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WIKA operating instructions, model CPH7650
EN
14261987.02 01/2019 EN/DE
4. Design and function
4.3.3 Electrical connections for a 3-wire test item
Example
Test item is a pressure sensor from WIKA with a mA signal:
1. Without its own power supply, the DC 24 V voltage must be activated via the menu
(see chapter 6.6 “Operating modes”)
2. With its own power supply available
Example:
Wiring diagram of a pressure sensor from WIKA
(3-wire connection) which must be checked/
calibrated.
- 24V OUT +
- V +
- mA / +
V
max. 12V
-
+
sig+
max. 24mA
mA
-
+
sig-
sig+
sig+
sig+
24V
output
-
+
UB-
UB-
sig+
UB+
UB+
self-powered
no
no
no
yes
test item
2wire (mA)
2wire (mA)
3wire (mA)
3wire (V)
- 24V OUT +
- V +
- mA / +
V
max. 12V
-
+
sig+
max. 24mA
mA
-
+
sig-
sig+
sig+
sig+
24V
output
-
+
UB-
UB-
sig+
UB+
UB+
self-powered
no
no
no
yes
test item
2wire (mA)
2wire (mA)
3wire (mA)
3wire (V)
Voltage
supply
+
-