Siemens SIMATIC S7-400H System Manual page 250

Synchronization modules
15.1 Synchronization modules for S7-400H
Mechanical configuration
Figure 15-1
Risk of injury.
The synchronization module is equipped with a laser system and is classified as a
"CLASS 1 LASER PRODUCT" 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.
250
Synchronization module
CAUTION
System Manual, 09/2007, A5E00267695-03
S7-400H