6.2
Connection diagram
Connection
4 to 20 mA, 2-wire (output 405)
Voltage supply DC 16 to 28 V
Shielding
Caution: ground the device!
Ground all connected devices (such as
pumps and valves) to the same potential!
a
Figure: Connection to the pressure transmitter
CAUTION!
Ground (functional grounding) the housing of the pressure transmitter using the process con-
nection to protect against electromagnetic fields and electromagnetic charges!
6.3
Connection example
Pressure
Transmitter
p
=
U
/S+
B
0 V/S-
Ex-I Power Supply/
Input Isolating
Amplifier
Type 707530
+
+
=
=
4 to 20 mA
–
–
(L1)
(N)
(L+)
(L-)
Terminal assignment
11
36
Attached ca-
Round plug
ble
M12 × 1
WH
1
BU
3
BK
-
Controller
Display
Unit
+
–
+
+
4 to 20 mA/0 to 20 mA
–
+
–
+
+
0 to 5 V
1 to 5 V
–
6 Installation
a
2
3
1
4
Accessories
Cable box angled/straight
PVC
BN
BU
-
Recorder
–
+
–
–
+
–
PUR
WH
BU
-
19