Endress+Hauser Levelflex FMP55 Brief Operating Instructions page 16

Electrical connection
Block diagram, 2-wire: 4 to 20 mA HART, switch output
 5 Block diagram, 2-wire: 4 to 20 mA HART, switch output
1 Active barrier for power supply (e.g. RN221N); observe terminal voltage
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 Switch output (open collector)
Terminal assignment, 2-wire: 4 to 20 mA HART, 4 to 20 mA
A
2
1
 6 Terminal assignment, 2-wire: 4 to 20 mA HART, 4 to 20 mA
A Without integrated overvoltage protection
B With integrated overvoltage protection
1 Connection current output 1, 4 to 20 mA HART passive: terminals 1 and 2, without integrated
overvoltage protection
2 Connection current output 2, 4 to 20 mA: terminals 3 and 4, without integrated overvoltage
protection
3 Connection current output 2, 4 to 20 mA: terminals 3 and 4, with integrated overvoltage protection
4 Connection current output 1, 4 to 20 mA HART passive: terminals 1 and 2, with integrated
overvoltage protection
5 Terminal for cable shield
16
3
2
1
+
-
5
Levelflex FMP55 HART
4
5
6
+
1
I
-
2
+
Y
3
-
4
7
B
A0036501
3
4
5
A0036500
Endress+Hauser