Time Delay Relays
Safety relays suitable for monitoring Emergency stops/Light Curtain/ Gate Interlocks with Delayed Outputs are available in OFF-Delay and ON-Delay formats. OFF-Delay Safety relays are used for de-energization of Frequency inverters/VSD’s prior to de-energization of redundant contactors/valves. ON-Delays are used in applications where power must be maintained for a fixed duration after an input signal is received. For example, driving a switch to maintain a guard door in the locked position for a fixed duration after a stop button is pressed.
Treotham offers a range of Wieland and Pilz Time delay relays. All safety relays are suitable for Safety Category 4/Pl e as per EN ISO 13849