3. Electrical Interface

3.1 Power Ground and Chassis Connection

The electrical input power ground and the servo chassis are connected as shown below. The power ground (PWR_GND) is DC-isolated from the chassis, while an AC-coupling network is implemented between them to reduce both conducted and radiated electromagnetic noise.

This configuration provides a low-impedance return path for high-frequency interference, improving EMC performance, while maintaining DC isolation to prevent ground-loop currents and preserve system safety.

Figure 5. Ground & Chassis Connection (Representative)

3.2 Connector and Pinout Map

The information for the Connector and ¹Pinout Map is as follows.

SMR12/15/20/25

Table 4. Connector Pinout Map (15/20/25)

SMR50/100/120C/150

SMR300/500

Refer to the following Link to select the appropriate AWG for the connection wire.