Elevance® Chair Power to the Chair Theory of Operation

This illustration shows the components that affect all chair functions.

Elevance® Chair PCB

PC board regulators control and direct three different DC voltages to the appropriate connectors.

Facility Power

When the power cord is properly connected, facility power supplies 115 V~ (VAC) or 230 V~ (VAC) to the power inlet on the PC board.

Power Inlet

Supply voltage 115 V~ (VAC) or 230 V~ (VAC) comes thru the power inlet and passes thru three fuses on its way to the transformer.

Transformer

Supply line voltage 115 V~ (115 VAC) or 230 V~ (VAC) enters the transformer where it passes thru or is regulated to multiple, lower, V (VDC) voltages by three regulators.

Regulators (hardware)

Electronic devices that regulate incoming 115 V~ (VAC) or 230 V~ (VAC) into more stable, V (VDC) voltages used by the PC board.

PC Board

Circuitry on the PC board provides pathways for voltages to connected components as well as pathways for input signals to and from the microcontroller.

Microcontroller (software)

The microcontroller processes input signals received from users and sensors, then sends the appropriate output signals to activate electronically controlled components.

115 V~ (VAC) or 230 V~ (VAC) Supply voltage is supplied to

•Brake Release Solenoid thru J16

•Hydraulic Pump thru J15

•Hydraulic Valve Solenoids thru J1

•Auxiliary Output thru J2

Regulated voltages

12 V (VDC) is supplied to:

•Safety Limit Switches thru J4

•Optional Cuspidor Safety Switch thru J6

•Brake Safety Switch and Power ON Light thru J8

•Communication Ports for Control Devices and J-Box connections J9 thru J12

•Optional Cuspidor Power Connection thru J5

•Optional Light Communication thru TB1

The same regulated voltage distributed to multiple devices is commonly called a BUS.

5 V (VDC) is supplied to:

•Test Port thru J14

•Micro-controller

3 V (VDC) is supplied to:

•Back Tilt sensor thru J13

Power ON Light

When proper power is supplied to the PC Board, the power ON light illuminates.

The Power ON light operates on regulated voltage coming directly from the 12 V (VDC) BUS. The microcontroller has no connection to this light.