See Chapter 2 for AC supply power requirements, fuse and isolation transformer ratings.

All power, input, and output must be in accordance with Class I, Division 2 wiring methods as defined in Article 501-4(b) of the National Electrical Code, NFPA 70 for installations within the United States, or as specified in Section 18-152 of the Canadian Electrical Code for installation within Canada.

Attach wiring connections for the main circuit according to Tables 3-2 through 3-4 while observing the following cautions:

Use vinyl-sheathed or equivalent wire rated at 250 VAC or greater for 230 VAC S2K models or 600VAC or greater for 460 VAC S2K models. Wire size should be determined considering ampacity and codes.

Never connect AC main power to output terminals.

Never allow wire leads to contact the enclosure.

Never operate the S2K controllers without an earth ground.

When using this equipment in a Hazardous (classified) location:

Explosion hazard–substitution of components may impair suitability for Class I, Division 2;

Explosion hazard–when in hazardous locations, turn off power before replacing or wiring modules;

Explosion hazard–do not disconnect equipment unless power has been switched off or the area is known to be non-hazardous.

AC Supply and Motor Wiring and Grounding

The S2K motion controllers are to be permanently connected in a closed electrical operating area. The mains input and motor output connections are made to the screw terminal connector located on the bottom of the S2K controller. The controllers are designed to operate with input voltages as shown in Chapter 2. No isolation transformer is required if the supply voltage is within the specified range. For the S2K servo controllers, the maximum achievable motor speed is directly related to the input voltage. For best performance connect these models to a three-phase 230 or 460 VAC power source depending on the controller’s rated voltage.

All of the terminals marked with the symbol are connected to the chassis ground. Connect the terminal at the mains input end of the connector to the panel earth ground. Connect the terminal near the motor output terminals to the motor frame ground wire in the motor power cable. DO NOT OPERATE THE S2K CONTROLLERS WITHOUT AN EARTH GROUND.

Design Notice. Where residual-current-operated protective device (RCD) is used for protection in case of direct or indirect contact, only RCD’s of Type B is allowed on the supply side of this Electronic Equipment (EE). Otherwise another protective measure shall be applied such as separation of the EE from the environment by double or reinforced insulation or isolation of EE and supply system by a transformer. To meet the requirements of EN55011 and CE mark, EMI power line filters shall be employed between the motion controller and the supply mains. Table 3-1 lists suggested mains filters.

S-Series Servo Motor Encoder Wiring

Position feedback cables as shown in Table 3-13 are available from GE Fanuc for the S2K Series controllers. Plug the motor end of the encoder cable into the connector on the motor and the DB-type connector end of the cable into the DB-15 socket labeled Position Feedback on the front of the controller. The best system reliability is achieved when the encoder cable is returned in a separate conduit from that housing the motor power cable. The feedback cable should use 24-28 AWG twisted pair wire and must be shielded. The shields must be terminated to the isolated ground pins on the Position Feedback (DB-15) connector on the S2K controller as shown in Table 3-8. Maximum serial encoder cable length is 15 meters using factory-supplied cables. If two parallel 24 AWG wires are connected to both the +5v and ground (GND), as shown in Table 3-8, longer cable runs require the wire gauge to be increased to reduce the signal voltage drop. The S-Series motors require a 5V ±5% (4.75 to 5.25 VDC) power source for proper operation. See Section 3.6.10, Connection Diagrams, for additional wiring detail.

S-Series Servo Motor Power and Brake Wiring and Grounding

Motor power and brake cables as shown in Table 3-13 are available from GE Fanuc for the S2K Series Servo Controllers. Cables for S-Series motors with brakes include two 18 AWG leads for connection of a 24Vdc brake power supply (see section 2.1.9, Servo Motor Specifications, for brake power requirements) and brake control logic. The brakes are of a fail-safe design, engaged by internal springs and disengaged by the application of 24 Vdc power.

The motor cable must have a motor ground wire that connects one of the frame ground terminals on the controller to the frame ground pin on the motor connector. Tables to 3-13 show the proper wire size and Figure 3-25 shows the motor connector pin-out for each S-Series motor model. For noise sensitive applications, a shielded motor power cable may be necessary.

Note

A shielded motor power cable is required in CE marked systems. When used, the power cable shield should connect to the frame ground stud on the bottom of the controller and to the connector at the motor end. GE Fanuc’s standard motor power cables do not include a shield.

On the 30–750 Watt S-Series motors, the power connectors shown in the following figure are wired to the motors with short leads and include a separate connector (and require a separate brake cable) when the optional holding brake is included. On the 1.0–5.0 kW motors, the MS-style connectors shown are mounted directly on the motor’s frame and the brake connections are included in the same connector and cable.

MTR-Series Servo Motor Power and Brake Wiring and Grounding

Motor power and brake cables as shown in Table 3-13 are available from GE Fanuc for the S2K Series Servo Controllers. MTR-3T series motors with brakes include two additional leads for connection of a 24Vdc brake power supply (see section 2.1.9, Servo Motor Specifications, for brake power requirements) and brake control logic into the motor power cable. MTR-3N and MTR-3S series motors with brakes use a physically separate brake power cable and connector. The brakes are of a fail-safe design, engaged by internal springs and disengaged by the application of 24 Vdc power.

The motor cable must have a motor ground wire that connects one of the frame ground terminals on the controller to the frame ground pin on the motor connector. Tables to 3-13 show the proper wire size and Figures 3-26 through 3-28 show the motor connector pin-out for each motor model. For noise sensitive applications a shielded motor power cable may be necessary.

Note

A shielded motor power cable is required in CE marked systems. When used, the power cable shield should connect to the frame ground stud on the bottom of the controller and to the connector at the motor end. GE Fanuc’s standard motor power cables do not include a shield.
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