
Chapter 3 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 35
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 Section Serial Line
Communication on page 80.
4. When wiring the optional modules, see the corresponding section
for instructions:
- RS-422/485 Interface on page 62
- Alarm Relays on page 60
- Third Analog Output on page 59
- LAN Interface on page 64
- WLAN Interface on page 65
5. Connect the power supply wires to the connectors: POWER
10...35V+ 24V (+) and (-) terminals. (If using AC voltage,
connect always phase to power supply (+) and 0 to power supply
(-)). When wiring the power supply module, see section Power
Supply Module on page 54.
6. Turn on the power. The indicator led on the cover lit continuously
during normal operation.
7. Close the cover and replace the cover screws. The transmitter is
ready for use.
Connections to a 24 VAC Power Supply
Separate floating supply for each transmitter is recommended (see the
upper part of Figure 18 on page 36). If you have to connect several
transmitters or other ins
truments to one AC supply, the phase (~) must
always be connected to the (+) connector of each transmitter (see the
lower part of Figure 18).
CAUTION
24 VAC POWER SUPPLY USE
To prevent fire and/or damage, if either 24 VAC wire is grounded or
connected to a "-", "0", or "GND" terminal of any other device, you
must connect the same wire on the "-" terminal also on this
instrument.
Commentaires sur ces manuels