Endress+Hauser RIA15 - Connection in 4 to 20 mA Mode; Connection in HART Mode

Wiring RIA15
22 Endress+Hauser
6.2 Connection in 4 to 20 mA mode
The following diagrams show how the process display unit is connected in 4 to 20 mA
mode.
Connection without backlighting Connection with backlighting
Connection with transmitter power supply
and transmitter
LED
- +
-
-
+
+
I
Y
1
A0017704
1 Transmitter power supply
+
+
I
Y
1
-
-
LED
- +
A0017705
1 Transmitter power supply
Connection with transmitter power supply
and transmitter using the auxiliary
terminal
-
-
+
+
I
Y
1
LED
- +
A0017706
1 Transmitter power supply
+
+
I
Y
1
-
-
LED
- +
A0017707
1 Transmitter power supply
Connection with PLC and transmitter
-
-
+
+
I
Y
1
LED
- +
A0019720
1 PLC
-
-
+
+
I
Y
1
LED
- +
A0019721
1 PLC
Connection without transmitter power
supply directly in the 4 to 20 mA circuit
+
2
-
I
Y
LED
- +
A0017708
2 4 to 20 mA power source
+
2
-
I
Y
LED
- +
A0017709
2 4 to 20 mA power source
6.3 Connection in HART mode
The following diagrams show how the process display unit is connected in HART mode.
6.3.1
HART
®
connection
NOTICE
Undefined behavior due to incorrect wiring of an actuator
‣
When installing the process display unit together with an actuator, the Operating
Instructions for the actuator must be followed!
The HART
®
communication resistance of 230 Ω in the signal line is always necessary
in the case of a low-impedance power supply. It must be installed between the power
supply and the display unit.