Wiring Considerations - Mitsubishi Electric MELSEC iQ-R Series User Manual

Wiring considerations

• To establish a reliable system and fully use the functions of the BACnet module, a wiring that does not easily receive the
effects of noise is required.
• Sufficient safety measures must be taken when constructing the IEEE802.3 100BASE-TX/10BASE-T networks.
Consult a specialist when handling the terminal processing of connection cable, installing trunk cables, etc.
• Use the cables compliant with IEEE802.3 100BASE-TX/10BASE-T standards.
• For the connection on the target device side, check the specifications of the target device in advance.
• Place an Ethernet cable in a duct or clamp it.
Otherwise, the dangling cable may swing or inadvertently be pulled. It may cause a BACnet module or an Ethernet cable to
damage or malfunction due to the poor contact.
• Protect the core wire in the connector of a cable or the port of the BACnet module to prevent touching by hand and sticking
dirt or dust.
If any oil from your hand, dirt or dust sticks the core wire, it may increase the transmission loss and fail a data link.
• Check if the Ethernet cable used is disconnected, a short-circuit is generated, and the connector is properly connected.
• Do not use an Ethernet cable with broken clips.
Doing so may cause the cable to unplug or malfunction.
• Hold the connector on the Ethernet cable when connecting or disconnecting it.
If the cable is pulled while being connected to the module, it may cause the module or Ethernet cable to damage or
malfunction due to the poor contact.
• Attach the provided connector cover to protect the unused Ethernet port from dirt and dust.
• The maximum segment length of Ethernet cable is 100 m. However, the length may be shorter depending on the use
environment of the cable. For details, contact the manufacturer of the cable used.
• The bend radius of the Ethernet cable is limited. For details, check the specifications of the Ethernet cable used.
6 WIRING
36
6.1 Ethernet Cables