Connections and variables - Arc protection - Auto synchronization - Bay control and measurement - Merging unit - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Petersen Coil control - Grid automation - Busbar differential protection (high impedance) - Back-up protection - Motor protection - Busbar protection (voltage and frequency) - Transformer protection - 3 winding - Interconnection protection - Generator protection - Power management/Load shedding - Engineering Manual - REX640 Protection and control - PCL6 - IEC - ANSI - 16.02.2023

REX640 Engineering Manual

A connection is the link or "wire" between function block outputs and inputs.

Connections can be made in two ways.

  • Dragging a line between two signals
  • Linking two signals by using variables
Note: It is possible to search and replace variable names in Application Configuration tool.
Note: Connect the variables to a destination, for example to a function block or a hardware output channel. The connectivity package automatically removes the orphan variables which are not connected to any destination.
Note: Connect at least one analog input signal from AIM or SMVRCV.

Connection validation

A connection is only useful or even possible between two signals of the same base attribute type.

Figure 1. Application Configuration tool: an error message of a signal mismatch for a connection
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