Vaisala HUMICAP MMT330 Guida Utente Pagina 39

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Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 37
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. For more information about the RS-232 connection refer
to section Serial Line Communication on page 78.
4. When wiring the optional modules, see the corresponding section
for instructions:
- RS-422/485 Interface on page 56
- Relays on page 55
- Third Analog Output on page 53
- LAN Interface on page 61
- WLAN Interface on page 62
5. Connect the power supply wires to the connectors: POWER
10...35V+ 24V~ (+) and (-) terminals. If you are using 24 VAC
power supply, see the note below before connecting the supply
wires.
6. Turn on the power. The indicator LED on the cover is lit
continuously during normal operation.
7. Close the cover and replace the cover screws. The transmitter is
ready for use.
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