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RT430/434
Grounding (Earthing)
GNSS Antenna Terminal
28
For AC power connection, the phase conductor must be applied to terminal (+/L),
neutral conductor to terminal (-/N) in each of the supply terminals identified, Power 1
and Power 2.
For DC power connection, the positive line should be applied to terminal (+/L),
negative to terminal (-/N) in each of the supply terminals identified, Power 1 and
Power 2.
For compliance with IEC 61010, install a suitable external switch or circuit breaker in
each current-carrying conductor of RT430/434 power supply; this device must
interrupt both the hot (+/L) and neutral (-/N) power leads. An external 10 A, category
C, bipolar circuit-breaker is recommended. The circuit breaker should have an
interruption capacity of at least 25 kA and comply with IEC 60947-2. The switch or
circuit-breaker must be suitably located and easily reachable, also it must not
interrupt the protective ground conductor.
To ensure proper operation of the equipment under extreme electromagnetic
conditions, connect the equipment protective ground terminal to the panel using a
copper strap of at least 10 mm width as M6 ring lug.
Figure 10: RT430/434 Grounding Strap
A 3.3-Volt active GNSS antenna (100 mA max loading) must be connected to the
antenna input terminal when satellites are being used as time reference.
If the GNSS antenna is connected and it is possible to receive signal from at least 4
satellites the L
indicator will start to blink after a couple of seconds, indicating
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that the internal time-base is being synchronized with the satellites. The L
indicator will stop blinking and will remain lit as soon as maximum accuracy is
achieved. This process may take several minutes if the equipment was transported
Figure 11: GNSS antenna connector
Chapter 4 – Installation
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RT430/434
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