Assembly Instructions 6
Characteristics MFE7:
• two galvanically isolated input safe circuits for HF- or LF pulse
sensor
• passive isolated pulse amplifier integrated in the inputs
• a galvanically isolated input safe circuit for the direction signal;
a passive isolated pulse amplifier integrated in the inputs
• max. input signal: 24 V DC
6 mA
• switching point
− > 15 V DC: (1)
− < 6.5 V DC: (0)
• max. input frequency: 5 kHz
• max. cable length depending on the operating mode:
− message: 500 m
− HF (up to 2 kHz): 250 m
− HF (up to 5 kHz): 100 m
Hints on parameterization
Branch <device> – Basic System – I/O boards –
Board <x>: MFE7
Set following values:
• channel D1+ GND: type HF pulse input channel A
− parameter Flow direction detection: value On
• channel D2+ GND: type HF pulse input channel B
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