
place when a voltage is applied or dropped (+ V detected = Bit 1, - V
detected bit 0 change from bit 1 to 0 = change in state). I am happy
to build such devices or to purchase if cost is within reason.
Any ideas or products/designs circuits welcome.
I am looking for ideas for the following, and of course though some of
you would have a few ideas.
I need to attach a Data Logger device to a series of relays. There is
not always spare contacts on the relays and I can NOT add wires to the
existing relays. The logger simply records change of state form say
de-energised to energised (open-closed, picked-dropped, No - Nc, power
on power off) switching at the moment via the negative wetting voltage
supplying spare contacts that mirror the actions of the ones being
monitored.
I am looking for a Cheap induction type clamp on device (up to 38
channels need to be monitored so each logger will require 38 of the
devices). The inputs to the logger are + and - with logging taking
place when a voltage is applied or dropped (+ V detected = Bit 1, - V
detected bit 0 change from bit 1 to 0 = change in state). I am happy
to build such devices or to purchase if cost is within reason.
Any ideas or products/designs circuits welcome.