Phoenix Contact 2904950

The PSR-MS20-1NO-1DO-24DC-SC is a safety relay specifically engineered for emergency stop applications and safety doors. It is rated up to SIL 1, Cat. 1, PL c, and can achieve up to SIL 3, Cat. 4, PL e depending on the specific application requirements. This device operates on a 1-channel basis and features an automatic start capability.

Designed for industrial environments, this relay utilizes an electromechanical relay with force-guided contacts, conforming to the standards set out in IEC/EN 61810-3. It operates with a control circuit supply voltage of 24 V DC and exhibits a typical response time of less than 175 ms. The relay supports a maximum power dissipation of 3 W under nominal conditions, with a rated insulation voltage of 250 V AC and a reinforced insulation rating of 6 kV between input circuits and enabling paths.

It has a compact design, measuring 6.8 mm in width, 93.1 mm in height, and 102.5 mm in depth, and can be mounted on DIN rails. The relay is equipped with a screw connection for conductor sizes ranging from 0.2 mm² to 2.5 mm². In terms of environmental specifications, it operates effectively within a temperature range of -40 °C to 60 °C and is rated IP20, with a minimum installation location protection of IP54.