2 Nomenclature and Installation
2 - 14
CJ-series EtherCAT Slave Units Operation Manual (W541)
Precautions for Correct Use
• The cable between any two nodes (L1, L2 ... Ln) must be 100 m or less.
• Firmly connect the communications cable connector until it clicks into place.
• When you install the communications cables, observe the cable specifications (e.g., bending
radius) of the cable manufacturer.
• Do not disconnect the communications cables from the EtherCAT Slave Units during opera-
tion. The outputs from the EtherCAT master may become unstable.
Make sure the cable between each pair of devices connects an output port to an input port.
Normal communications are not possible if an output port is connected to another output port or
an input port is connected to another input port.
Input port
Output port
EtherCAT master
EtherCAT
slaves
Communications
cable
Do not connect anything.
Last EtherCAT slave
L1
L2
Ln
EtherCAT Slave Unit