Electronic Neutral Zone Thermostat - ETZ
Industrial neutral zone thermostat for ON/OFF regulation.

PTC sensor for temperature measurement Compensation for sensor tolerances and wire resistance Several thermostats may be controlled by 1 sensor DC outputs for external regulation by PLC control Safeguarded in case of sensor failure Product Range Type Product EAN-Nr ETZ-1951  230V, -30/+30ºC   ETZ-1952  230V, +10/110ºC   ETZ-1953  230V, 0/+40ºC     Accessories   ETPD-x Analogue instrument available in 3 different scales   ETPP Ext. potentiometer unit for panel mount   ETF-..95 Temperature sensor of various types   UNITEMP FAMILY CONCEPT: UNITEMP is a designation for a series of electronic thermostats for regulation and monitoring of cooling and heating installations as well as industrial plants where accurate regulation is desired. The UNITEMP units make use of the same types of sensors and accessories. An external control unit ETPP may control 1 or 2 thermostats simultaneously, and regulation by external DC signal is possible, eg from a PLC control. The units are installed on DIN rails. FUNCTION For regulation of cooling/heating plants. 3 types cover a scale range from –30/+110ºC. The neutral zone is situated equally on either side of the set- point and may be adjusted from 0 to 10% of the scale range by means of the control knob ZONE. Controls The SET control serves to set the desired temperature. With a coin inserted into its slot the scale may be adjusted in accordance with a reference thermometer. Thus, a high accuracy throughout the entire scale is ensured. The DIFF control enables the neutral zone to be adjusted from 0,3 to 10% of the scale range. The SCALE ADJ control allows compensation for sensor tolerances and conductor resistance. In case of an error in the sensor circuit, the output relays will always fall out. Neutral zone distance: Scale range / Type Adjustable neutral zone Relay difference -30/+30ºC 0/+6ºC 0,5ºC 10/110ºC 0/+10ºC 0,8ºC 0/+40ºC 0/+4ºC 0,3ºC Technical data Power consumption 3V A Ambient temperature -20/+50ºC Accuracy ±1ºC Relay output 2 S.P.S.C., max. 6A, 250V resistive Expected lifetime 2X10 switch functions at max. load DC output 0,5-5,5V DC, Max. 20mA Dimension & weight Din rail mounting. Width 52.5mm and height above rail max. 56mm. Weight 190g Interconnections: An analogue instrument, type ETPD, may be connected to display the sensor temperature. Voltage outputs 0,5 to 5,5 VDC may be utilized for remote control and data transfer to PLC systems etc. The setpoint may be controlled externally via External Potentiometer, type ETPP. Relay functions: As long as the temperature measured is within the selected neutral zone, none of the relays will be active. If the temperature falls below the lower zone limit, relay 1 will be activated and a red LED indicates heating function. If the temperature rises above the upper zone limit, relay 2 will be activated and a green LED indicates cooling function.

ETZ Thermostat