Siemens siprotec SJ62 User Manual page 373

3 Mounting and Commissioning
Nominal Currents
Control Voltage for
Binary Inputs
Contact Mode for
Binary Outputs
Replacing Interfac-
es
Terminating of
Serial Interfaces
371
The input transformers of the devices 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
assignment of the plug-in jumpers to the nominal current and the spatial arrangement
of the jumpers are described separately for devices 7SJ63 and 7SJ64 in the following
sections.
Jumpers X61, X62 and X63 must be set for the same nominal current, i.e. there must
be one jumper for each input transformer, and the common jumper X 60.
With standard 1/5 A-jumpers jumper X64 for the ground path is set to 1 A or 5 A irre-
spective of other jumper positions and depending on the ordered variant.
With models equipped with a sensitive ground fault current input of setting range 0.001
to 1.500 A there is no jumper X64.
Note
If nominal current ratings are changed exceptionally, then the new ratings must be reg-
istered in addresses 205 CT SECONDARY/218 Ignd-CT SEC in the Power System
Data (see Subsection 2.1.3.2).
When the device is delivered from the factory, the binary inputs are set to operate with
a voltage that corresponds to the rated DC voltage of the power supply. In general, to
optimize the operation of the inputs, the pick-up voltage of the inputs should be set to
most closely match the actual control voltage being used.
A jumper position is changed to adjust the pick-up voltage of a binary input. The as-
signment of the jumpers to the binary inputs and their spatial arrangement are de-
scribed separately for devices 7SJ63 and 7SJ64 in the following sections.
Note
If binary inputs are used for trip circuit monitoring, note that two binary inputs (or a
binary input and a replacement resistor) are connected in series. The switching
threshold must lie clearly below one half of the rated control voltage.
Input/output modules can have relays that are equipped with changeover contacts.
Therefore it is necessary to rearrange a jumper. To which relays of which modules this
applies is described separately for devices 7SJ63 and 7SJ64 in the following sections.
Only serial interfaces of devices for panel and cubicle flush mounting as well as of
mounting devices with detached operator panel or without operator panel are replace-
able. In the following section under margin heading „Exchanging Interface Modules" it
is described which interfaces can be exchanged, and how this is done.
If the device is equipped with a serial RS485 interface or PROFIBUS, they must be
terminated with resistors at the last device on the bus to ensure reliable data transmis-
sion. For this purpose termination resistors are provided on the PCB of the CPU pro-
cessor module and on the RS485 or PROFIBUS interface module which can be con-
nected via jumpers. Here, only one option must be selected. The physical
arrangement of the jumpers on p.c.b. of the corresponding processor board CPU is
described in the following sections under side title „Processor Board CPU". The ar-
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015