DDAC :: Input/Output

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Input and output modules

The input / output modules can almost be stand alone although it makes more sense to connect to a modem or a historian. For example in a simple field data acquisition system such as a remote weather station or dam / river height gauge, an analogue input module could be connected directly to a GSM modem to transmit data over the mobile phone network.

Conversely, more complex systems can be built by connecting to a third party supplied PLC over Modbus, to a DDAC historian or to a DDAC smart module with a special purpose advanced controller.

The following standard input / output modules are available:

  • 8 input analogue module for 4-20 mA or 0-10 volts
  • 4 output analogue module for 4-20 mA or 0-10 volts
  • 16 input digital module - 24 volts DC or switched input
  • 16 output digital module - 0-24 volts DC

Specialist I/O modules may be available on a specific order.