Levelflex FMP56, FMP57
Endress+Hauser 27
Connection examples for the switch output
For HART devices, the switch output is available as an option. See product structure, feature 20:
"Power Supply, Output", option B: "2-wire; 4-20mA HART, switch output"
Devices with PROFIBUS PA and FOUNDATION Fieldbus always have a switch output.
A0015909
9 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
A0015910
10 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.
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