Bosch Rexroth IndraControl VPP 21.1 BP, Project Planning Manual

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VPP 21.1 Maintenance and Installation
8-3
DOK-SUPPL*-VPP*21.1***-PR02-EN-P
8.3 Display
A fading backlight causes a progressive deterioration of the LCD display's
readability, so that a display exchange is necessary. Exchanging the
backlight is not possible. To exchange the display, please contact the
Bosch Rexroth Service.
8.4 Buffer Battery
The build-in lithium battery buffers the SRAM blocks and the clock, if the
power supply (24 VDC) is switched off. The buffer time is at least five
years, so that after five years a battery exchange might occur. To avoid
the loss of data during battery exchange, a gold capacitor provides for the
buffering (10 minutes).
The battery is permanently checked by a monitoring circuit. If the voltage
falls below its minimum value, LED H4 at the connector panel is activated.
Then, you should exchange the battery. For this, please contact the
Bosch Rexroth service.
If you decide that the battery should be exchanged by your own skilled
stuff, consider the following instructions:
DANGER
Fire or explosion hazard by use of wrong
battery types!
⇒
Replace the battery only by a type for the VPP 21
permitted by Bosch Rexroth. At present, this type is:
Lithium battery 3.0 V; 2.3 Ah with Bosch Rexroth part
number: 1070922650.
DANGER
Risk of injury through improper treatment of the
battery!
The battery in this device can cause fire or chemical
burn, if it is treated in the wrong way.
⇒
The battery must not be charged, opened, heated
over 100 °C and burn.
Note: The lithium element is designed for the use under normal
temperature conditions. The temperatures to be expected
must not exceed values of 100 °C.
Note: The lithium cells must not be connected in series with a power
source, as this would increase the forward current through the
cells to an impermissible value.