Levelflex FMP50 HART
Electrical connection
Hauser
19
L
CAUTION
To ensure electrical safety:
‣
Do not disconnect the protective ground connection.
‣
Disconnect the device from the supply voltage before disconnecting the protective ground.
Connect protective ground to the inner ground terminal (3) before connecting the supply
voltage. If necessary, connect the potential matching line to the outer ground terminal.
In order to ensure electromagnetic compatibility (EMC): do
not
ground the device
exclusively via the protective ground conductor of the supply cable. Instead, the
functional grounding must also be connected to the process connection (flange or
threaded connection) or to the external ground terminal.
An easily accessible power switch must be installed in the proximity of the device. The
power switch must be marked as a disconnector for the device (IEC/EN61010).
Block diagram, 4-wire: 4 to 20 mA HART (90 to 253 V
AC
)
5
4
1
2
3
+
-
Y
I
6
3
4
L
N
1
2
7
A0036527
11
Block diagram, 4-wire: 4 to 20 mA HART (90 to 253 V
AC
)
1
Evaluation unit, e.g. PLC
2
Resistor for HART communication (≥ 250 Ω); observe maximum load
3
Connection for Commubox FXA195 or FieldXpert SFX350/SFX370 (via VIATOR Bluetooth modem)
4
Analog display unit; observe maximum load
5
Cable screen; observe cable specification
6
Measuring device
7
Supply voltage; observe terminal voltage, observe cable specification
6.1.2
Device plug
In the case of the device versions with a plug, the housing does not need to be opened to
connect the signal cable.
