MS40ZT, PTC-Resistor-Relay with time monitoring, AC 220-240 V, for elevators

PTC-Resistor-Relay for elevators, with time monitoring

The PTC-resistor relay MS 40 ZT monitors particularly engines at elevator cars and lifts. A pulse input monitors the movement of the elevator car as long as the motor is switched on.

• watchdog timing adjustable 5 - 50 s.
• temperature monitoring with PTC-resistor
• integrated RESET-button
• LED for temperatur alarm
• LED for watchdog alarm

At elevator systems the temperature of the motor and the travelling motion have to be monitored. With the car at rest and contact between terminals 2 and 5 closed, the integrated relay picks up (terminals 8, 9 connected). The time monitoringstarts with the opening of the contact between terminals 2 and 5. Then the pulse input between terminals 3 and 6 must continously open and closeduring travelling motion. When the pulse stops or the nominal response temperature of the PTC-resistor is exceeded, the relay releases. Each disconnection is locked. A restart by pressing the RESET-button is only possiblewith closed contact between terminals 2 and 5 and low-resistive sensor.

Technical Data