Make sure that you prepare or connect only de-energized wires.WARNING!
Do not perform installation or maintenance procedures when there is a
risk of thunderstorm or lightning activity in the area.
WARNING!
A long cable between units (sensors, transmitters, power supplies, and
displays) can cause a lethal lightning-induced current surge. Always ground the
enclosure to a suitable grounded location with a short, low-resistance cable.
WARNING!
4.11.6 Wiring in Retrofit Installations
There are two ways of performing WMT700 retrofit installation:
• Using standard WMT700 cables
• Using WS425 cables with adapters
To avoid unnecessary connectors and maximize long-term reliability, Vaisala recommends
that you use the WMT700 cable for the
retrofit installation.
4.11.6.1 Using Standard WMT700 Cables
This is the recommended way for the retrofit installation. There are various cables available
for the installation:
• Cable 2 m (227567SP)
• Cable 10 m (227568SP)
• Cable 15 m (237890SP)
• Cable 26 m (237889SP)
• RS-485 Cable 2 m (228259SP)
• RS-485 Cable 10 m (228260SP)
• ROSA Cable 10 m for Analog Outputs (231425SP)
• MAWS Cable 10 m (227565SP)
• AWS520 Cable 10 m, Shield connected to PE pin (229807SP)
• AWS520 Cable 10 m, Shield not connected to PE pin (227566SP)
4.11.6.1.1 ROSA Cable 10 m (Analog Outputs)
The ROSA Cable 10 m (231425SP) is intended for replacing WS425 with WMT700 in the
Vaisala ROSA system in case the WS425 has been connected using analog outputs. The
following table shows the wire colors and related signals on WMT700.
Chapter 4 – Installation
93
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