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System Components: XIO – Multiple Input/Output Controller


The XIO module is a multiple input/output controller used in our automation and control systems. This module is characterized by its unique architecture, compactness and compatibility and uses a TCP/IP communication protocol.


XIO Module
XIO Module

Unique architecture

The XIO module is equipped with input / output logic, analog and frequency input-outputs, each type in a calculated proportion that just one type of module is needed to control an asphalt plant. Thus, a small application requires one and only one XIO. To increase capactiy additional XIOs, all identical to the first one, can be added to increase the number of input-outputs.

The advantages of this architecture are numerous:

  • Only one module is needed as a spare part
  • Guaranteed flexibility and extensibility
  • Simplified wiring
  • Support and maintenance facilitated
  • Small overall dimensions

Comparison with traditional architecture
In a traditional installation using a field network, electronic modules ensuring the input-outputs are specialized according to the type of signals: logic inputs, logic outputs, analog inputs, analog outputs, etc.. this architecture multiplies the number and types of electronic modules (refer to Figure 1). With the XIO, only one standard device is necessary, having all the types of input-outputs onboard (refer to Figure 2). When the number of input-outputs is very important, the cost of the two solutions is similar, but on small and average installations, in an example of road construction plants, the architecture of XIO reduces costs and becomes more profitable.


Figure 1 - Classical Architecture
Figure 2 - XIO Architecture

Main features

  • Two (2) isolated analog outputs (six (6) with optional extension)
  • Four (4) isolated analog input (12 with option extension)
  • 32 scalable up to 56 logic outputs
  • 40 scalable up to 64 logic inputs (or analog inputs, individually configurable)
  • Six (6) quadrature/12 single optical encoder inputs
  • 2500 Vrms isolation (1 min)
  • Ethernet communication
  • DIN Rail mounting

Technical Specifications

  • Operating temperature: 0 to 50 °C (32 to 122°F)
  • Humidity: 5 to 95% non condensing
  • Storage temperature: -40 to 85°C (-40 to 185°F)
  • Dimensions mm (inches): 240 (9.4) x 105 (4.1) x 41 (1.6)

Analog Outputs

  • 12 bits, 0-10V, maximum load = 2kΩ
  • Differential nonlinearity (DNL) = +/- 0.5 LSB
  • Integral nonlinearity (INL) = +/- 3.5 LSB
  • Offset error = +/- 4 mV
  • Full scale error = +/- 2 LSB
  • Accuracy = 10V +/- 0.1%
  • Noise < 1ppm p-p (0.1Hz – 10Hz)
  • Short circuit protection by fuse (62.5mA)

Analog Inputs

  • 24 bits (NO MISSING CODE)
  • INL: 0.0012% of full scale
  • Measuring Scale: 0-20mV, 0-40 mV, 0-80 mV, 0-160 mV, 0-320 mV, 0-625 mV, 0-1.25 V, 0-2.5 V, 0-5 V, 0-10 V
  • Automatic calibration
  • Maximum common mode voltage = 50V (limited by ceramic capacitor)
  • Common mode rejection = 120dB
  • Normal mode rejection (60Hz or 50Hz) = 100dB
  • Input impedance : 400kΩ

Logic Outputs

  • Open drain output type
  • Short circuit protection: 0.9A
  • Over temperature protection
  • Short circuit and open load detection for each output
  • Over voltage protection

Logic Inputs (XEL interface connected)

  • 25ms switch debouncer
  • 24V input with 4V threshold

Non Isolated Analog Inputs (with XIE interface connected)

  • Possibility of 64 non-isolated current (4-20mA) inputs
  • 12 bits (NO MISSING CODE)
  • Integral Linearity Error = ±2 LSB
  • Differential Linearity Error = ±0.8 LSB
  • Offset Error = 10mV ±3 LSB
  • 2.5V Reference
    -Accuracy = 2.5V +/- 0.2%
    -Noise = 35μVrms (typ) (10Hz – 10kHz)
  • Maximum input voltage = 3.3V

Optical Encoder Inputs

  • Six (6) inputs over two (2) channels (quadrate decoder mode) or 12 inputs over one (1) channel
  • Digital glitch filter on each input
  • 16 bit counter
  • Configuration: counter mode/frequency mode
  • Accept all type of inputs (open drain, open emitter, totem pole, push pull)
  • Input current = 10mA

Main Board Components

  • CPU 66MHz, Coldfire 32bits with 1kbyte cache memory
  • 16 MB of SDRAM (32 bits)
  • 8 MB of FLASH (16 bits)
  • One (1) Ethernet port 100Mbits
  • One (1) RS232 Serial port
  • One (1) Real time clock
  • One (1) Reprogrammable FPGA
  • One (1) 3.3V 2A Power supply
  • One (1) 5V 2A Power supply
  • One (1) 1.5V 1.2A Power supply

Isolation

  • Analog modules are isolated from one another
  • Isolation barrier = 2500Vrms

Expansion/Extension

The board has two buses. The first is for CPU bus extensions where you can add a peripheral card like USB, touch screen monitor, mouse, RS-485, etc.


The second bus is a SPI type and has the ability for connecting two external cards providing two (2) analog outputs and four (4) analog inputs each. The electrical characteristics of those modules are the same as the one on the motherboard.


Datasheets