MSR220K6, PTC-Resistor-Relay, 6 Channels, Reset, AC/DC 24-240 V, 1 change-over contact

MSR220K6, PTC-Resistor-Relay, 6 Channels, Reset, AC/DC 24-240 V, 1 change-over contact
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  • T221958
short-circuit-monitoring 1 change-over-contact Electronic reclosing lock more

PTC-Resistor-Relay, 6 PTC-Circuits


The MSR220K6 monitors up to 6 PTC-resistors sets with up to 6 PTCs each at the same time. If a temperature rise occurs in one set, the output relay releases and LEDs show the overheated sensor. Switching-off is stored until a Reset. Thus enables to find the overheated sensor even when it has cooled down.

With the MSR220K6 only 4 mm space is needed per monitored PTC-circuit. It is especially suitable for monitoring drives with multiple motors, like cranes or robots. Instead of the PTC-sensors also contacts (normally closed) can be connected.

  • 6 PTC-resistor sets, each 1...6 PTC
  • Monitoring of short-circuit of sensor
  • Output relay 1 x change-over contact
  • Electronic reclosing lock (disconnectible with bridge)
  • Input for external RESET
  • Automatic RESET at voltage recovery
  • LED for power on (green)
  • 6 LEDs for display of overheated sensor
  • Universal supply voltage AC/DC 24-240 V


Technical data


Rated supply voltage Us


AC/DC 24 - 240 V, AC 19 - 264 V, DC 20 - 297 V, ≤ 2 VA


Connectable PTC resistors


6 x 1...6 PTC according to DIN VDE V 0898-1-401 (formerly DIN 44081/82)


Switching point


< 4000 Ω


Output relay


change-over-contact (co)


Type of contact


Type 2 (see general technical information)


Test conditions


see general technical information


Rated ambient temperature


-20...+55 °C


Dimensions h x w x d


Design K: 75 x 22.5 x 115 [mm]




on 35 mm DIN rail according to EN 60 715 or screws M4 (option)


Protection Housing/Terminals






approx. 145 g

Input / measuered parameter: Measuring input PTC
Outputs: Alarms/relays
Design: Mount in switchgear cabinet
Approvals: UL/CSA
Extras: ≥ 4 sensor inputs, Reclosing lock
Applications: Protection of motors, Protection of pumps, Heat and power plants