Control Relays

[Kolo]

Hi anyone who is reading this,

I was wondering what the difference is between a "Control Relay" and a conventional relay is?

As is, I believe the control relay requires a remote signal to turn it on/off and the conventional relay only requires power applied to the coil.

Cheers,

Thank you

 

[jbartos]

Suggestion: Reference:
1. IEEE Std 100 "Dictionary"
Control Relay:
Is an auxiliary relay whose function is to initiate or permit the next desired operation in a control sequence.
Conventional Relay:
It is not defined in Reference 1.

 

[automatic2]

Relays used in the 'control' portion of a circuit are control relays. It's their use, not their style. Relay logic was the norm prior to gate logic (aside from electrical valves). You'll find today that many heavy contactors have parallel aux contactors used in a control fashion. If the output of a relay produces no work, it is likely operating in a control function.

If you have electrical experince, you may also say that the low voltage circuit is control, while the high voltage side is drive.

 

[busbar]

Understand that there are significant differences in machine-tool control relays and vending-machine-grade [often having push-on connections or socket-based] devices. Specification depends on value of associated equipment, and cost of process interruption for malfunction(s). Machine-tool versions typically have replaceable contact cartridges and coils for varying switching/voltage/current levels. Consumer-appliance-type devices are (hopefully!) trashed if any part of the relay has failed or is intermittent.