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Zener diode barrier MTL 7787

Mã sản phẩm: MTL 7787+
Nhà Sản Xuất:

Tival-sensors

Tài liệu hướng dẫn Download
Working voltage (Vwkg)
 The greatest steady voltage, of appropriate polarity, that
 can be applied between the safe-area terminal of a ‘basic’
 barrier channel and earth at 20°C for the specified leakage
 current, with the hazardous-area terminal open circuit.

Description
All MTL7700 Series barriers are based on the same simple
principle. Each channel contains two stages of pulse-tested
Zener or forwardconnected diodes and an ‘infallible’ teminating resistor. In the event of an electrical fault in the
safe area, the diodes limit the voltage that can reach the
hazardous area and the resistor limits the current. A fuse
protects the diodes, and the two stages of voltage limitation
ensure continued safety if either stage should fail. No active
outputcurrent limiting circuits are employed. All models are
certified ‘ia’ for all zones and ‘IIC’ for all explosive atmospheres (except MTL7707P+ and MTL7729P+, 'ia' 'IIB')

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