Anaconda Interface Spec v11
Anaconda Interface Spec v11
Anaconda Interface Spec v11
SPECIFICATIONS
Version 1.1
Author : Shing Lee
TABLE OF CONTENTS
1 Descriptions
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2
2 User accessible ports
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2
2.1 Digital In
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2
2.2 Digital Out
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3
3 Voltage and Temperature Monitoring
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3
4 System Interface
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4
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1 Descriptions
Anaconda is one of the addin daughter cards for the Hawking (WR41) range. It is designed to
fulfil the requirements as set out by CNL whose end client is the Environment Agency. Further
considerations have been given to allow the card to be used as a generic telemetry digital I/O
card. The following outlines the functional features of the card.
• 1248V supply voltage input
o fully isolated
o polarity reversal protected
• Relay in / out port (60W – 5A at 30Vdc resistive load)
• Optoisolated digital input
• Four optoisolated digital output ports
• Input supply voltage monitoring (0.02V resolution)
• Internal temperature monitoring
The following diagram depicts all the user accessible ports available on Anaconda. All the ports
provide an isolation of a minimum of 1500Vrms.
2.1 Digital In
The digital input port can be set, via an onboard jumper setting (J1, 3x2 pin header) to one of the
following configurations as shown in the diagram. In configuration A, the 12V input from the
Vin port is used to “power” the downstream device, a microswitch for example. The digital
input port can be used as a passive input port when configured in mode B.
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2.2 Digital Out
The digital output port presents a transistor output as in emitter and collector pair.
A microcontroller is available onboard to monitor the internal temperature of the unit as well as
the voltage level presented at the Vin port. Data is presented to the host processor over one of
the serial UART communication channels. Note that the microcontroller will only transmit the
measured data periodically but will not accept data from the host. The format of the serial data is
as followed. Data are presented in ASCII format.
Byte 1 2 3 4 5 6 7 8 9
0x0A Temperature not used not used not used
Byte 10 11 12 13 14 15 16 17
not used not used voltage (V2) voltage (V1)
Use the following equation to convert the received raw temperature data into temperature in
Celsius:
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T (oC) = (((temp * 2) – 161) * 423) / 1024
Voltage (V1) measures a voltage ranging from 0 to 16V whilst voltage (V2) from 16 to 60V.
Voltage_1 = ((V1 * 6) / 101.277) + 1
Voltage_2 = ((V2 * 6) / 24.756) + 1
4 System Interface
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