Installation
November 2014
AC_F110_BA_02_1346
Page 15
7.5
Terminal connectors
7.5.1
OVERVIEW
For installation, pay special attention to:
•
SEPARATED CABLE GLANDS WITH EFFECTIVE IP67 SEALS FOR ALL WIRES.
•
NOT USED CABLE ENTRIES: DO PLACE CLOSED IP67 PLUGS.
•
A RELIABLE GROUNDING OF THE SEVERAL COMPONENTS, ELECTRONICS AND - IF BE APPLICABLE - METAL CASING.
•
AN EFFECTIVE SCREENED CABLE FOR SIGNAL WIRING AND GROUNDING OF THE SCREENING IN TERMINAL 9 (GND). SEE
7.5.2
VOLTAGE SUPPLY FLOW METER PICK UP
Battery powered and loop powered applications:
A supply voltage of 3.2 Volt DC is available for the signal output of the flow meter. This voltage may not be used to power the
flow meters electronics, converters etc. as it is not a power output! All energy used by the flow meters pick-up influences the
battery lifetime directly; it is strongly advised to use a "zero power" pickup as a coil or reed-switch. It is possible to use a NPN
or PNP output signal, but the battery life time will be reduced.
Externally powered applications 5-30 VAC/DC:
When the F110 is powered with 5-30VAC/DC supply, it is possible to power the flow meters electronics with 3.2 Volt DC (max.
50mA). The type of pick-up does not influence the battery life time as long as the external power supply is available.
NAMUR:
For a NAMUR pick-up, an external power supply of 8.2-30VAC/DC is required. The voltage supply to the flow meter should be
according DIN19 234 (8.2VDC) when NAMUR-input is selected (see setup 51).
Pulse-
output
ext. power-
supply
5-30 VAC/DC
Analogue
Output
Sensor signal input
