Vaisala AWS330, Руководство пользователя

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User's Guide ______________________________________________________________________
238 _________________________________________________________________ M211296EN-A
Table 70 Analog Measurement Channels
Channels Pin Name Description
E 12 V/25 mA voltage excitation ON/OFF,
voltage can be measured.
OR: 100
μ
A/1mA current excitation.
H Analog input (High)
L Analog input (Low)
CH0, CH1, CH2, CH3
24-bit ADC
C The pin has been connected to ground
(GND) via a 10
Ω
resistor so that the
current can be measured.
E 100
μ
A/1 mA current excitation
H Analog input (High)
L Analog input (Low)
CH4, CH5, CH6, CH7
24-bit ADC
C Common return and reference level for
voltage measurements via the channel's
own E-, H-, and L-pins. The pin has been
connected directly to ground.
F Frequency input.
E 0 ... 12 V/20 mA adjustable excitation
voltage, can be measured.
H Fast analog input (High)
L Fast analog input (Low)
CHA, CHB Suitable
for fast-changing
input signals 12-bit
ADC
C Common return (Analog ground)
Table 71 Power Channels
Pin Name Description
GND Common ground
SDI-12 SDI-12 sensor signal pin
GND Common ground
+ExtDC Power input (8 ... 30 VDC)