HS-50 & HS-100
Doc. No 1199-PS-0035 Issue 3
June 2021
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Page 25
12 USING THE ANALOGUE INPUTS WITH THE HS ELECTRONICS
UNIT
Introduction
The supplied HS Electronics Unit allows the user to integrate up to 6 analogue inputs into the HS
digital string, together with a PRT input. It is designed for outdoor use please see section 12.3 for
mounting details.
12.1 Analogue Inputs
The Electronics Unit provides six differential analogue inputs of 14 bit resolution. A specification for
these is given in section 6. This feature allows the user to power extra equipment local to the
Electronics Unit and to take analogue data from that equipment. The anemometer digitises the
analogue data and appends it to the digital data string
A sensor supply voltage is available at each connector. The voltage at this connector is the supply
voltage
at the HS Electronics Unit
minus 1.5 volts. The sensor supply voltage is internally
regulated to 21±2 volts for SIU supply voltages above 22 volts.
For sensors with a common supply and signal ground, this ground should be connected to Sensor
Supply -. In this situation Analogue Input - should be connected to Sensor Supply - and Analogue
Ground left floating.
The
total
current drawn from the sensor supply by all the external sensors must not exceed 70mA.
Sensor connector pin out:
1
Sensor power -
2
Analogue input 1+ / 3+ / 5+
3
Analogue ground
4
Analogue input 1- / 3- / 5-
5
Analogue input 2+ / 4+ / 6+
6
Analogue input 2- / 4- / 6-
7
Sensor power +
8
Chassis/screen
Summary of Contents for 1199-PK-085
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