hopf Elektronik GmbH 6844, Техническое руководство

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I
NSTALLATION
System 6844(RC) - V03.00 37 / 157
hopf
Elektronik GmbH
Nottebohmstr. 41
• D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: info@hopf.com
3.2.4 DC Power Supply (Option)
Ensure that the external power supply is switched off. When connecting the
supply cable make sure that the polarity is correct and the equipment is
earthed.

The cable of the power supply is connected using a 2-pole plug
connector with additional earth connection and interlocked with
the System 6844(RC) 1U Slim Line:
+V
in
: Positive pole (contact 1)
–V
in
: Negative pole (contact 2)
PE: Earth
The System 6844(RC) 1U Slim Line can be damaged if incorrect voltage is
connected.
Earthing:
By default the minus pole (-Vin) and earthing (PE) are connected sys-
tem-sided.
3.2.4.1 Power Supply Unit Specifications
All DC power supply specifications are described in Chapter 11.2 Specific Technical Data
for 1U .
3.2.4.2 Fusing
Pay attention to the correct fusing of the power supply when connecting the System
6844(RC) 1U Slim Line.
The corresponding performance data can be taken from the equipment nameplate. The Sys-
tem 6844(RC) 1U Slim Line is currently fitted with a power supply unit with a power con-
sumption of max. 40VA.
If the internal fuse (device protection) trips it is highly probable that the
equipment is faulty. In this case the device should be checked in the facto-
ry.
3.2.4.3 Reverse Voltage Protection
The version of System 6844(RC) 1U Slim Line with DC supply has reverse voltage protec-
tion. This protection prevents damage to the equipment due to an incorrectly connected DC
power supply.
Protection is effected by means of a self-resetting fuse. In the case of reverse polarity, it is
necessary to switch the equipment off for approx. 20 seconds after this fuse has tripped. The
power supply can then be connected with the correct polarity.