Safety Monitoring Relays with Time Delay. Various output configurations (see below)
IDEM’s SCR-4-TD range are all purpose safety monitoring relays that combine time delayed and non time delayed contacts in a compact 22.5mm housing.
This permits dangerous components of a system to be switched off quickly and safely, whilst at the same time other circuits are still supplied with voltage for up to 30 seconds (adjusted on the SCR-4-TD by a potentiometer).
If the application requires time delayed opening of a safety circuit following activation of the stop signal then the SCR-4-TD range will provide combination of instant and variable delayed contacts.
This may be useful for applications that rely on PLC control to provide an initial controlled shutdown but ultimately requires a delayed opening of safety circuit.
SCR-4-TD-1 with Instant 3NC and Delayed 1NC
SCR-4-TD-2 with Instant 2NC and Delayed 2NC
SCR-4-TD-3 with Instant 1NC and Delayed 3NC
Force Guided Safety output Contacts:
Standards: EN60204-1, EN954-1, ISO13849-1, EN62061.
Stop Category: 0 (non time delayed) 1 (time delayed).
Up to Category 4 to EN954-1.
Up to PLe to ISO13849-1.
SILCL 3 EN62061.
Single or Dual Channel input with LED indication of input status.
Redundancy cycle monitoring.
Feedback loop for monitoring contactors or expansion modules.
Short circuit and earth fault monitoring.
22mm Din Rail Mounting.
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