Endress+Hauser Micropilot FMR67 - Page 17

Micropilot FMR67
Endress+Hauser V. 1, Rev. 3, 11-04-2017 17
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.
3+
+
-
4-
A0015909

8 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

9 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.