Endress+Hauser Micropilot FMR56 - Page 24

Micropilot FMR56, FMR57
24 Endress+Hauser
Connection examples for the switch output
For HART devices, the switch output is available as an option.
3+
+
-
4-
R
i
A0015909
 14 Connection of a relay
3+
2
1
+
4-
R
i
A0015910
 15 Connection to 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.