Product Page: SR4C - Time-delayed Safety Relay



SR4C is a safety relay, which combines the non-delayed and delayed contacts in an extremely compact housing. As a result, dangerous parts of a plant can be switched off quickly and safely during an emergency.

At the same time, other electric circuits can be supplied with power for up to 30 seconds, which might be essential for e.g. bringing a tool in the ideal position or effecting the declaration of trailing parts.

non-delayed contacts; delayed contacts

Feature Value
Safety function Emergency stop monitoring,
safety guard monitoring, light grids monitoring,
stop category 0/1
Certified according to EN 60204-1; EN ISO 13849-1 ; EN 62061
Approvals CE, TUV, UL
Supply voltage AC/DC 24 V
Number of safe relay contacts 4
Max. switching capability of safe relay contacts 8 A / 250 VAC resistive load
Number of auxiliary relay contacts -
Number of non time-delayed contacts 1 / 2 / 3
Number of time-delayed contacts 3 / 2 / 1
Adjustable time delay 1 - 30 s
Starting behavior Automatic start or manual, monitored start
PL; Cat.; SILCL (EN ISO 13849-1; EN 62061) PL e; Cat. 4; SILCL 3 - non-delayed contacts
PL e; Cat. 3; SILCL 2 - delayed contacts
Width 22.5 mm
Order No. fixed screw terminals 472232 (3 del.) / 472222 (2 del.) / 472212 (1 del.)
Order No. plug-in screw terminals 474232 (3 del.) / 474222 (2 del.) / 474212 (1 del.)
Order No. push-in twin spring connector 475232 (3 del.) / 475222 (2 del.) / 475212 (1 del.)
Order No. EKLS4; set of plug-in screw terminals 472592
Order No. EKLT4; set of push-in twin spring connector 472595
Order No. Spacer for a defined minimum distance between two safety relays (see derating) 472596


0.12% SVHC 4,4´-isopropylidenediphenol (because of 0.3% in Component Part)

Safety Notice:

Do not eat, drink or smoke when using. Wash thoroughly after use. Recycle whenever possible and dispose of item by following all applicable government regulations relevant to your geographic location.

Related Item / Accessories