3.1 Installation and Connections
107
6MD665 Manual
C53000-G1876-C103-3
Note
The RS485 interface used with this device for the inter relay communication cannot be
provided with a termination resistor externally, as the +5 V voltage is not routed out
with this device.
The external termination of the RS485 bus is only possible between the lines A/A' and
B/B', each with 120
Ω
at the end of the bus. The resulting resistance may not be
smaller than 60
Ω
.
3.1.2.5
Reassembly
To reassemble the device, proceed as follows:
• Insert the modules carefully in the housing. For the model of the device designed
for surface mounting, use the metal lever to insert the CPU processor module. The
installation is easier with the lever.
• First, plug the connector of the ribbon cable onto the input/output module I/O and
then onto the CPU processor module. Be careful that no connector pins are bent!
Don’t apply 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 of this, the connector of
the ribbon cable derived from the 68-pin connector on the device rear panel must
be plugged on the connector of the processor module CPU. The 7-pin X16 connec-
tor belonging to the ribbon cable must be plugged behind the subminiature socket.
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.
• Mount the covers.
• Screw the interfaces tight on the rear panel of the device again.
3.1.3
Installation
3.1.3.1
Panel Flush Mounting
• Remove the four covers at the corners and 2 in the centre above and below on the
front cover. This exposes the 4 elongated holes in the mounting bracket.
• Place the mounting rail adapter on the rear plate and fasten it with the screws that
you have removed in step 4. Dimensional drawings can be found in the Technical
data section.
• Replace the 4 covers.
• Connect the ground on the rear plate of the device to the protective ground of the
panel. Using at least one M4 screw. The cross-sectional area of the ground wire
Summary of Contents for SIPROTEC 6MD665
Page 8: ...Preface vi 6MD665 Manual C53000 G1876 C103 3 ...
Page 14: ...Contents vi 6MD665 Manual C53000 G1876 C103 3 ...
Page 140: ...3 Installation and Commissioning 126 6MD665 Manual C53000 G1876 C103 3 ...
Page 166: ...4 Technical Data 152 6MD665 Manual C53000 G1876 C103 3 ...
Page 210: ...Literature 196 6MD665 Manual C53000 G1876 C103 3 ...
Page 222: ...Index 208 6MD665 Manual C53000 G1876 C103 3 ...