Horner-apg QX651 OCS Manuel d'utilisateur télécharger pdf (Page 19)

MAN0798-04-EN CH.3

August 20, 2009 Page 19 of 95 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 QX / 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 QX / BP and noisy devices such as

relays, motor starters, etc.

f. Shock and Vibration

The QX / 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 QX / 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.

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Horner-apg QX651 OCS Manuel d'utilisateur Page 19