Endress+Hauser Levelflex FMP55 - Page 40

Electrical connection Levelflex FMP55 HART
40 Endress+Hauser
Connection examples for the switch output
3+
+
-
4-
A0015909
 12 Connection of a relay
Suitable relays (examples):
• Solid-state relay: Phoenix Contact OV-24DC/480AC/5 with
mounting rail connector UMK-1 OM-R/AMS
• Electromechanical relay: Phoenix Contact PLC-RSC-12DC/21
3+
2
1
+
4-
A0015910
 13 Connection of a digital input
1 Pull-up resistor
2 Digital input
For optimum interference immunity we recommend to connect an external resistor
(internal resistance of the relay or Pull-up resistor) of < 1 000 Ω.