Siemens Digital Industrial Safety Relay 3SK1220-1AB40

Manufacturer: Siemens Digital Industrial Safety Relay
Designation: Safety Relay
Expansion Device Type: 3SK1220-1AB40
Design: Other
Suitable for monitoring position switches: Yes
Suitable for monitoring emergency stop circuits: Yes
Suitable for monitoring valves: No
Suitable for monitoring optoelectronic protective devices: Yes
Suitable for monitoring magnetic switches: Yes
Type of electrical connection: Screw connection
DIN rail mounting possible: No
Rated control supply voltage Us at DC: 24 V
Type of voltage for actuation: DC
With removable terminals: No
Input evaluation: Single-channel and dual-channel
With start input: Yes
With muting function: No
With feedback circuit: No
Stop category according to IEC 60204: 0
Performance Level according to EN ISO 13849-1: Level e
SIL according to IEC 61508: 3
With approval for BG BIA: No
With UL approval: Yes
Width: 17.5 mm
Height: 100 mm
Depth: 121.6 mm
With TÜV approval: Yes

The safety relay 3SK1220 is an input expansion for an additional dual-channel or two single-channel sensors with Us = 24 V DC and screw connection. The sensor expansion 3SK1220 allows for easy and flexible integration of additional sensors into the 3SK system without additional wiring effort between devices. The device monitors two single-channel or one dual-channel sensor regardless of the type of its outputs (potential-free or potential-bound). The devices are available with screw or spring-loaded connections. The safety relays 3SK replace the proven series 3TK28. Safety is a SIRIUS business.