Siemens 7ND3121 Installationsanleitung Seite 14

The window for setting the measuring ranges (8, Fig. 1) can be removed using a small
screwdriver so that the jumpers are accessible.
Note
The measuring range limits define the input range. The measuring range
limits are set using levers on the front of the recorder or via the PC
interface (see Instruction Manual).
3.2 Jumper for 50/60-Hz Selection
In order to suppress interferences, the frequency of the power supply or the surrounding
power network must be set using a jumper on the module "Central processing unit" (visible
in housing with chassis removed) according to Fig. 3. The factory setting is "50 Hz".
3.3 Jumper for Summer Time/Winter Time Selection
Simple selection of summer time/winter time is possible in addition to control via input DI4
using a jumper on the module "Motor control" (visible on rear of removed chassis)
according to Fig. 4. The factory setting is "MEZ".
MEZ = central European time
MESZ = central European summer time
Jumper positions Input ranges
Direct connection TC/RTD/R/Pot./U
±1 V
±10 V
±20 mA
Fig. 5 Jumper settings
Measuring ranges
(only recorder with
universal measuring
range)
DC U
0/1 V
0.2/1 V
±1 V
DC U
0/10 V
2/10 V
±10 V
DC I
0/20 mA
4/20 mA
±20 mA
9