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FW-F011-P-M_v0404_01_EN.docx
Risk of damage to equipment!
Be very careful when connecting the common ground of the system to Protective Earth (PE).
Connecting the common ground to Protective Earth (PE) (especially when multiple power
supplies are connected) can cause ground loop currents that could damage the equipment.
See paragraph 4.5.2: Protective Earth (PE) connections for more information.
4.7.2
TERMINALS 5-7: FLOWMETER INPUT
Three basic types of flowmeter signals can be connected to the F011-P: pulse, active pulse or coil.
The screen of the signal wire can be connected to the common ground terminal. See paragraph 4.5.
The input signal type has to be selected with the correct SETUP-function (read chapter 3.3).
On terminal 7, the internal or external sensor supply is available. To configure the sensor supply,
see paragraph 4.5.5: Sensor supply for details.
Coil-signal
The F011-P is suitable for use with flowmeters which have a coil output signal.
Two sensitivity levels can be selected with the SETUP-function:
•
COIL LO: sensitivity from about 90mVp-p.
•
COIL HI: sensitivity from about 20mVp-p.
•
Type ZF (option): offers for setting COIL HI : sensitivity from about 10mVp-p.
•
Type ZG (option): offers for setting COIL HI : sensitivity from about 5mVp-p.
Fig. 23: Terminal connections - Coil signal input.
Pulse-signal NPN / NPN-LP
The F011-P is suitable for use with flowmeters which have a NPN output signal. For reliable pulse
detection, the pulse amplitude has to go below 1.2V. Signal setting NPN-LP employs a low-pass
signal noise filter, which limits the maximum input frequency (read chapter 3.3).
Fig. 24: Terminal connections - NPN signal input.