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.