Toshiba Programmable Controller PROSEC T3 - Manual (Page 79)

S.Maintenance and Checking
5.3
Maintenance parts
5.4
Replacing battery
To recover from failure quickly, it is recommended to keep the
following spare parts:
Part Quantity Remarks
I/O module
One of each Check the service life of the relay
type used output. See Sectiofi 2.3.
Fuse
Number to be
used
See Section 5.5.
Battery 1 For emergency. See Section 5.4.
CPU module 1
Prepare at least one each to minimize
Power supply module 1
the down-time of the system.
Programmer 1 Useful for the troubleshooting procedure.
Master program As required Saved in a disk, or other media.
Do not store spare parts in high temperature and humidity
locations.
Keep the temperature at ordinary room temperature or below
because the battery discharges when the ambient temperature
is high.
The lithium battery Is used for maintaining the T3's RAM memory
during power OFF. The battery is installed at factory shipment.
The installed date of the battery is marked on the rear of the battery
cover of the CPU module. Under normal service conditions, it is
recommended to replace the battery every two years. Check the
installed date and replace the battery with a new one if two years
have elapsed.
The LED (ВАТТ), which indicates the battery voltage is normal, is
installed in the front of the CPU module. The LED lights when the
battery voltage is normal. If this LED does not light or blinks, the
service life of the battery has ended. Replace the battery within 14
days. To maintain the RAM program, it is recommended to keep
the power ON until the battery is replaced.
CPU module
Connector
Batte^
containig
case
Battery
© Remove the battery cover.
© Remove the battery from its case.
© Unplug the connector of the
battery.
(D Connect a nevir battery connector.
© Insert a new battery into its case.
© Mount the battery cover on its
case.
User's manual - Hardware
71