Vdc Power Supply; Grounding - B&R Automation PC 3100 User Manual

4.6.2 +24 VDC power supply

Danger!
The device is only permitted to be supplied with a SELV/PELV power supply unit or with safety extra-low
voltage (SELV) per EN 60950.
The necessary 3-pin connector is not included in delivery; for suitable accessories, see
The device is protected against overload and reverse polarity by a soldered fuse (15 A, fast-acting). If the fuse
is defective (e.g. due to overload), the device must be sent to B&R for repairs. If the polarity is reversed, it is not
necessary to replace the fuse.
Pin
1
2
3
•
Reverse polarity protection
• 3-pin
• Male
Electrical properties
Nominal voltage
Nominal current
Overvoltage category per EN 61131-2
Inrush current
Galvanic isolation
Uninterruptible power supply
1) EN 60950 requirements must be observed.

4.6.3 Grounding

Caution!
The functional ground (power supply pin 2 and
ground connection) must be connected to the
central grounding point (e.g. control cabinet
or system) via the shortest possible path with
the lowest possible resistance and with the
largest possible wire cross section. This type of
grounding is mandatory for proper functionali-
ty.
For example, a copper strip must be attached to the ground connection at a central grounding point of the control
cabinet or system in which the device is installed. The wire cross section should be as large as possible (at least
2.5 mm²).
Automation PC 3100 User's manual V 2.10
Description
+
Functional ground
-
Technical data
"0TB103.9x" on page
Figure
24 VDC ±25%, SELV
1)
Max. 5.5 A
II
Max. 60 A for < 300 µs
Yes
No
226.
39