Aerotech A3200 - Minimizing Conducted, Radiated, and System Noise; I;O and Signal Wiring Requirements; Table 2-3: I;O and Signal Wiring Specifications; Table 2-4: Recommended Wire Sizes

HEXRCHardware Manual Installation and Configuration
2.2.2. Minimizing Conducted, Radiated, and System Noise
To reduce electrical noise, observe the following wiring techniques.
1. Use shielded cable to carry the motor current and tie the shield to the connector backshell.
2. Use a cable with sufficient insulation. This will reduce the capacitive coupling between the leads that,
in turn, reduces the current generated in the shield wire.
3. User connections to the product must be made using shielded cables with metal D-style connectors
and back shells. The shield of the cables must be connected to the metal back shell in order for the
product to conform to radiated emission standards.
4. The HEXRC is a component designed to be integrated with other electronics. EMC testing must be
conducted on the final product configuration.
2.2.3. I/O and Signal Wiring Requirements
The I/O, communication, and encoder feedback connections are typically very low power connections. In
some applications, especially when there are significant wire distances, a larger wire size may be required to
reduce the voltage drop that occurs along the wire. This increase may be necessary in order to keep the
voltage within a specified range at a remote point.
Low voltage and high voltage wires should be kept physically separated so that they cannot contact one
another. This reduces the risk of electric shock and improves system performance.
Table 2-3: I/Oand Signal Wiring Specifications
Connection Specification Value
Signal Wiring
Cable/Wire Rating
(1)
300 V
Minimum Current Capacity .25 A
Temperature Rating (Insulation)
(2)
80°C
Low Voltage Power
Cable/Wire Rating
(1)
300 V
Minimum Current Capacity
(3)
1 A
Temperature Rating (Insulation)
(2)
80°C
1. ≥ 30V if the wiring is not in close proximity to wiring operating at voltages above 60 V.
2. Insulation rating will need to be rated for the higher voltage if the wiring is in proximity to wiring operating at voltages above 60 V.
3. Larger gauge wire may be required to minimize voltage drop due to voltage (IR) loss in the cable.
Table 2-4: Recommended Wire Sizes
AWG mm
2
22 .34
24 .25
26 .14
28 .08
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