Cable Specification - Endress+Hauser Levelflex FMP56 Operating Instructions Manual

Electrical connection
52
Connection examples for the switch output
3+
R
+
i
-
4-
 24 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
For optimum interference immunity we recommend to connect an external resistor
(internal resistance of the relay or Pull-up resistor) of < 1 000 Ω.
7.1.2

Cable specification

• Devices without integrated overvoltage protection
Pluggable spring-force terminals for wire cross-sections 0.5 to 2.5 mm
• Devices with integrated overvoltage protection
Screw terminals for wire cross-sections 0.2 to 2.5 mm
• For ambient temperature T
HART
• A normal device cable suffices if only the analog signal is used.
• A shielded cable is recommended if using the HART protocol. Observe grounding concept
of the plant.
• For 4-wire devices: Standard device cable is sufficient for the power line.
≥60 °C (140 °F): use cable for temperature T
U
Levelflex FMP56, FMP57 HART
1
3+
R
i
A0015909
4-
 25 Connection of a digital input
1 Pull-up resistor
2 Digital input
2 (20 to 14 AWG)
2 (24 to 14 AWG)
+20 K.
U
Endress+Hauser
+
2
A0015910