Intrinsic safety barriers БИЗоН 2Ex.24.12


BIZoN EX.24.12 is two-channel intrinsic safety barrier with automatic recovery function after tripping is designed to provide intrinsic safety of transducers and equipment installed in hazardous areas.

The “Power” channel is designed protect power supply circuitry for one device with current-loop 0-5 mA / 0-20 mA / 4-20 mA DC, or for one device installed in a hazardous area (up to +24V DC).

The “Signal” channel is designed for protection of signal circuitry of digital interfaces (e.g. RS-485/RS-422) or for protection of circuitry for transmitting discrete signals from equipment with a “dry contact” output, amplitude up to 10V DC.

Intrinsic safety barrier meets the requirements of EN 60079-0:2017 and EN 60079-11:2017, has explosion protection marking EX II (1) G [Ex ia Ga] IIB (designed for installation outside hazardous areas).

Intrinsic safety barrier - is the device that limits the energy supplied to a circuit and protects hazardous areas from excess energy. By limiting energy to a safe level, intrinsically safe circuits prevent the ignition of potentially explosive atmospheres.


The device is used in measurement and process control systems, emergency protection and alarm systems in explosive and/or hazardous areas of oil and gas & petrochemical, metallurgy, power, chemical, food and other industries, where explosive gas mixtures, vapors, other flammable and explosive substances (dust, powder) may be present.

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Intrinsic safety barrier БИЗоН 2Ex.24.12 meets the requirements:

Technical data

Parameter Power channel Signal channel
Channels count 1 1
Max supply voltage 25 V 10 V
Max supply current 50 mА 40 mА
Channel resistance 210 Оhm 190 Оhm
Max. external capacitance Co 0.4 uF 3.5 uF
Max. external inductance Io 1 mH 4.5 mH
Max. output voltage Uo 27 V 12.75 V
Max. output current Io 165 mА 90 mА
Explosion-proof marking Ex II (1) G [Ex ia Ga] IIB
Conformance EN 60079-0:201б, EN 60079- 11:2017
Degree of protection IP20
Ambient temperature (operation) -20...+60 °С
Relative humidity (operation) < 80 % (non-condensing)
Assembly instructions 35 mm DIN rail mounting
Dimensions 111 х 99 х 17.6 mm
Net weight 100g
Connection data Phoenix Contact; screw connection; conductor cross section: 0.2-2.5 mm2



Delivery set (typical)

# Name pcs.
1 IS Barrier БИЗоН-2Ex-24.12 1
2 Passport 1
3 User Manual 1