Endress+Hauser Levelflex FMP55 - Page 38

Electrical connection Levelflex FMP55 HART
38 Endress+Hauser
Terminal assignment 2-wire: 4-20 mA HART, switch output
1
3
+
+
2
4
-
-
A
1
3
+
+
2
4
-
-
B
1
4
5
2
3
A0036500
 10 Terminal assignment 2-wire: 4-20 mA HART, switch output
A Without integrated overvoltage protection
B With integrated overvoltage protection
1 Connection 4-20 mA HART passive: terminals 1 and 2, without integrated overvoltage protection
2 Connection switch output (Open Collector): terminals 3 and 4, without integrated overvoltage protection
3 Connection switch output (Open Collector): terminals 3 and 4, with integrated overvoltage protection
4 Connection 4-20 mA HART passive: terminals 1 and 2, with integrated overvoltage protection
5 Terminal for cable screen
Block diagram 2-wire: 4-20 mA HART, switch output
5
4
1
2
3
+
+
+
-
-
-
Y
I
6
7
1
2
3
4
A0036501
 11 Block diagram 2-wire: 4-20 mA HART, switch output
1 Active barrier with power supply (e.g. RN221N); observe terminal voltage
2 HART communication resistor (≥ 250 Ω); observe maximum load
3 Connection for Commubox FXA195 or FieldXpert SFX350/SFX370 (via VIATOR Bluetooth modem)
4 Analog display device; observe maximum load
5 Cable screen; observe cable specification
6 Measuring device
7 Switch output (Open Collector)