VEGA VEGAFLEX 81 HART - integrated accumulator - Manual (Page 21)

21
5 Connecting to power supply
VEGAFLEX 81 • HART - integrated accumulator
44640-EN-130430
5 Connecting to power supply
5.1 Connection of the battery charger
We recommended charging the integrated accumulator completely
before setting up the instrument. You can find the charging time in
chapter "Technical data".
The battery charger is plugged into a socket in the supply room, see
chapter "Wiring plan".
The LEDs in the supply room show the charging process and condi-
tion of the accumulator, see chapter "Wiring plan".
If screened cable is necessary, connect the cable screen on both
ends to ground potential. In the sensor, the screen must be connected
directly to the internal ground terminal. The ground terminal on the
outside of the housing must be connected to the potential equalisa-
tion (low impedance).
If potential equalisation currents are expected, the connection on the
processing side must be made via a ceramic capacitor (e. g. 1 nF,
1500 V). The low-frequency potential equalisation currents are thus
suppressed, but the protective effect against high frequency interfer-
ence signals remains.
5.2 Wiring plan
2
1
Fig. 13: Position of the power supply and electronics compartment
1 Supply room (accumulator)
2 Electronics compartment
5 6 7 8
4...20mA
2
1 2 +
( ) (-)
1
Fig. 14: Electronics compartment, double chamber housing
1 Internal connection to the connection compartment
2 Contact pins for the display and adjustment module
Cable screening and
grounding
Overview
Electronics compartment