Block of power relays BR4-I fig. 1

Relay unit BR4-I (BR4-I) is designed to control sound and light signalling devices, various automation devices within the integrated security system "Strelets-Integral". For data exchange in the BR4-I uses a network interface ISB S2.BR4-I version 1 is designed to control power automation systems.BR4-I has an external fault monitoring input ("FLT"), the state of which is controlled by the resistance of the external circuit as follows: resistance within 4 to 7 kOhm - the state of "Normal"; resistance of 10 kOhm or more or 2.8 kOhm or less - the state of "Fault". BR4-I is powered from an external DC source with voltage of 9-27 V with the possibility of controlling the main and backup power supply. The average service life of BR4-I is not less than 8 years. Overall dimensions of BR4-I are 210×143×38 mm. The weight of BR4-I is not more than 0,3 kg.