User's Manual

DRAFT
Micropilot FMR51, FMR52
Endress+Hauser V. 1, Rev. 8, 4-10-2012 23
4-wire: 4-20mA HART (90 to 253 V
AC
)
3
1
+
L
4
2
4...20 mA
HART
90...253 V~
10 mm
Spare part
71108xxx
2- wire
4-20 mA
HART
[09]
open
-
N
A
13
12
11
910
+
-
2 3
4
6
7
8
5
1
4...20 mA
³ W250
A0018965
å 7
Terminal assignment 4-wire; 4-20mA HART (90 to 253 VAC)
1
Evaluation unit, e.g. PLC
2
HART communication resistor (³250 W): Observe maximum load (® ä 29)
3 Connection for Commubox FXA195 or FieldXpert SFX100 (via VIATOR Bluetooth modem)
4
Analog display device: Observe maximum load (® ä 29)
5
Signal cable including screening (if required), observe cable specification (® ä 30)
6 Protective connection; do not disconnect!
7
Protective earth, observe cable specification (® ä 30)
8 Terminals for 4...20mA HART (active)
9 Terminals for supply voltage
10
Supply voltage: Observe terminal voltage (® ä 29), observe cable specification (® ä 30)
11 Terminal for potential equalization
12 Cable entry for signal line
13 Cable entry for power supply
!
CAUTION
To ensure electrical safety:
►
Do not disconnect the protective connection (7).
►
Disconnect the supply voltage before disconnecting the protective earth (8).
Connect protective earth to the internal ground terminal (8) before connecting the supply voltage. If
necessary, connect the potential matching line to the external ground terminal (12).
In order to ensure electromagnetic compatibility (EMC): Do not only ground the device via the
protective earth 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).