
If you remove a synchronization module in redundant system mode, there is a loss of
synchronization. The reserve CPU changes to ERROR-SEARCH mode for some minutes. If
the new synchronization module is inserted and the redundant link is reestablished during this
time, the reserve CPU switches to redundant system mode, otherwise it switches to STOP.
Once you have inserted the new synchronization module and reestablished the redundant link,
you must restart the reserve CPU.
Mechanical configuration
Figure 4-1
Synchronization modules 6ES7960-1AA08-0XA0 and 6ES7960-1Ax06-0XA0
CAUTION
Class 1 laser product
Risk of injury.
The synchronization module is equipped with a laser system and is classified as a "CLASS 1
LASER PRODUCT" according to IEC 60825–1.
Avoid direct contact with the laser beam. Do not open the housing. Always observe the
information provided in this manual, and keep the manual to hand as a reference.
CLASS 1 LASER PRODUCT
LASER KLASSE 1 PRODUKT
TO EN 60825
Description of the device
4.2 Synchronization modules for S7–400H
Synchronization modules for S7-400H
12
Equipment Manual, 04/2020, A5E50072434-AA