Safety relay modules consist of safety relays which are controlled by built-in monitoring functions and ensure a trusted opening and closing for safety programs. Safety relay modules provide a high level of fail-safe operation for vital processes and protection.
 
These speed safety relays provide overspeed, underspeed and/or standstill detection for single - or three-phase motors by monitoring both external proximity sensors installed on a rotating element of the motor or load, the frequency of the motor power signal or the remanence voltage (back EMF) of the motor signal.
 
New Dold UH6932 speed monitor relay modules come with 2 PNP or NPN sensor inputs and 2 N.O. positively driven and 2 semiconductor monitoring outputs.
 
New Dold UH6937 frequency monitoring relay modules require no external sensors and provide 2 N.O. positively driven and 2 semiconductor outputs for monitoring.
 
The brand-new safety speed relay modules start at $380.00 and have a 1-year warranty.
 
This article is originally posted on tronserve.com