NEXSYS® LOGIC Module
VIVISUN
  • Ruggedized, Small Form-Factor Enclosure
  • Mix-and-match nine functional electrical components for over 1,000,000 configuration options.
  • Designed and Tested to DO-160

The NEXSYS® LOGIC Module is a ruggedized, small form-factor enclosure that allows avionics system designers to mix-and-match specific electrical components and create a behind-the-panel solution to meet their exact functional requirements. The LOGIC Module is ideal for many applications such as communications systems, computer/logic level interface to electro-mechanical systems, fire suppression systems and IFE systems. LOGIC Modules can be used on a stand-alone basis or can be used in conjunction with VIVISUN® lighted pushbutton switch applications.

The LOGIC Module can be used for system-to-system interface or can be combined with man-machine interface devices such as illuminated pushbutton switches. LOGIC Modules can replace the expense and certification delays that are typically encountered when creating a circuit board to solve design challenges. With three different mounting options, LOGIC Modules deliver a powerful combination of configurable electronic components in a single robust package designed and tested in accordance with DO-160.

LOGIC Component Options

The LOGIC Module can accommodate a wide range of components with specific electronic functionality such as electronic flip-flops, solid state relays, diodes, and other more complex devices. Each LOGIC component is either a 4-pin device (shown in green) or an 8-pin device (shown in orange or red) and can occupy a position inside the body that is not already occupied by another LOGIC component.

NEXSYS® LOGIC Components
Solid State Relay Normally Open (up to 0.75 amps) or Normally Closed (up to 0.25 amps) Details
Voltage Sensor Monitor DC under-volt or over-volt condition from 1 VDC to 48 VDC Details
Diode Pack Two independent diodes available in commercial or military configurations Details
Terminal Block Rated at 5 amps Details
Electronic Latch Electronic flip-flop to replace magnetic or solenoid switches Details
Electronic Rotary Pushbutton actuation to cycle through up to four latched states Details
Pulse/Timer Dual channel, edge detecting, one-shot pulse generator from 125 ms to 20 seconds Details
Defined Logic Boolean AND, OR, NOT (inverter) and Exclusive OR logic gates up to four inputs Details
ARINC 429 Converter Single bit, single label ARINC 429 digitial-to-analog signal converter Details

LOGIC Module Configurations

A LOGIC Module has four available, 4-pin positions (H, J, K and L in the diagram below). Any 4-pin (shown in green) LOGIC component can occupy one of the available four positions.

LOGIC Modules can accomodate one or two 8-pin LOGIC components. Except for the ARINC 429 Converter, each 8-pin component (shown in orange) will occupy two of the available positions. When one 8-pin component is used, it will occupy the two middle positions, leaving two open 4-pin positions. When two 8-pin components are used they will be configured side-by-side leaving no open positions.

The ARINC 429 Converter is an 8-pin component (shown in red) that has a larger form factor than the other 8-pin components. Because of this, a LOGIC Module with an ARINC 429 Converter component will have no positions for additional LOGIC components.

Unoccupied positions will be configured with an Open spacer. LOGIC Modules require the use of Connector Plug (P/N 18-440).


Up to four LOGIC components in a single LOGIC Module

Installation & Mounting

LOGIC Modules require the use of a keyed CTS Connector Plug (P/N 18-440). The Connector Plug can be inserted into the module before or after insertion into any of the mounting variations. The Connector Plug can be removed from the module using an Extraction Tool (P/N 18-234) without removing the module from the mounting. LOGIC Modules can be mounted in one of the following three ways:

In-line Harness Boot: Module should be encased in the boot provided and secured to the harness using industry standard methods for in-line harness wiring.

Flush Mount Bracket: Enclose module in bracket and mount bracket using customer provided fasteners. Removal of the module requires unfastening of the mounting bracket. Bracket hole spacing is consistent with many standard relay mountings.

Right Angle Bracket: Bracket can be mounted (using customer provided fasteners) with or without module inserted. Slide module into bracket and ensure module has positively “clicked” into bracket. The module can be removed from the bracket (without removal of the bracket from the mounting surface) by releasing side retaining clips. Bracket hole spacing is consistent with many standard relay mountings.

Type 1 Rail: Slide the module into the rail and secure using the lock-down bar that accompanies the rail. The module can be removed from the rail by releasing the lock-down bar and sliding the module out.

LOGIC Modules will come supplied with an in-line Harness Boot. The optional brackets and Type 1 rail may be ordered seperately on our Part Configurator.


P/N 22-004
In-line Harness Boot

P/N 22-005
Right Angle Mounting Bracket

P/N 22-006
Type 1 Rail Mounting