Defined Logic (Boolean)

The Defined Logic component is an 8-pin logic and interface device that replaces traditional relays and diode (Boolean) logic currently used to generate “conditional” logic applications. Defined Logic can be integrated in a VIVISUN® High Capacity switch body or can be included in a stand-alone NEXSYS® LOGIC Module for use behind the panel.

  • Replaces power or ground drop out relays
  • Boolean AND, OR, NOT (Inverter), and “Exclusive OR” capability
  • 2 and 4 input versions available
  • Able to detect changes from either power or ground
  • Low power
  • Decode up to 4 separate binary or BCD inputs
Defined Logic Block Diagram

How it Works

The Defined Logic contains an integrated electrical circuit that is configured to a defined (Boolean) logical function. The output will change state to either ground (0) or high impedance (1) when the defined input condition(s) is/are present.

Component Features

Defined Logic is available in 4 distinct variations. Each of the variations contains 4 inputs (A – D) and 2 outputs (Y and Z). See overview diagram (right). In each of the variations, the designer must also specify the default polarity of inputs A and C. The unit is factory configured at time of manufacture to the desired variation and logic level.

  • DL1: Boolean “Exclusive OR” (XOR) logic module, with 2 pairs of tied inputs and 2 orthogonal outputs
  • DL2: Dual (2) independent Boolean logic channels, each with 2 inputs and 1 output. This variation has the ability to provide straight Boolean logic, an inverter, or a buffer on each independent channel
  • DL3: 2 level cascaded logic combining output of 2 logic gates into a third logic gate
  • DL4: 4 discrete inputs and 2 orthogonal outputs

Defined Logic – Application Examples

To help system designers understand the potential of LOGIC Component Technology, we have assembled a collection of Application Notes. The links below show example applications that utilize the Defined Logic component.

Conditional Switch FunctionElectronic Switch Guard and Motor Control