GN Series Hardware Manual
3.10 Accessing Internal Components
39
3.10 Accessing Internal Components
!
WARNING
Before removing the cover of the GN unit in order to gain access
to the internal components, the system must be powered down
and the power cord has to be disconnected from the power
supply.
Otherwise, electric shock may be the result.
The system may only be opened in accordance with the description in this hardware manual
for:
• Replacing the lithium battery
• Configuring the RS422/RS485 interface (GN10/GN12/GN15). These procedures may
be carried out by qualified specialized personnel only.
CAUTION
• Do not operate the system without the cover.
• Please observe the safety instructions for handling assemblies with
static-sensitive devices. Failure to do so can result in damage to the device.
3.10.1 Configuration of the RS422/RS485 Port
The configuration of the RS422/RS485 port (see page 23) can be changed via the DIP
switches. In order to change the factory configuration (RS422 4-channel mode), proceed as
follows:
☞
NOTE
The new port configuration has to be set before the system is installed on a
panel or into a switching cabinet. The system must be disconnected from the
power supply. Disconnect all peripheral devices. Before you begin, ensure that
you have a clean, flat and ESD-safe surface to work on.
1.
2.
3.
Procedure
1. Close all applications and shut down the system properly
2. Disconnect the power cord from the power supply
3. Disconnect all peripheral devicess
The system should lay on a flat, clean surface with the front panel facing
downwards. Make sure that the display surface is protected against scratching
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