Electrical Design Guide
‑33‑
Figure 2‑9 Diagram of shielded twisted pairs
2.4 Communication Cable Selection
Rules
EtherCAT cables are connected to the network ports (OUT and IN) equipped with
metal shield. The electrical characteristics comply with standards IEEE 802.3 and ISO
8877.
Communication cable specifications
Table 2–11 Specifications
Item
Description
UL Certification
Compliant with UL certification
Cat 5e cable Cat 5e cable
Double shielded
Braided shield (coverage: 85%), aluminum foil shield
(coverage: 100%)
Environmental worthiness
Ambient temperature: ‑30℃ to +60℃, resistant to industrial
oil, corrosive acid and alkali
Cable shield
The EtherCAT communication cable must be Ethernet Category 5 (100BASE‑TX)
network cable or high‑strength shielded network cable. The network cables used for
the servo drive must also be shielded, with cable length not exceeding 100 m. The
shielded network cable enhances the anti‑interference capacity of the system.
2.5 Cable Routing
2.5.1 Routing Precautions
● Do not connect the input power supply cables to the output terminals U, V, and W.
Failure to comply will damage the servo drive.
● When cables are bundled in a duct, the cooling effect will be deteriorated. In this
case, take the permissible current reduction ratio into account.