In the event of a power failure, the battery back-up provides for the main-
tenace of correct time (approx. 1.5 years). Even without power and with a
drained battery, the switching times remain permanently stored.
1. Note the polarity of the lithium battery.
2. Insert the lithium battery into the holder (see diagram 1).
3. Push the battery holder into the battery compartment
TR 642S / TR 644S see diagram 2 / TR 686/ 4 DCF see diagram 4.
4. Press the battery holder down, untl it audibly locates.
67
Important Instructions
Battery changing with mains voltage
All memorised program data is maintained
Battery changing without mains voltage
Note: date and time are lost.
1. Lift the battery draw with a suitable screw driver (see diagram 2).
2. Remove the lithium battery from the holder (see diagram 3).
3. Note the polarity of the new lithium cell.
4. Insert the Lithium battery into the holder (see diagram 1).
5. Push the battery holder into the battery compartment (see diagram 2).
6. Press the battery holder down until it audibly locates.
7. Dispose of lithium battery in an environmentally friendly way.
4.0 Power Reserve
4.1 Battery Loading
4.2 Battery Changing TR 642 S – TR 644 S/ DCF
dia. 1
3.5 Illustration of Dimensions
Note
The time switches conform to the European Regulations 73/23/EWG (low voltage
rules) and 89/336/EWG (EMV-Regulations).
If the time switches are used with other products in one installation, attention
must be given to ensure that the whole installation does not cause radio interfe-
rence.
TR642S
TR644S
TR642S DCF
TR644S DCF
TR684/ 4 DCF
