( full specifications are in the manual for the device )
1. The intrinsically safe barrier BI-4 is designed as a separating device between electrical circuits
hazardous and non-hazardous areas of digital measuring transducers (SMART sensors) with current output signals or
other devices with digital signal processing and to ensure the reception/transmission of data according to the Bell202 standard between the specified
devices and secondary means of measurement and control located in the explosion-proof zone.
2. The BI-4 barrier has input intrinsically safe electrical circuits of the "ib" level and
explosion protection marking II (2)G [Ex ib] IIB Gb, meeting the requirements of GOST 12.2.007.0, GOST 22782.0, GOST 22782.5 and
it is intended for installation outside explosive zones of rooms and external installations.
3. The characteristics of the received electrical signals and those generated by the barrier correspond to the characteristics of the coded (digital)
Bell202 standard signal with frequency modulation.
4. Serial products, as well as Certified devices (availability of a Type Examination Certificate) can be connected to the BI-4 barrier
on explosion protection and permits for use in Ukraine, made with the type of explosion protection "intrinsically safe electrical circuits"
according to GOST 22782.5 with protection level "ib", as indicated by the "X" sign in the explosion protection marking of the barrier.
5. The value of the permissible electrical parameters of the external load such devices should be no more than the total
inductance and capacitance of the connecting line and their own barrier parameters BI-4.
1. The BI-4 barrier provides electrical power to devices located in the explosive zone using an external DC power supply
with an output voltage ranging from plus 15 to plus 28 V, for each connected device:
- DC voltage is not less than . . . . . . . . - 12 V
- direct current no more than . . . . - 100 mA
2. The operation of the barrier is allowed under the following conditions:
ambient air temperature from minus 40 to 60 °С
- relative humidity up to 98% at 35 °C
3. Overall dimensions are not more than . . . . . . . . - 91 x 35 x 60 mm
4. The mass of the barrier does not exceed . . . . . - 0.1 kg
5. The service life of the BI-4 barrier is not less than . . . . . - 12 years.
The intrinsically safe barrier BI-4.
Type Examination Certificate. Intrinsically safe barrier BI-4
Notice of type conformity based on quality assurance of the production process
Type-examination Certificate.(Intrinsically safe barriers BI-4 . . . )