■2. Precautions when preparing a cable
(1) Cable length
The length of the RS-422 cable must be 500m or less.
(2) GOT side connector
For the GOT side connector, refer to the following.
(3) LS INDUSTRIAL SYSTEMS PLC side connector
Use the connector compatible with the LS INDUSTRIAL SYSTEMS PLC side module.
For details, refer to the user's manual of the LS INDUSTRIAL SYSTEMS PLC.
■3. Connecting terminating resistors
(1) GOT side
When connecting a PLC to the GOT, a terminating resistor must be connected to the GOT.
For GT27, GT25(Except GT2505-V), GT23
Set the terminating resistor setting switch of the GOT main unit to "Disable".
For GT2505-V, GT21
Set the terminating resistor selector to "330Ω".
Since the terminating resistor is fixed to 330 Ω, no setting is required for the terminating resistor.
For the procedure to set the terminating resistor, refer to the following.
(2) LS INDUSTRIAL SYSTEMS PLC side
When connecting an LS INDUSTRIAL SYSTEMS PLC to the GOT, a terminating resistor must be connected.
12 - 12
12.3 Connection Diagram
1.4.1 GOT connector specifications
1.4.3 Terminating resistors of GOT
12.3.2 ■1. Connection diagram