Siemens SIPROTEC 4 User Manual page 371

With standard 1/5 A transformers, jumper X64 for the ground path is set to 1 A or 5 A irrespective 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
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If nominal current ratings are changed by way of exception, then the new ratings must be registered via
the parameters 205 CT SECONDARY /218 Ignd-CT SEC in the Power System Data (see Section
2.1.3.2 Setting
Control Voltage for Binary Inputs
When the device is delivered from the factory, the binary inputs are set to operate with a voltage that corre-
sponds to the rated DC voltage of the power supply. In general, to optimize the operation of the inputs, the
pickup voltage of the inputs should be set to most closely match the actual control voltage being used.
A jumper position must be changed to adjust the pickup voltage of a binary input. The assignment of the
jumpers to the binary inputs and their spatial arrangement are described separately for devices 7SJ62 and
7SJ64 in the following sections.
NOTE
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If binary inputs are used for trip circuit monitoring, please note that two binary inputs (or one binary input
and one replacement resistor) must be connected in series. The switching threshold must lie significantly
below half the nominal voltage.
Contact Mode for Binary Outputs
Input/output modules can have relays with changeover contacts which can be set as either NO or NC. To do
so, the location of one jumper must be changed. To which relays of which modules this applies, is described-
separately for devices 7SJ62 and 7SJ64 in the following sections.
Exchanging Interfaces
The serial interface can only be replaced in devices designed for panel and cubicle flush mounting and for
surface-mounted devices with detached or without operator panel. The following section under margin
heading "Rreplacing Interface Modules" describes which interfaces can be exchanged, and how this is done.
Termination of Bus-capable Interfaces
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 transmission. For this purpose, terminating resistors are
provided on the PCB of the CPU processor module and on the RS485 or PROFIBUS interface module which can
be connected via jumpers. Here, only one option can be used. The physical arrangement of the jumpers on the
PCB of the corresponding processor board CPU is described in the following sections under margin heading
„Processor Board CPU". The arrangement of the jumpers on the interface modules is described under margin
heading "RS485/RS232" and "Profibus Interface (FMS/DP) DNP3.0/Modbus". Both jumpers must always be
plugged identically.
The terminating resistors are disabled on delivery.
Spare Parts
Spare parts can be the buffer battery that provides for storage of the data in the battery-buffered RAM when
the supply voltage fails, and the miniature fuse of the internal power supply. Their physical arrangement is
shown in the figures of the processor boards. The ratings of the fuse are printed on the board next to the fuse.
When exchanging the fuse, please observe the hints given in the SIPROTEC 4 System Description under "Main-
tenance" and "Corrective Action / Repairs".
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
Notes).
Mounting and Commissioning
3.1 Mounting and Connections
371