Siemens SINUMERIK 840D sl Manual page 16

Application Planning
2.1 Secondary electrical conditions
User interfaces (UIs)
UIs are all the interfaces that are freely accessible to the machine operator without the need
for tools or aids. These user interfaces are designed with safe isolation to EN 61800-5-1.
Interfaces for servicing, startup and maintenance
The interfaces for servicing/installation and start-up/maintenance purposes are provided
without protective separation.
If necessary, these interfaces can be isolated safely using a supplementary adapter
(insulation voltage 230 V AC). Although these adapters are not included in the Siemens
scope of delivery, you can buy these parts from your local dealer, who will be happy to
advise you.
Safe isolation can only be ensured if the system configuration specified below is strictly
adhered to. When mounting additional components (e.g. S7-300 FM, IP) with an end user
interface, please make sure that the end user interface has a basic insulation for at least
230 V AC.
The figure below shows the galvanic isolation of the 840D sl/SINAMICS S120/S7-300
system.
Figure 2-1
16
DANGER
DANGER
Safe isolation to EN 61800-5-1
Manual, 07/2007, 6FC5397-0AP10-2BA0
NCU