MTL7787+ Barrier

Brand: Status Instruments

The 7787+ barrier contains two stages of pulse-tested Zener or forward-connected diodes and an ‘infallible’ terminating 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 output-current limiting circuits are employed.

The MTL7787+ is certified ‘ia’ for all zones and ‘IIC’ for all explosive atmospheres.

Specifications

Ambient Temperature Range

  • -20° to 60° C (-4° to 140° F)

Applications

  • Transmitters Controller Outputs, Switches

Approvals & Certifications

  • CE
  • CSA
  • Ex
  • FM

Electrical Rating

  • 50 mA at 27.2 V, Maximum

Environmental Protection

  • Hazardous Area

Load

  • 250 ohms

Operating Voltages

  • 26.6 V at 10 µA or 1 µA

Output

  • 4-20 mA

Supply Voltage

  • 26 V

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