• ambient temperature from -20 to +70 °С; • upper limit of relative humidity = max. 95% at 35°C and lower temperatures without moisture condensation; • atmospheric pressure from 84 to 106.7 kPa. In terms of resistance to mechanical influences during operation the device corresponds to group of performance N2 in GOST R 52931-2008. NOTICE It is necessary to comply with the requirements for operating conditions, as they are part of safety measures. 3 Safety measures CAUTION The terminal block has life-threatening voltage up to 250 V. Any connections to the device and maintenance work should be carried out only when the power is turned off.
By the method of protection from electric shock the device corresponds to class II according to GOST 12.2.007.0-75. While operating, maintaining and checking, it is necessary to comply with GOST 12.3.019-80, Rules of the technical operation of electrical consumers and Safety rules for operating electrical equipment. There must be no moisture on the output terminals and the internal components of the device. It is forbidden to use the device in corrosive environments with acids, alkalis, oils , etc. in the air. 10