Specifications For Insulation Tests, Protection Class And Protection Rating - Siemens SIMATIC HMI Operating Instructions Manual

Maintaining Clearances
The following clearance must be maintained around the Industrial USB Hub 4:
● 50 mm respectively above and below the mounting cut-out for ventilation
● 15 mm respectively to the right and left of the mounting cut-out to attach the mounting
● At the rear of the device: at least 10 mm clearance in addition to the depth of the device
3.4 Specifications for insulation tests, protection class and protection
rating
Test voltages
The table below shows the test voltages to be applied for the insulation tests of the type test
according to IEC 61131-2.
Circuits with a nominal voltage of U
circuits or ground
< 50 V
Protection class
Protection class I according to IEC 60536; according to this standard, the device must be
grounded through connection to the rail.
Protection against Foreign Objects and Water
Protection class according to
IEC 60529
Front panel
Rear panel
The protection rating of the front panel can only be maintained, if the mounting seal is
properly installed at the installation cut-out and the cover flap of the Industrial USB Hub 4 is
closed.
Industrial USB Hub 4
Operating Instructions, 09/2007, A5E00471973-02

3.4 Specifications for insulation tests, protection class and protection rating

clamps
NOTICE
Ensure that the maximum ambient temperature is not exceeded when mounting the
device in a cabinet and especially in a closed enclosure.
to other Test voltage
e
500 V DC
Explanation
When mounted:
IP65
•
NEMA 4X/NEMA 12 (indoor use only), valid for mounted frames
•
IP20
Protection against touch with standard test fingers. There is no
protection against ingress by water.
Planning Application
83