USER HANDBOOK 2.0 | DC20XX, ET20XX, ECC21XX SLIM
Berghof Automation GmbH | Harretstrasse 1 | 72800 Eningen | www.berghof.com
Dialog-Controller-DC20XX_EN.docx
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5.
Connection
WARNING
Uncontrolled and unpredictable operational behaviour!
Failure in certain components in electronic control systems may result in
uncontrolled and unpredictable operational behaviour.
All types of failure and the associated fuse systems are to be taken into
account at system level.
Comply with all automation system manufacturer instructions.
5.1. Power supply
The device is powered by an external 24 V DC power supply. It is not designed to be connected to a DC mains
supply.
Before plugging in the device, ensure that the external power supply meets the required specifications
(type K to 61131-2).
External power supply (24 V DC)
Supply voltage
+24 V DC SELV (
–15% / +20%)
Alternating current
proportion
Max. 5%
The direct voltage level must not fall below 20.4 V.
Power consumption
Total max. 3.2 A at +24 V DC (1.2 A electronics; 2 A external I/O)
Energy buffering
10 ms
Internal power supply
A power supply for the system electronics for an input voltage of 24 V DC (–15% / +20%) is integrated into
the device. The power supply has integrated protection against reverse polarity and surge current protection
(1.2 A).
Installation
All connections and cables must be laid out so as to prevent inductive and capacitive interference
causing any damage to the device.
Ensure that the infeed lines provide adequate current and voltage carrying capacity.