Event Logging - GPIO Installation guide

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GPIO Pin Description      

Pin GPIO Cable Colour Name Description
1 Red

Non-isolated +3.3 VDC voltage signal

The +3.3VDC rail is intended to power such things as input sensors
It is current limited to 100mA to protect the Spider in the event that this output is shorted

2 Black Non-isolated ground General purpose ground
3 Grey Non-isolated input 1 with basic protection

The basic protection consists of current limiting resistors and TVS diodes
There is provision for adjusting the default Low-Pass frequency of 106kHz
Maximum voltage is +3.3 VDC 

4 Yellow Non-isolated input 2 or analogue input
5 Orange Isolated output ground The isolated outputs share a common ground connection. This is separated from the Spider Ground
6 Blue Isolated output 1

The isolated output has an open collector configuration. The specification must be strictly followed.
An open collector output allows the 3rd party to pull the voltage up to a large range of voltages and the Spider will drive this voltage low to activate the output.

IMPORTANT

  • Maximum voltage is +80 VDC
  • Maximum current must be kept < 30 mA
    • This is done by selecting an appropriate resistor value
  • Failure to limit the current and/or voltage will result in permanent damage to that particular output port
7 Brown Isolated output 2
8 Purple Isolated input ground

The isolated inputs share a common ground connection. This is separated from the Spider Ground

9 White Isolated input 1

Voltage input range of +3.3 VDC ~ +12VDC (Absolute Max +15 VDC) without 620 ohm resistor.

Voltage input range of +9 VDC ~ +32VDC with 620 ohm resistor.

IMPORTANT

  • Failure to limit the current and/or voltage will result in permanent damage to that particular input port

 

Location of Pins

 image2015-8-10_14-46-55.png

GPIO pin usage:

The Isolated GPIO input is quite different to the Non-isolated GPIO input:

  • To detect a situation where it is either ground or no ground, we should use a Non-isolated GPIO input;
  • In a situation where we need to detect a signal either a voltage or a ground, we should use an Isolated GPIO input.
  • Also we should always make use of the Isolated GPIO input common ground pin when we want to use an Isolated GPIO input;
  • the voltage or ground must be recognized by the Spider GPIO interface for it to work.

Input Signal Classification

The GPIO input signals can be classified as below:

Case Input Signal Example Input Signal Value GPIO Input Pin
1 Ground/Disconnect

ground/no ground

Pin 3 or Pin 4
2 Pin 9 or Pin 10
3 Pin 9 or Pin 10
4

Voltage/Ground with signal isolation

(signal separation is done by a diode)

24V/ground

12V/ground

Pin 3 or Pin 4
5 Voltage/Ground

24V/ground

12V/ground

Pin 9 or Pin 10
6 Pin 3 or Pin 4
7

Voltage/Voltage

 

24V/1V, input source voltage is 24V

Pin 9 or Pin 10

Note in this case only one isolated

input pin can be used since pin 9

and pin 10 share the common

ground pin 8.

8

Pin 3 or Pin 4

A NO (normally open) relay is

used in this case.

 

   
Case
Installation suggested
1

2

3

4

5

6

7

8

 

 

 

 

 

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