Endress+Hauser Cleanfit CPA871 - Page 32

Mounting Cleanfit CPA871
32 Endress+Hauser
BN
BK
BU
WH
1
2
3
4
+
+
-
-
A0022163
 21 Connecting cable for limit position switch on transmitter, switching amplifier, output interface
terminal etc.
1 Measuring position
2 Measuring position
3 Service position
4 Service position
Only pins 1 and 2 are assigned for manually activated assemblies with one switch
(measuring position).
If the feedback devices are operated with a 24 V DC power supply, e.g. at Liquiline
CM442/CM444/CM448, NAMUR terminals must be used. Namur terminal (8 V DC) for
the non-hazardous area available as an accessory→  72. The Namur terminal must
have its own power supply and cannot be powered by a current output of the CM44.
Signal table for limit position switches
Position of assembly Limit position switch, measuring position Limit position switch, service position
Measuring Active LOW (≥ 3 mA) Active LOW (≥ 3 mA)
Service Active HIGH (≤ 1 mA) Active HIGH (≤ 1 mA)