Siemens SIPROTEC 7SD610 User Manual

3.1 Mounting and Connections
271
7SD610 Manual
C53000-G1176-C145-4
Note
If binary inputs are used for trip circuit supervision, note that two binary inputs (or a
binary input and a substitute resistor) are connected in series. The switching threshold
must lie clearly below half
of the nominal control voltage.
Replacing Interfac-
es
The serial interfaces can be exchanged in the versions for panel flush mounting and
cubicle mounting. The following section under margin heading „Rreplacing Interface
Modules“ describes which interfaces can be exchanged, and how this is done.
Terminating inter-
faces with bus ca-
pability
If the device is equipped with a serial RS485 port, the RS485 bus 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 C-CPU-2 processor
modules and on the interface module which can be connected via jumpers. The spatial
arrangement of the jumpers on the PCB of the processor module C-CPU-2 is de-
scribed in the following sections under „Processor module C-CPU-2“ and on the inter-
face modules under „RS485 interface“ and „Profibus/DNP-/MODBUS interface“. Both
jumpers must always have the same setting.
The termination resistors are disabled on delivery.
Spare Parts Spare parts can be the battery for storage of data in the battery-buffered RAM in case
of a power failure, and the internal power supply miniature fuse. Their spatial arrange-
ment is shown in the figure of the processor board. The ratings of the fuse are printed
on the board next to the fuse itself. When replacing the fuse, please observe the guide-
lines given in the SIPROTEC 4 System Description in the chapter „Maintenance“ and
„Corrective Maintenance“.
3.1.2.2 Disassembly
Work on the Printed
Circuit Boards
Note
It is assumed for the following steps that the device is not operative.
Caution!
Caution when changing jumper settings that affect nominal values of the
device:
As a consequence, the ordering number (MLFB) and the ratings on the name plate no
longer match the actual device properties.
Where such changes are necessary in exceptional cases, they MUST be marked
clearly and visibly on the device. Self-adhesive stickers are available that can be used
as supplementary name plate.
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Siemens SIPROTEC 7SD610 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SD610
Category	Relays
Language	English