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Document Part # 026-4055 Rev 3

Page 1 of 3

©2020 Emerson Retail Solutions, Inc. This document may be photocopied for personal use. 
Visit our website at http://www.emerson.com for the latest technical documentation and updates.

The Site Supervisor 21.5-Inch Touchscreen Display 

(P/N 818-7242)

 is a remote user 

interface for the Site Supervisor that connects to the controller using the Ethernet 
network through the Ethernet port. The Site Supervisor UI allows users to perform critical 
actions in the controller quickly. Functions such as lighting overrides, controlling heating 
and cooling stages, status information, and viewing alarms can all be performed using the 
21.5-Inch Display.

For a copy of the full Site Supervisor Guide 

(P/N 026-1800)

, go to http://www.emerson.com or contact Emerson Customer 

Service at 770-425-2724.

Display Connections

General Warnings and Safety Precautions

•The Display should not be used for purposes different from those described in this guide. 
It cannot be used as a safety device.

• When using an external power supply, it is necessary to separate the power of the device from 

the rest of the electrical devices connected inside the electrical panel. 

• Disconnect all electrical connections before any kind of maintenance is performed. 
• Do NOT open the Site Supervisor Display. Do NOT open the panel rear cover when power is 

applied.

• Check that the supply voltage is correct before connecting.
• Do not expose to water or moisture: use the controller only within its operating limits to avoid 

sudden temperature changes with high atmospheric humidity to prevent condensation.

• Wire polarity must be observed: a wrong connection may cause possible malfunctioning and 

damage to the controller or Display.

Display Connections

            

         21.5- Inch Display

Quick Start Guide

Site Supervisor 21.5-Inch 
Touchscreen Display

 

                 21.5-Inch Display

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