General; Features; Operating Principle - KEM FAU 50 Manual

General

1. General
The FAU is a microprocessor-based unit to convert output frequencies of KEM-Amplifiers into an analogue
signal. You may chose between two signals:
0/4 to 20 mA potential-free load independent current signal
•
0/2 to 10 V potential-free voltage signal
•
Adjust the desired output signal via the external slide switch on the lefthand housing side (see chapter 4.2.7
and 5.2).
The FAU can scale your measuring values and display them as rate or totals. Special characteristics are:
• Short response time
High accuracy
•
Full and easy programming
•
1.1.

Features

LCD display
•
• Pulse divider
Two limits: flow-limit MIN, flow-limit MAX.
•
Potential-free limit switch outputs
•
• 1:1 frequency output
Detection of rotational direction
•
Reverse flow changes the polarity of the analogue output, resets the internal counter and activates
a switch output
Versatile inputs for active and passive pickups
•
1.2.

Operating Principle

An edge-controlled pulse width measurement combined with programmable time base function provides rapid
and stable measuring values. The FAU detects any alteration of the measuring value quickly and accurately.
Conversion, limits and divider are based on the measuring values. The FAU converts the input frequencies with
a resolution of 13 bit, the transmission behaviour is adjustable.
Your parameter settings and the internal counters of the FAU are maintained by a lithium battery when the is
unit turned off.
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Version: FAU_M_EN_170308_E004