Instruction manual

2. Preparation for Installation
86
2.4 Notes on Electrical Noise
Electrical noise emitted by other instruments can cause failures.
Note the following points when designing an electrical power equipment plan:
z The branch circuit of a power supply to the device should not be accompanied with devices or instruments that have
a relay or micro switches to turn it on and off repeatedly, such as air conditioners.
z The service ground terminal of the device (Type D grounding) should directly connect to the ground plate or, if
possible, a dedicated ground system for the device.
z As for the devices and the instruments emitting electrical noise, embed a circuit to prevent noise generation.
z The cables connected to the device are roughly categorized into power supply cables and signal cables, which are
basically different in electrical characteristics. Avoid banding or twisting both types of cables when laying them.
z Do not route the communication lines along the power supply cables.