Termination
For bus-capable interfaces a termination is necessary at the bus for each last device, i.e. termination resistors
must be connected. With 7SJ62/64, this applies to variants with an RS485 or Profibus interface.
The terminating resistors are located on the RS485 or Profibus interface module that is mounted to the
processor input/output board CPU (serial no. 1 in Figure 3-3 to Figure 3-7).
With default setting the jumpers are set such that the termination resistors are disconnected. Both jumpers of
a board must always be plugged in the same way.
The terminating resistors can also be connected externally (e.g. to the terminal block), see Figure 3-16. In this
case, the terminating resistors located on the RS485 or PROFIBUS interface module must be switched off.
Reassembly
To reassemble the device, proceed as follows:
•
Carefully insert the boards into the case. The mounting locations are shown in Figure 3-3 to Figure 3-7.
For the model of the device designed for surface mounting, use the metal lever to insert the processor
circuit board CPU board. The installation is easier with the lever.
•
First plug the plug connectors of the ribbon cable into the input/output boards I/O and then onto the
processor module CPU. Do not bend any connector pins ! Do not use force !
•
Insert the plug connector of the ribbon cable between the processor module CPU and the front cover into
the socket of the front cover. This action does not apply to the device version with detached operator
panel. Instead the plug connector of the ribbon cable connected to a 68pole plug connector on the rear
side of the device must be plugged into the plug connector of the processor circuit board CPU. The 7pole
X16 connector belonging to the ribbon cable must be plugged behind the D-subminiature female
connector. The plugging position is not relevant in this context as the connection is protected against
polarity reversal.
•
Press the latches of the plug connectors together.
•
Replace the front cover and secure to the housing with the screws.
•
Put the covers back on.
•
Re-fasten the interfaces on the rear of the device housing. This activity is not necessary if the device is
designed for surface mounting.
Installation
Panel Flush Mounting
Depending on the version, the device housing can be
1
/
3
,
1
/
2
or
1
/
1
. For housing size
1
/
3
or
1
/
2
(Figure 3-26 and
Figure 3-27) 4 covers and 4 holes for securing the device, for housing size
1
/
1
(Figure 3-28) there are 6 covers
and 6 holes for securing the device.
For installation proceed as follows:
•
Remove the 4 covers at the corners of the front cover, for size
1
/
1
the 2 covers located centrally at the top
and bottom have to be removed as well. Thereby the 4 and 6 oblong holes in the mounting flange
respectively can be accessed.
•
Insert the device into the panel cut-out and fasten it with 4or 6 screws. For dimensions refer to Section
4.29 Dimensions.
•
Put the 4 or 6 covers back in place.
3.1.2.6
3.1.3
3.1.3.1
Mounting and Commissioning
3.1 Mounting and Connections
404 SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
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