Mitsubishi Electric GOT2000 Series Connection Manual page 458

(4) RS-422 connection diagram 4)
■2. Precautions when preparing a cable
(1) Cable length
The length of the RS-422 cable must be within the maximum distance.
(2) GOT side connector
For the GOT side connector, refer to the following.
➠
■3. Connecting terminating resistors
(1) GOT side
When connecting a PLC to the GOT, a terminating resistor must be connected to the GOT.
(a) For GT27, GT25(Except GT2505-V), GT23
Set the terminating resistor setting switch of the GOT main unit to "Disable".
(b) For GT2505-V, GT21
Set the terminating resistor selector to "330Ω".
For the procedure to set the terminating resistor, refer to the following.
➠
(2) Serial communication module or computer link module side
Connect the terminating resistors (330Ω 1/4W (orange/orange/brown/ ) ) on the serial communication module or
computer link module side. For details, refer to the following manual.
➠
(a) Other than A2CCPUC24(-PRF)
Connect the terminating resistors supplied with the module across RDA and RDB.
(b) A2CCPUC24(-PRF)
Set TXD and RXD on the terminating resistor setting pin to "A".
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7.3 Connection Diagram
GOT side
(connector
terminal block)
SDA
SDB
RDA
RDB
SG
1.4.1 GOT connector specifications
1.4.3 Terminating resistors of GOT
User's Manual for the serial communication module or computer link module
Unfastened cable color of
GT21-C R4-25P5
Brown
Red
Orange
Yellow
Green