How to Connect Physical I/O to the Cortex 360

Connecting Physical I/O to the Cortex

The most convenient way to connect physical I/O to the Cortex is through Davicom’s MIOP300 screw-terminal I/O panel. This rack-mount panel provides complete connection options for the differential metering inputs, the internal or externalground status inputs as well as the Form-C relay outputs.

The panel’s layout is shown below.

Specifications for the Metering inputs are:

  • 12-bit resolution
  • Bipolar/Differential inputs (up to 80V common mode rejection) with 1 MΩ input impedance
  • Selectable input ranges of 0.5, 2.5, 5, 10, 20, 40 & 80 VDC
  • Jumper-selectable 4-20mA input mode
  • Software selectable signal rectifier on all inputs

Specifications for the Status inputs are:

  • Independent grounds on each input
  • Opto-isolated
  • Impedance > 22 kΩ
  • Detection Levels: -12 to 0.8 VDC (low), +2.4 to +12 VDC (high)

Specifications for the relays are:

  • 70 VAC @ 0.4A, 30 VDC @ 2A, or open collector (100 mA)

Depending on your requirements and setup, you must also remember to connect the telephone line, the Power Fail detector wall-wart, the network and most importantly, to ground the unit with an appropriate ground wire or strap.

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