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24V Binary Outputs

In this quick-start guide we will run a demo program to stimulate the SQ1-TRACK's 24 V binary outputs. Note that the firmware calls these outputs "Audio Relay", as they have been used initially to control power amplifiers in audio applications.

Prerequisites

Hardware

  • A CompactPCI Serial System with a SQ1-TRACK installed
  • A development PC (Windows or Linux), connected via Network to the CPCI Serial System

  • Networking for Ethernet-over-USB has been setup, so that the host can reach the SQ1-TRACK. See CPCI-S.0 Linux Networking

  • A laboratory power supply to provide a voltage to feed the binary Outputs

Tools on Development PC

The examples are written in programming language Go, we download the go sources and compile them. Therefore we need some tools on your development PC:

Get Demo Software

Clone the repository containing the examples to a folder of your choise (here myworkdir).

c:
cd \myworkdir
git clone https://github.com/ci4rail/io4edge-client-go.git
cd io4edge-client-go

cd ~/myworkdir
git clone https://github.com/ci4rail/io4edge-client-go.git
cd io4edge-client-go

Determine the Service Address of your SQ1-TRACK

Io4Edge Devices are usually addressed by their service address, which is a name in the network.

The SQ1-TRACK's service name depends on the geographical slot address and is usually SQ1-geo_addr-<geo-address>[-<function>], i.e. if the SQ1-TRACK is in the slot with geographical address 04, we have the following service names:

Service Name Description
SQ1-geo_addr04 Core function
SQ1-geo_addr04-binio Binary I/O function
SQ1-geo_addr04-audiorelay 24V Binary Output function

We need this service address in the demo programs to address the module, for example SQ1-geo_addr04-audiorelay.

If you are unsure, you can also browse the available devices:

io4edge-cli scan -f

If your SQ1-TRACK is in the slot with geographical address 04, the output should be: 

DEVICE ID       SERVICE TYPE                    SERVICE NAME                    IP:PORT
SQ1-geo_addr04  _io4edge-core._tcp              SQ1-geo_addr04                  192.168.205.1:9999
                _io4edge_binaryIoTypeD._tcp     SQ1-geo_addr04-binio            192.168.205.1:10000
                _io4edge_binaryIoTypeB._tcp     SQ1-geo_addr04-audiorelay       192.168.205.1:10001

24V Binary Output Demo

For the binary output demo we stimulate it via software and observe the front panel LEDs. Optionally, you can connect a multimeter or oscilloscope to one of the outputs to measure the voltage.

Connecting

Only required if you want to measure the output voltage with a multimeter or oscilloscope: Connect the GND and 24V pins of the D-Sub connector to your power supply and measure A and B outputs with your measurement device.

Connection for Binary Output Demo

Demo Software

Compile Demo

Run this in a powershell console

cd examples\binaryIoTypeB\set_outputs
$Env:GOOS = "linux"
$Env:GOARCH = "amd64"
go build

cd examples/binaryIoTypeB/set_outputs
GOOS=linux GOARCH=amd64 go build

This produces the binary file set_outputs in the current folder.

Copy Demo to CompactPCI Serial CPU

Transfer the compiled binary. Replace <target-ip> with the IP address of your CompactPCI Serial CPU.

scp set_outputs <target-ip>:~/.

Running the Demo

Login into your CompactPCI Serial CPU over SSH:

ssh <target-ip>

Once logged in into the CompactPCI Serial CPU's Shell, run the demo.

./set_outputs SQ1-geo_addr04-audiorelay
You should see LED A and B turning yellow when the corresponding output is activated.

On your measurement device you should see a voltage of 24 V when the output is activated.

INFO[0000] Set outputs to 0  # (both off)
INFO[0001] Set outputs to 1  # (output 1 on)
INFO[0003] Set outputs to 2  # (output 2 on)
INFO[0004] Set outputs to 3  # (both on)