Siemens SIPART DR22 Manual page 164

2 Installation
2.2 Electrical Connection
2.2.3 Alternative connection for I- and U-input
+U
H
+
U
--
Figure 2-34 Single-pin connection of a non-floating voltage supply with negative polarity to ground
U
H
--
U
+
Figure 2-35 Single-pin connection of a non-floating voltage supply with positive polarity to ground
Figure 2-34 and Figure 2-35:
The voltage dip on the ground rail between the voltage source and the input amplifier appears
as a measuring error. Only use when ground cables are short or choose a circuit configuration
as shown in figure 2-36!
+U
H
+
U
--
Figure 2-36 Double-pin wiring of a voltage source with negative polarity to ground
162
AE+
+
AE--
--
M
AE+
+
only permitted when
AE--
connected for 1 V
--
M
AE+
+
AE--
--
M
Manual
SIPART DR22 6DR2210
C79000-G7476-C154-03