4 Installation and Connection
4.4.2 Unbalanced
Inputs
Fig. 6: Unbalanced
input stage
Table 2: Standard val-
ues for Rv and 2 x Rv
18
VDC
12 V ±2 V
24 V ±4 V
48 V ±4 V
* In order to satisfy the IEC 61938 symmetry requirement,
make sure the actual values of the two resistors 2 x Rv
do not differ by more than 0.5%!
Rv
330 Ω
680 Ω
3,300 Ω
2 x Rv*
680 Ω
1,200 Ω
6,800 Ω