Atec hmp230 User Manual
ELECTRICAL CONNECTIONS
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2001-06-05
Vaisala HMP230 series humidity transmitters
Output quantities: Relative humidity (%), temperature ( C°/F° ) dewpoint temperature
( °C/°F ), mixing ratio (g/kg) / (gr/lb), absolute humidity (g/m³) / (gr/ft³),
wet bulb temperature ( °C/°F ), enthalpy (kJ/kg) / (Btu/lb)
Operating voltage: 24 VDC/VAC, with optional power supply module 230/115 VAC
Two analog outputs: 0...20 mA / 4...20 mA / 0....1 V / 0...5 V / 0...10 V
(channels 1 & 2)
Serial connections: RS232C interface, RS485/422 module, current loop module
Screw terminals: 0.5 mm2 ...1.5 mm2 wires ( AWG 20...16 )
Wiring diagram
MAIN BOARD
Location of main board terminals
X15
X2
X6
spare
umpers
+
-
X2
HMP230PW
1234
4
3
21
2
1
X1
Note ! The cable shield has to be connected to the cable bushing for full EMC protection.
In automation system
the galvanically isolated inputs
are recommended for current signals
Analog outputs
Serial connections
Supply voltage
X1
Supply voltage 24 VDC
max. HMP230 series 100 mA
(with re-gaining 170 mA)
HMP260 series 120 mA
(HMP230: for 24 VAC,
see the Operating Manual)
N
Mains supply voltage (115 / 230 VAC )
To control system
(To control system)
RS 232C RS 485/422
RX
GND
TX
NC
Main board HMP230 and HMP260
Digital cur-
rent loop
+RX
-RX
+TX
-TX
X2
1
2
3
4
X1
1
2
Chan nel1 +
Channel1-
Chan nel2 +
Channel2-
HI
TX
LO
HI
RX
LO
-
+
/ ~
Humidity and
temperature outputs
current/voltage
Max. load for
mA outputs 500 ohm
X6
4
Serial
3
connections
See manual for
2
details!
1
L
POWER SUPPLY MODULE
(optional)
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