Nematron ePC-Lite Series with N2800 CPU - Manual (Page 15)

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WARNING – EXPLOSION HAZARD – DO NOT DISCONNECT EQUIPMENT
UNLESS THE POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN
TO BE NON-HAZARDOUS. PS/2 CONNECTOR IS FOR SETUP AND
MAINTENANCE ONLY, USB CONNECTIONS MUST BE SECURED WITH
INCLUDED RETENTION BRACKET – SEE INSTALLATION INSTRUCTIONS
WARNING – EXPLOSION HAZARD – DO NOT DISCONNECT EQUIPMENT
WHILE THE CIRCUIT IS LIVE OR UNLESS THE AREA IS KNOW TO BE FREE
OF IGNITABLE CONCENTRATIONS.
NOTE: TO PREVENT INADVERTENT DISCONNECTION OF VIDEO AND/OR
SERIAL TOUCHSCREEN CABLES ASSURE THAT THE THUBSCREWS ARE
SUFFICIENTLY TIGHTENED.
NOTE: WHEN USING USB CONNECTIONS THE USE OF THE USB RETENTION
BRACKET IS REQUIRED FOR HAZARDOUS LOCATIONS AND HIGHLY
RECOMMENDED FOR NONHARDAOUS LOCATIONS.