User`s guide

Chapter 4 ________________________________________________________________ Installation
Wiring
The 17-pin M23 male connector is located at the bottom of
WMT700. The connector is used for power supply, digital
communications, and analog outputs. The signals related to digital
communications are galvanically separated from the ground. The
connector type is Hummel 7.106 series.
Cables
Ready-made cables are available for use with Vaisala MAWS and
AWS520 systems. These cables have connectors on both ends.
There is also a retrofit cable for Vaisala ROSA system in case
analog output has been used with WS425.
Vaisala provides open-lead cables for connections to other host
systems:
- Cable 2 m (227567SP)
- Cable 10 m (227568SP)
- RS485 Cable 2 m (228259SP)
- RS485 Cable 10 m (228260SP)
- ROSA Cable 10 m for Analog Outputs (231425SP)
- Junction Box with Cable 2 m (ASM210719SP)
Cable 2 m and Cable 10 m carry through all signals from
WMT700 while the RS485 cables are designed for RS485
operation with a limited number of wires. The ROSA Cable is
intended for replacing WS425 with WMT700 in the Vaisala
ROSA system if WS425 is connected using analog outputs. The
Junction Box is designed mainly for maritime RS422 operation
but it can be used whenever a connection longer than 10 meters is
needed as an entry point for an extension cable.
Table 22 on page 78 shows how to connect Cable 2 m
(227567SP) and Cable 10 m (227568SP). Same color coding is
also used in Junction Box wiring.
Table 24 on page 80 shows how to connect RS485 Cable 2 m
(228259SP) and RS485 Cable 10 m (228260SP).
NOTE
Wire colors in the tables are not applicable to other cables.
NOTE
If there are unused wires, make sure that they are unconnected and
protected. Do not cut off
any wires.
VAISALA ________________________________________________________________________ 77