YASKAWA SERVOPACK Sigma 7W Series Product Manual

Contents

4.1 Wiring and Connecting SERVOPACKs4-34 Wiring and Connecting SERVOPACKs In places with poor power supply conditions, ensure that the input power is supplied within thespecified voltage range.There is a risk of equipment damage. Provide sufficient shielding when using the SERVOPACK in the following locations.• Locations that are subject to noise, such as from static electricity• Locations that are subject to strong electromagnetic or magnetic fields• Locations that are subject to radiation• Locations that are near power linesThere is a risk of equipment damage. Configure the circuits to turn ON the control power supply to the SERVOPACK before the 24-VI/O power supply.If the control power supply to the SERVOPACK is turned ON after the external power supply, e.g.,the 24-V I/O power supply, the outputs from the SERVOPACK may momentarily turn ON when thepower supply to the SERVOPACK turns ON. This can result in unexpected operation that maycause injury or device damage. Provide emergency stop circuits, interlock circuits, limit circuits, and any other required safetymeasures in control circuits outside of the SERVOPACK.There is a risk of injury or device damage. If you use MECHATROLINK I/O Modules, use the establishment of MECHATROLINK communi-cations as an interlock output condition.There is a risk of device damage. Select the I/O signal wires for external wiring to connect the SERVOPACK to external devicesbased on the following criteria:• Mechanical strength• Noise interference• Wiring distance• Signal voltage Separate the I/O signal cables for control circuits from the power cables both inside and outsidethe control panel to reduce the influence of noise from the power cables.If the I/O signal lines and power lines are not separated properly, malfunction may occur.CAUTIONSteel separatorI/O signalcables incontrol circuitsPowercablesExample of Separated CablesNOTICE Whenever possible, use the Cables specified by Yaskawa.If you use any other cables, confirm the rated current and application environment of your modeland use the wiring materials specified by Yaskawa or equivalent materials. Securely tighten cable connector screws and lock mechanisms.Insufficient tightening may result in cable connectors falling off during operation. Do not bundle power lines (e.g., the Main Circuit Cable) and low-current lines (e.g., the I/O Sig-nal Cables or Encoder Cables) together or run them through the same duct. If you do not placepower lines and low-current lines in separate ducts, separate them by at least 30 cm.If the cables are too close to each other, malfunctions may occur due to noise affecting the low-cur-rent lines. Install a battery at either the host controller or on the Encoder Cable.If you install batteries both at the host controller and on the Encoder Cable at the same time, youwill create a loop circuit between the batteries, resulting in a risk of damage or burning. When connecting a battery, connect the polarity correctly.There is a risk of battery rupture or encoder failure.