MultiTek Thermistor Trip Relay
| SELECTION GUIDE M200- TTA Automatic reset M200-TTM Manual reset TYPICAL APPLICATIONS The M200 thermistor trip accepts positive temperature coefficient thermistor inputs. Typically used to monitor temperature in motor windings. When the thermistor is below its predetermined temperature the resistance is low and the M200-TTA / TTM relay is energised. A green LED indicates the safe condition. When the temperature exceeds the predetermined temperature, the resistance of the thermistor rapidly increases, this increase in temperature is detected by M200-TTA/TTM and the relay is de-energised. The M200-TTM is manually reset. Once the relay has de- energised it will stay de-energised regardless of the temperature being monitored. The relay can only be reset via the reset push button on the front of the unit. The M200- TTA automatically resets once the temperature has dropped below the trip point. A yellow LED is provided to indicate the condition of the power supply. OPTIONS 1. AC auxiliary in the range 57.7 to 480 volts 2. Calibration at temperature other than 23 C |
TECHNICAL SPECIFICATION INPUT Positive temperature coefficient thermistors <1500 Ohms max at nominal temperature. Sensors can be connected in series but 1500 ohm must not be exceeded. Trip point 2500-3500 Ohms Reset point 1500-2300 Ohms Total resistance of sensor loop 1500 Ohms max at nominal temperature Differential Fixed 5% Repeatability Better than 5% of range RESET M200-TTA Automatic M200-TTM Manual via push switch on front of product AUXILIARY AC Voltage 115/230/400V ± 25% / 45-65Hz / 2VA DC Voltage 24 volt (± 20% / non isolated) <3 watt WEIGHT & CASE SIZE Approx. 0.3kg 55mm case ORDERING INFORMATION Product Code Aux Freq Options M200-TTA 230V 50Hz |