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NQ-E7020 Digital Call Switch

Application Manual

The NQ-E7020 is a single gang-box style wall mounted

push-button switch that allows users to initiate a normal,

urgent, or emergency call from staff locations via an

associated Nyquist intercom speaker.

The switch uses a capacitive touch button interface. A color

LED ring is used to conrm user actions and to indicate

status (for example, changing color and/or state from

solid color to blinking) or to acknowledge a button press when a user

initiates a call or when a call has been terminated. The LED status ring

is also used to indicate when Nyquist system’s call queue containing

the station’s call request is cleared or if the station’s call request is

individually cleared by the administrative station without responding.

Installation

The NQ-E7020 mounts into a standard single gang outlet box and is outtted with a standard deco-

ra plate (color based on the switch’s specic application and/or customer need).The back has four

screw-terminal connections (GND, CL, CH, 5V). These get connected to the matching terminals on

the CAN Bus source/master device using standard CAT5 cabling. Load resistance needs to be set

on the end-of-line DCS. Refer to Figure 1.

Figure 1

Publication Number 740-00075B 1811

CAN_H and CAN_L must be a twisted pair like CAT5 cabling.

CAN wiring can be daisy-chained.

All devices are internally terminated and the last switch on the bus must have the termination switch in the “ON” position.

5V and Signal Ground can be either twisted or not.

Signal Ground

CAN_L

CAN_H

5V

Digital Call SwitchDigital Call SwitchApplicable

Appliance

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