Vaisala HMP228 - Manual (Page 80)

HMP228
Appendix 3: Power supply module
M210282en-A
74
2. INSTALLING THE POWER SUPPLY MODULE
The mains power connection may be connected to the power supply module
only by an authorized electrician. A readily accessible disconnect device shall
be incorporated in the fixed wiring (IEC 950).
1. Remove the plastic plug in the transmitter housing and replace it with the
cable gland.
2. Fasten the power supply module to the bottom of the housing with four
screws
3. Select the correct mains voltage with voltage selector switch (115/230).
4. Attach the grounding wire screw (M4) and washer to the protective
ground terminal on the right-hand side of the module.
5. Attach the wires from the power supply module to the power terminal on
the main board of the transmitter (see figure below).
When the power supply module is on, the power on LED is lit.
NOTE The jumper in connector X3 has to be in position ON; otherwise no power is
supplied to the transmitter.
-
~
2
4
V
+
~
from power supply module
BLK
RED
BLK
RED
replace plastic plug with cable gland
for O 7...12 mm cable
AC mains terminal
4 pcs M3 screws for mounting
(prefix with fibre washers)
voltage selector switch
115/230 VAC
M4 screw and washer for
protective ground terminal
- +
- + - +
L
N
+
-
update the instrument label with
the correct supply voltage label
according to the selected operating
voltage
power supply cable: strip wires
only 5 mm
use crimped terminal for ground wire if
stranded wire is used
probe cable gland
signal cable gland
arrange signal cable wires so that
they do not reach bare AC wires
when the cover is closed
X3
on off