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2
HARDWARE
INTERFACE
DESCRIPTION
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The connections are divided into different areas:
• a “hot area” which is connected to line voltage;
• a “cold area” which is separated from line voltage and safe to touch.
This includes all sensors, display, and low-voltage signals; and
a barrier in the housing, makes it possible to route low voltage cables
and keep power cables separated.
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Signal lines must be separated from power lines
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Relay RL8 can both be used as a signal relay or power-relay. In case it is
used for power, the cable must be routed together with the power-cables.
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Maximum cable length for signal and sensor cables is 3 meters. A cable
length of more than 3 m could alter the EMI performance.
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All protective earth lines, PE, in the application must be connected to one
star point.
The star-point is normally a screwed terminal on the chassis This prevents
loop currents which could cause problems concerning the electronic
components, communication lines and sensors.
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RCCBs (Residual Current Circuit Breakers) is recommended for safe
installation.
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The controller must be protected by a circuit breaker, type C, 16-20A.
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L and N connection must be respected for polarized power-cords.
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Connecting the Modbus communication line between two devices when
the cable is installed outside the building or between two buildings is not
allowed. This prevents potential induction problems, in case of lightning.
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The display connection is used to connect the Secop display CRA 162, 172,
and 200. Please refer to the hardware specifications for approved operating
conditions.
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Installation may only be done by trained personal.
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Do not remove the cover of the inverter when the unit is powered.
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Disconnect from power and wait 30 seconds before accessing terminals.
2.1
In General
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