Rockwell Automation 150-E SMC Elevator Users Manual - Manual (Page 11)

Rockwell Automation Publication150-UM009D-EN-P - February 2011 11
Installation & Wiring Chapter 2
Installation Precautions The following precautions are provided as guidance for proper installation of this
controller. As this product was designed to be used in a variety of applications,
not all precautions mentioned are relevant to your particular application. In all
cases, the local codes and standards governing this type of product must be
observed.
Motor Branch Protection and Disconnecting Means
• The controller featues motor overload protection. However, it does not
have means to protect itself from a short circuit condition. Suitable branch
circuit protection and coordination must be provided per the NEC, or the
equivalent local electrical code.
Electrical Noise Suppression
• Electrical noise can be generated from various sources connected to the
same power as the controller. Sources of noise include: inductive loads (i.e.
relays and solenoids), large motors and machinery, Variable Frequency
Drives, and other high frequency devices (i.e. welders).
• Electrical noise can enter the product through power and control wiring
and cause damage to solid-state components.
• Mitigation of electrical noise can be accomplished through the following
methods:
– Proper wiring practices including grounding, use of shielded cable
where appropriate, and separation of power, control, and signaling
wires.
– Use of surge suppression devices on inductive loads.
– Use of isolation transformers for high frequency generators.
Power Factor Correction Capacitors (PFCC).
• PFCCs must always be used on the line side of the controller. Use of
PFCCs on the output side of the controller will damage the starter.