H38x/EN GL/D11 Global Documentation
Page 36/53
DS Agile H38x
6. MAKING CONNECTIONS TO THIS PRODUCT
As well as connections to the Ethernet networks, this product requires auxiliary power supply
connection and safety earth connection. Alarm outputs are provided and these should be
connected for system supervision. IRIG-B is available for connection for local time
synchronisation.
The locations of the various connection points are shown in the diagram below.
FIGURE 8: H38X CONNECTION POINTS
This product must be connected to earth according to product safety standard EN60950-
1:2006 clause 5.1, using a protective conductor (earth) terminal located on the bottom of the
case.
6.1 Connection of the protective conductor (earth)
This product must be earthed for safety reasons by connecting a protective conductor (earth)
to a terminal which is marked with the protective earth symbol.
WARNING – TO PRESERVE THE EQUIPMENT'S SAFETY FEATURES
THE PROTECTIVE CONDUCTOR (EARTH) MUST NOT BE
DISTURBED WHEN CONNECTING OR DISCONNECTING
FUNCTIONAL EARTH CONDUCTORS, SUCH AS CABLE
SCREENS, TO THE PCT STUD.
THE PROTECTIVE CONDUCTOR MUST BE CONNECTED FIRST, IN
SUCH A WAY THAT IT IS UNLIKELY TO BE LOOSENED OR REMOVED
DURING INSTALLATION, COMMISSIONING OR MAINTENANCE. THIS
MAY BE ACHIEVED BY USE OF AN ADDITIONAL LOCKING NUT.
The protective conductor (earth) must be as short as possible, with low resistance and
inductance. The best electrical conductivity must be maintained at all times, particularly the
contact resistance of the plated steel stud surface. The resistance between the product’s
protective conductor (earth) terminal (PCT) and the protective earth conductor must be less
than 10 mΩ at 12 Volt, 100 Hz.
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