The BIZ-21 intrinsic safety barrier is a specialized device designed to ensure explosion-proof connection of sensors installed in hazardous (explosive) zones to control and monitoring systems located in a safe area.

💡 The BIZ-21-AO1 barrier is intended for signal protection of:

• Direct current signals: 0–5 mA
• DC voltage signals: 0–10 V
• Discrete signals powered by 24 VDC with a maximum continuous switching current up to 10 mA
• Digital interface: RS-485

​​​⚙️ Key Features:

• Protection of signal lines (input/output) between safe and hazardous zones
• Galvanic isolation between zones
• Limitation of current and voltage to levels incapable of causing sparks or heating that could ignite a hazardous atmosphere

The BIZ-21 intrinsic safety barrier is a specialized device designed to ensure explosion-proof connection of sensors installed in hazardous (explosive) zones to control and monitoring systems located in a safe area.

💡 The BIZ-21-AO2 barrier is intended for signal protection of:

• Direct current signals: 0–20 mA
• Direct current signals: 4–20 mA

​​​⚙️ Key Features:

• Protection of signal lines (input/output) between safe and hazardous zones
• Galvanic isolation between zones
• Limitation of current and voltage to levels incapable of causing sparks or heating that could ignite a hazardous atmosphere 

When ordering, it is necessary to pay attention to the maximum contact resistance of the sensor/actuator - its value should not exceed the permissible limits of the BIZ-21-AO2 barrier. If it is higher, the barrier will limit the input/output.

The BIZ-21 intrinsic safety barrier is a specialized device designed to ensure explosion-proof connection of sensors installed in hazardous (explosive) zones to control and monitoring systems located in a safe area.

💡 The BIZ-21-T01 barrier is intended for signal protection of:

• Resistance thermal transducers (three-wire circuit)

​​​⚙️ Key Features:

• Protection of signal lines (input/output) between safe and hazardous zones
• Galvanic isolation between zones
• Limitation of current and voltage to levels incapable of causing sparks or heating that could ignite a hazardous atmosphere 

The BIZ-21 intrinsic safety barrier is a specialized device designed to ensure explosion-proof connection of sensors installed in hazardous (explosive) zones to control and monitoring systems located in a safe area.

💡 The BIZ-21-T02 barrier is intended for signal protection of:

• Resistance thermal transducers (four-wire circuit)

​​​⚙️ Key Features:

• Protection of signal lines (input/output) between safe and hazardous zones
• Galvanic isolation between zones
• Limitation of current and voltage to levels incapable of causing sparks or heating that could ignite a hazardous atmosphere 

The BIZ-21 intrinsic safety barrier is a specialized device designed to ensure explosion-proof connection of sensors installed in hazardous (explosive) zones to control and monitoring systems located in a safe area.

💡 The BIZ-21-T02 barrier is intended for signal protection of:

• Thermocouple

​​​⚙️ Key Features:

• Protection of signal lines (input/output) between safe and hazardous zones
• Galvanic isolation between zones
• Limitation of current and voltage to levels incapable of causing sparks or heating that could ignite a hazardous atmosphere