The 3SK1220-1AB40 is a safety relay input expansion module designed for monitoring single- or two-channel sensors with a 24 V DC control supply. It features screw terminals, supports floating and non-floating sensors, and enables cross-circuit detection, monitored startup, and emergency stop functions. The device is rated for a maximum power loss of 1.2 W and operates within an ambient temperature range of -25 °C to +60 °C. It meets IEC 62061 SIL 3 and ISO 13849-1 PL e for 2-channel configurations, with a PFHD of 1E-9 1/h. The unit has dimensions of 100 mm height, 17.5 mm width, and 121.5 mm depth, and uses screw terminals compatible with solid conductors of 0.5 to 2.5 mm². It is certified for UL approval, classified as IP20, and suitable for installation at altitudes up to 4,000 m. The enclosure provides finger-safe protection and supports snap-on and screw mounting in any position.
SAFETY RELAY ADV INPUT EXP,24VDC
| DigiKey | |
|---|---|
| Product Category | Safety Relays |
| Product Number | 3473-3SK12201AB40-ND |
| Product Name | Safety Relays |
| Channels | Single Throw |
