Manual

Technical Information / Datasheet
Documentation, Supplement to BU 0200
AS-i, SK 225E, SK 235E
1.0
AS-Interface, risk of short circuit at 24 V DC circuit
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TI 800 000000007
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reason for change(s)
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Pos: 4 /Technisch e Information en/Sonstige Do kumente/Ergänzu ng zum Handb uch AS-i [S K 225E, SK235 E] @ 4\mod_13 93488915264_3 88.docx @ 12 0671 @ 5 @ 1
Supplement to Manual
Subject:
AS Interface – Risk of short circuit
Affected products and documents
Product Series
Document
Issue
Section
Page
SK 225E
BU 0200
4411
5.4
160
SK 235E
BU 0200
4411
5.4
160
Fundamentals
The following information is known from the manual:
If the AS interface is used with the device versions SK 225E and SK 235E, the voltage supply of the
frequency inverter is only via the yellow AS-i cable. On terminal "44" of the frequency inverter, in this
case a 24 V DC voltage is provided, which may be used to supply any actuators (∑ 60 mA). The
additional connection of a control voltage to the frequency inverter is not permissible in this
case and will result in damage to the device.
Important supplementary information
Please note the following supplementary information:
NOTICE
Defects due to short circuit
The terminal "44" is not protected against short circuit. For example, if a short circuit is caused by an actuator
which is supplied via this terminal, this will result in damage to the control board of the frequency inverter and
failure of the AS-i bus.
To avoid this fault, please not the following possibilities:
Variant 1 – connection to 24 V (Terminal 44)
• Additional protection of Terminal 44 by the inclusion of a microfuse.
• Electrical data for the microfuse: 63 mA, fast acting.
• The limit of 60 mA for the maximum load (total current) must be complied with.