Mettler Toledo M300 FLOW Especificaciones Pagina 18

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Transmitter O
2
M300 18
© 05/07 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter O
2
M300
Printed in Switzerland 52 121 305
4.2 Connection of power supply
All connections to the transmitter are made on the rear panel of all models.
Be sure power to all wires is turned off before proceeding with the installation. High voltage may
be present on the input power wires and relay wires.
A two-terminal connector on the rear panel of all M300 models is provided for power
connection. All M300 models are designed to operate from a 20–30 VDC or a 100 to 240 VAC
power source. Refer to specifi cations for power requirements and ratings and size power wiring
accordingly.
The terminal block for power connections is labeled “Power” on the rear panel of the transmitter.
One terminal is labeled – N for the Neutral wire and the other +L for the Line (or Load) wire.
There is no earth ground terminal on the transmitter. For this reason the internal power wiring
within the transmitter is double insulated and the product label designates this using the
symbol.
4.2.1 1/4DIN housing (panel mount)
1 Connection of power supply
2 Terminal for sensor
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