Vaisala HMP228 - Manual (Page 47)

HMP228
M210282en-A Operating Manual
41
5.5 Electronics
User interface 3 keys and 4 LEDs inside the
housing or local display keypad
Display 2 x 16 character alphanumeric
high-contrast, wide view angle
LCD
character height 3.85 mm (0.15")
Keyboard 1 x 4 keypad
Connections screw terminals, 0.5 mm 2 wires
(AWG 20), stranded wires
recommended
Operating voltage 24 VDC / isolated 24 VAC
(20...28 V)
option 115/230 VAC with power supply
module
Power consumption 100 mA maximum (24 VDC)
of the alarm relays 55 mA max (24 VDC)
Recommended external load for
current outputs
<500
Ω
0...1 V voltage output >2 k
Ω
(to ground)
0...5 and 0...10 V voltage outputs >10 k
Ω
(to ground)
Operating temperature (electronics) -40...+60 °C
with display cover 0...+50 °C
with power supply module -40...+45 °C
with alarm outputs up to 8A -40...+45 °C
with alarm outputs up to 6A -40...+60 °C
Storage temperature -40...+70 °C
Pressure range of the HMP228 0...40 bar
sensor head
5.6 Mechanics
Housing material G-AlSi12 (DIN 1725)
Housing classification IP 65 (NEMA 4)