4 Installation
4.2 Electrical Connection
Manual
SIPART DR21
C73000-B7476-C143-08
139
4 to 20 mA
AI+
L+
--
referenced to ground
~
~
49.9
Ω
6DR2800-8J
3
+
--
GND
2
1
4
I
+
Figure 4-28 Connection of a 4 to 20 mA 2-wire transmitter supplied from controller’s L+
49.9
Ω
6DR2800-8J
3
+
--
GND
2
4
4 to 20 mA
Controller 1
AI+
AI--
L+
~
~
Controller 2
1
49.9
Ω
6DR2800-8J
3
+
--
2
4
1
GND
+
--
I
Figure 4-29 Connection of a 4 to 20 mA 2-wire-transmitter to two instruments in series supplied by L+ from
one of the instruments
Every input amplifier is supplied by a differential input voltage of 0.2 to 1 V. The input amplifier
of controller 1 has an additional common mode voltage of 0.2 to 1 V which is suppressed. Sev-
eral instruments with a total common-mode voltage of up to 10 V can be connected in series.
The last controller referenced to ground may also have a ground referenced input load (e.g. AI1
or AI2 of SIPART DR21).
The permissible load voltage of the transmitter must be observed in series circuiting of load re-
sistors.
Summary of Contents for SIPART DR21
Page 1: ...SIPART DR21 C73000 B7476 C143 08 1 SIPART DR21 6DR 210 Edition 08 2010 Manual ...
Page 2: ...SIPART DR21 C73000 B7476 C143 08 2 ...
Page 148: ...4 Installation 4 2 Electrical Connection Manual 148 SIPART DR21 C73000 B7476 C143 08 ...
Page 180: ...5 Operation 5 5 CPU self diagnostics Manual 180 SIPART DR21 C73000 B7476 C143 08 ...
Page 242: ...Manual 242 SIPART DR21 C73000 B7476 C143 07 ...