Table of Contents
Advertisement
PG 720 Expansions
5.7
Replacing the Backup Battery
Battery Power
A backup battery (3.6 V lithium battery) powers the real-time clock
Supply for
even after the PG 720 is switched off. In addition to the time of day, all
Real-Time Clock
the information about the PG 720 (device configuration) is stored in
and Configuration
RAM. If the backup battery fails or is removed, all these data are lost.
The clock uses very little power and the lithium battery has a high
capacity so that the battery can provide backup power for the real-time
clock for many years and seldom needs to be replaced.
Battery Voltage
If the battery voltage is too low, the time of day and the device
too Low
configuration data in the RAM are lost.
Replacing the
In this case, you must replace the backup battery. The battery is
Battery
located on the drive mounting.
To change the battery, proceed as follows:
1. Switch off your PG 720 and remove the power cable and all the
2. Open the unit as described in Section 5.1.
3. Now change the battery by removing the connector and releasing it
4. Push the new battery firmly into the clip.
5. Close the unit as described in Section 5.7
Figure 5-6 Clip for Backup Battery
Caution
!
Risk of damage!
Only replace the lithium battery with an identical battery or with a type
recommended by the manufacturer (Order No.: W79084-E1003-B1).
Dispose of used batteries in keeping with local regulations.
Changing SETUP
If you change the battery or unplug the battery connector you must run
the SETUP program to reset your programming device's configuration
data (see Chapter 6).
5-10
connecting cables.
from the clip.
Backup battery
Clip
Hard disk drive
PG 720 PII Programming Device
C79000-G7076-C756-02
Advertisement
Table of Contents
