Technical Information
OUTPUTS
Two analogue outputs 0...20 mA
selectable and scaleable 4...20 mA
0...1 V
0...5 V
0...10 V
Typical accuracy of analogue ±0.05 % full scale
output at +20 °C
Typical temperature dependence 0.005 % full scale/°C
of analogue output
Serial output available RS 232C
GENERAL
Connections screw terminals for 0.5 mm
2
wires (AWG 20), stranded
wires recommended
Operating voltage 24 VDC/isolated 24 VAC
(20...28 V)
option 115 VAC, 230 VAC
Power consumption
without alarm relays 100 mA max. (24 VDC)
during re-gaining 170 mA max. (24 VDC)
of the alarm relays 55 mA max. (24 VDC)
Recommended external load for
current outputs < 500 ohm
0...1 V output > 2 kohm (to ground)
0...5 & 0...10 V outputs > 10 kohm (to ground)
Operating temperature range for electronics -40...+60 °C
with display cover 0...+50 °C
with power supply unit -40...+45 °C
with alarm outputs up to 8A -40...+40 °C
up to 6A -40...+60 °C
Storage temperature range -40...+70 °C
Pressure range of
HMP234 0...10 MPa (0...100 bar)
HMP238 0...4 MPa (0...40 bar)
absolute pressure
Housing material G-AlSi12 (DIN 1725)
Housing classification IP 65 (NEMA 4)
Bushing for 7...10 mm diameter cables
(8 x 0.5 mm
2
shielded cable)
Electromagnetic compatibility - filter types
sintered PPS grid with PPS grid
steel netting
HMP231 EMC EMC emc
HMP233/ +80 °C cable emc emc emc
HMP233/+120 °C cable emc EMC emc
HMP234 EMC emc emc
HMP235 EMC EMC emc
HMP238 EMC not available emc
OPTIONS
Output variables — depend on model type
measured relative humidity
temperature
calculated dewpoint temperature
mixing ratio
absolute humidity
wet bulb temperature
enthalpy
Sensor re-gaining composite RH+T sensor
Cover local display/keypad
display 2 x 16 characters' LCD
Filters sintered filter of stainless steel
(Ø 13.5 mm) PPS grid with steel netting
PPS grid
Cable lengths 2, 5 or 10 metres
HMP233 +80 or +120 °C cable
HMP234, HMP235 & HMP238 +180 °C cable
Alarm relays* 2 relays 8A / 230VAC/24 VDC SPCO
Installation flanges aluminium and
for the HMP235 stainless steel
Installation kits duct mounting installation
for the HMP233 kits for +80 and +120 °C cables
POWER SUPPLY MODULE*
Operating voltage 115 VAC (93...127 V)
230 VAC (187...253 V)
Connections
input screw terminal for
1.5 mm
2
wires (AWG 16)
output screw terminal for
0.5 mm
2
wires (AWG 20)
The power supply module can not be used when the sen-
sor re-gaining option is included in the transmitter.
SERIAL INTERFACE MODULES
Module types RS 485/422
digital current loop
Connections screw terminals for 0.5 mm
2
wires (AWG 20), stranded
wires recommended
Assembly plug-in module
Number of devices on line
RS 485/422 32
digital current loop 6 (single loop) or 9 (dual loop)
Network cable type twisted pair
Network line length 1000 m max.
Network data speed
RS 485/RS422 9600 baud max.
digital current loop 4800 baud max.
EMC = fully electromagnetically compatible: IEC 801-3, 10 V/m
emc = electromagnetically compatible: IEC 801-3, 3 V/m
* Simultaneous installation with alarm outputs and power
supply module is not possible. Neither of them is available
for the HMP231.
(137 pagine)
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