System overview
3.5.2.1.1 +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 (10 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
Description
Figure
1
+
2
Functional ground
3
-
•
Reverse polarity protection
•
3-pin
•
Male
Electrical properties
Nominal voltage
24 VDC ±25%, SELV
1)
Nominal current
Max. 0.2 A
Overvoltage category per EN 61131-2
II
Galvanic isolation
Yes
1)
EN 60950 requirements must be observed.
3.5.2.1.1.1 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 functionality.
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).
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SDL3 Converter User's manual V 2.01