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Installation guidelines for the ET 100
• Mount the radiation sensor directly on the PV generator with the same alignment
and angle of inclination.
• Allocation of the connection cable:
Brown:
Measuring signal, temperature sensor (10 mV / °C)
Orange: Measuring signal, solar radiation (1 V / [1000 W / m
Red:
Plus voltage (5 V)
Black:
Ground (GND)
• As connection cable to the inverter, use a 4-core, color-coded and shielded signal
cable with an approx. 0. 2 mm
length (under 30 m = 0.15 mm
do not install the signal cable parallel to the power cables.
• Connect the cable directly to the inverter in accordance with the terminal
allocation.
4.3.5 Connection of a digital counter
The impulse output of a digital counter is connected to the AC power acquisition on
the "S0" terminals. This must be activated via the "SITOP Service Module" software.
The values actually measured by the counter are not indicated on the inverter until
then. The impulse constant of the current counter can be set with this software within
a range from 256 to 10,000 impulse/kWh.
4.4 Commissioning
The devices have been checked at the plant and calibrated so that commissioning
can be performed immediately after installation.
Proceed as shown below.
Do not turn on the device yet!
• Check screwed glands on the inverters for tightness. Check poles!
• Check all screws of the connection terminals on the installation system and on the
inverters for tightness.
• Check polarity of the solar generator (+ and -) and then connect the generator.
• Check voltage of the solar generator!
• Connect power and check.
• If necessary, check voltage between L1 and N.
• Secure cover plate of the connection area with screws.
Never work on the opened device during operation!
The power switch on the front of the master is switched to "ON." When the power
voltage and the voltage of the solar generator are correct, the device performs a self-
test, checks the mains quality (from approx. 30 seconds to 20 minutes) and connects
automatically to the power.
Siemens AG
C98130-A7580-A1-1-7619
SITOP solar
08/2006
2
copper cross section depending on the cable
2
, over 30 m = 0.25 mm
2
])
2
). To prevent interference,
Page 16 of 34
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