Siemens SIPART DR20 Project Planning Manual page 74

Project Planning Manual
Connection of a two-wire transmitter to a signal converter 6DR2800-8J. The transmitter is powered by L+ of the controller:
Connection circuit of signal converter 6DR2800-8J as current input with a non-floating current source of 0 to 20 or 4 to 20 mA.
0 (4) to 20 mA
+
Ι
-
Series connection of 2 current inputs with signal converter 6DR2800-8J. Both controllers must be connected to a common ground.
Controller 2 could also be an analog input AE1 or AE2.
Fig. 5/4 Wiring of module 6DR2800-8J for current signals
74
- 4 to 20 mA
4
+
Ι
3
2
1)
1
6
5
0 (4) to 20 mA
4
+
Ι
-
3
2
1)
1
6
AE +
4
49.9 Ω
3
AE -
2
1
6DR2800-8J
6
M
Standard controller
AE +
4
49.9 Ω
3
AE -
2
1
6DR2800-8J
6
M
Standard controller
AE +
+
49.9 Ω
-
AE -
6DR2800-8J
M
Standard controller
L +
AE +
+
49.9 Ω
AE -
-
6DR2800-8J
M
Standard controller
AE3 / AE4
+
-
Device 1
AE3 / AE4
+
-
Device 2
SIPART DR20
AE3 / AE4
AE3 / AE4
1) The common-mode voltage may be
up to + 10V. A total resistance
against the reference potential is
therefore permissable up to 500 Ω
at this position. Note the minimum
operating voltage of the two-wire
transmitter.