Horner APG QX751 OCS - Manual (Page 19)

MAN0890-02-EN CH.3
August 20, 2009 Page 19 of 96 ECN # 979
b. Grounding
Panel box: The panel box needs to be properly connected to earth ground to provide a good common
ground reference.
Panel door: Tie a low impedance ground strap between the panel box and the panel door to ensure that
they have the same ground reference.
c. Temperature
/ Ventilation
Ensure that the panel layout design allows for adequate ventilation and maintains the specified ambient
temperature range. Consider the impact on the design of the panel layout if operating at the extreme
ends of the ambient temperature range. For example, if it is determined that a cooling device is required,
allow adequate space and clearances for the device in the panel box or on the panel door.
d. Orientation
When panel-mounted, there are no orientation restrictions on the QX751/BP. However, the orientation
shown in Figure 3.2 provides for optimum readability of the screen and ease of use of the keypad.
e. Noise
Consider the impact on the panel layout design and clearance requirements if noise suppression devices
are needed. Be sure to maintain an adequate distance between the QX751/BP and noisy devices such
as relays, motor starters, etc.
f.
Shock and Vibration
The QX751/BP have been designed to operate in typical industrial environments that can inflict some
shock and vibration on the unit. For applications that can inflict excessive shock and vibration, use proper
dampening techniques or relocate the QX751/BP to a location that minimizes shock and / or vibration.
Warning: Be sure to meet the ground requirements of the panel manufacturer and also meet
applicable electrical codes and standards.