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Mounting and Commissioning
3.1 Mounting and Connections
The closest standard value of 39 kΩ is selected; the power is:
3.1.2
Hardware Modifications
3.1.2.1 General
A subsequent adaptation of hardware to the power system conditions can be necessary for example with
regard to the control voltage for binary inputs or termination of bus-capable interfaces. Follow the procedure
described in this section, whenever hardware modifications are carried out.
Auxiliary Voltage
There are different ranges of input voltage for the auxiliary voltage (refer to the Ordering Information in Appen-
dix A.1). The power supplies of the variants for 60/110/125 VDC and 110/125/220/250 VDC / 115/230 VAC are
largely interchangeable by modifying the position of the jumpers. The assignment of these jumpers to the
nominal voltage ranges and their spatial arrangement on the PCB are described further below at „Processor
Board C-CPU-2" Location and ratings of the miniature fuse and the buffer battery are also shown. When the
device is delivered, these jumpers are set according to the name-plate sticker. Generally, they do not need to
be altered.
Live Contact
The life contact of the device is a changeover contact from which either the NC contact or the NO contact can
be connected to the device terminals via a plug-in jumper (X40). Assignments of the jumpers to the contact type
and the spatial layout of the jumpers are described in the following Section at margin heading „Processor Board
C-CPU-2".
Rated Currents
The input transformers of the device are set to a nominal current of 1 A or 5 A with jumpers. The position of the
jumpers are set according to the name-plate sticker. The assignments of the jumpers to the nominal current
and the spatial layout of the jumpers are described in the following section „Board C-I/O-2" or „Board C-I/O-11".
All jumpers must be set for one nominal current, i.e. one jumper (X61 to X64) for each input transformer and
additionally the common jumper X60.
Note
If nominal current ratings are changed exceptionally, then the new ratings must be registered in address 206
CT SECONDARY in the power system data (see Section 2.1.3.1).
Control Voltage for Binary Inputs
When the device is delivered the binary inputs are set to operate with a voltage that corresponds to the nominal
voltage of the power supply. If the nominal values differ from the power system control voltage, it may be nec-
essary to change the switching threshold of the binary inputs.
A jumper position is changed to adjust the pickup voltage of a binary input. The assignment of the jumpers to
the binary inputs and the spatial layout of the jumpers is described in the following sections at margin headings
"Processor board C-CPU-2", "Board(s) C-I/O-4" and "Board C-I/O-11".
184
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
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