NEXSYS® Component Technology – State Control Components

Electronic Rotary

Electronic Rotary

Summary Description

The NEXSYS Electronic Rotary (ER1) is a Series C (8 pin) electronic rotary controller that provides incremental cycling through a loop of four latched output states. The increment signal can come from successive switch closures or from a remote source.

Electronic Rotary Block Diagram

Input Characteristics

28V: Operating voltage (nom.), 4 mA current draw (max.). 

GND: Continuous ground required. 

/INC: Detects signal transitions, which function as the control interface to loop through four outputs. 

/RST: immediate activation to reset (/RST) state. /INC input has no effect when /RST is held low.

Output Characteristics

/Q1, /Q2, /Q3, /Q4: Open drain outputs are High Impedance becoming Ground when output is active. Only one output is active at a time. The output load capacity is 2.0 A (Resistive). 

The Electronic Rotary powers-up in a known state (Q1 Active). Following power-up, the /INC input will detect a signal transition, and successive transitions will activate the next sequence in a loop of four latched outputs. The number of latched outputs are reduced by wiring the next output state back to /RST (i.e., wiring Q4 to /RST creates a three-state rotary device). 

Electronic Rotary – Application Examples

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

Application Example

LED Annunciator, Off/Dim/Bright

LED Annunciator, Off/Dim/Bright This application details a circuit that turns indicators OFF/ON and adjusts their brightness with the press of a momentary switch. The latched outputs can be used to control relays or toggle discrete dimming inputs to indicators.