I
NSTALLATION
8030HEPTA/GPS GPS - NTP Time Server with 2x 10/100/1000 MBit LAN Interface - V04.00
27 / 178
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: [email protected]
5.1.4 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 inter-
locked with the Time Server 8030HEPTA/GPS:
+V
in
:
Positive pole (contact 1)
–V
in
:
Negative pole (contact 2)
PE:
Earth
The Time Server 8030HEPTA/GPS can be damaged if incorrect voltage is
connected.
Earthing:
By default the minus pole (-Vin) and earthing (PE) are connected sys-
tem-sided.
5.1.4.1 Power Supply Unit Specifications
All DC power supply specifications are described in
Chapter 12 Technical Data
5.1.4.2 Fusing
Pay attention to the correct fusing of the power supply when connecting the Time Server
8030HEPTA/GPS.
The corresponding performance data can be taken from the equipment nameplate. The Time
Server 8030HEPTA/GPS is currently fitted with a power supply unit with a power consumption
of max. 20VA (Standard) or 40VA (47-63Hz).
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 fac-
tory.
5.1.4.3 Reverse Voltage Protection
The version of Time Server 8030HEPTA/GPS with DC supply has reverse voltage protection.
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.