Vaisala DRYCAP DMT345 Betriebsanweisung Seite 42

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Seitenansicht 41
USER'S GUIDE____________________________________________________________________
42 __________________________________________________________________ M210762EN-D
WARNING
Make sure that you connect only de-energized wires.
1. Open the transmitter cover by taking out the four cover screws.
2. Insert the power supply wires and signal wires through the cable
bushing in the bottom of the transmitter; see the grounding
instructions in the previous sections.
3. Connect the analog output cables to terminals: Ch1 +, Ch1-, Ch2+,
Ch2-. Connect the RS-232 user port cables to terminals RxD, GND
and TxD, more about the RS-232 connection in Serial Line
Communication on page 72.
4. When wiring the optional modules, see the corresponding section
for instructions:
- Installation and Wiring of RS-422/485 Interface on page 53
- Installation and Wiring of Alarm Relays on page 51
- LAN Interface on page 56
- WLAN Interface on page 57
NOTE
The markings on the module and in this manual are according to the line
driver manufacturers’ application notes, where A is posive against B
when measured with a voltmeter.
When connecting the module, be prepared to swap the A and B wires if
you have a communication problem.
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