Rs-422 Cable - Mitsubishi Electric GOT2000 Series Connection Manual

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5.3.2

RS-422 cable

■1. Connection diagram
(1) RS-422 connection diagram 1)
*2
GOT side
RDA
2
RDB
7
SDA
1
SDB
6
SG
5
RSA
3
CSA
4
RSB
8
CSB
9
FG
-
*1
Terminating resistor of 240Ω 1/2W should be provided for a temperature controller which will be a terminal.
*2
For GT27 and GT25 (except for GT2505-V), set the terminating resistor to "Enable".
For GT2505-V and GT21, set the terminating resistor to "330 Ω".
(2) RS-422 connection diagram 2)
GOT side
*2
RDA
RDB
SDA
SDB
SG
RSA
*3
*3
CSA
RSB
*3
CSB
*3
*1
Terminating resistor of 240Ω 1/2W should be provided for a temperature controller which will be a terminal.
*2
Set the terminating resistor of GOT side, which will be a terminal, to "330Ω".
*3
The signals RSA, RSB, CSA, and CSB are not provided for
■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.
1.4.1 GOT connector specifications
(3) OMRON temperature controller side connector
Use the connector compatible with the OMRON temperature controller.
For details, refer to the user's manual of the OMRON temperature controller.
■3. Setting terminating resistors
(1) GOT side
Set the terminating resistor setting switch of the GOT main unit to "100 OHM".
For details of terminating resistor settings, refer to the following.
1.4.3 Terminating resistors of GOT
(2) OMRON temperature controller side
When connecting a OMRON temperature controller to the GOT, the terminating resistor must be connected to the
OMRON temperature controller.
User's Manual of the OMRON temperature controller
1.4.3 Terminating resistors of GOT
1.4.3 Terminating resistors of GOT
Temperature
controller side
SDB
21
SDA
22
RDB
11
RDA
12
SG
13
Terminating
resistor
*1
Temperature
controller side
SDB
21
SDA
22
RDB
11
RDA
12
SG
13
Terminating
resistor
*1
. Return connection is not required.
5.3 Connection Diagram
Temperature
controller side
SDB
21
SDA
22
RDB
11
12
RDA
SG
13
Temperature
controller side
SDB
21
SDA
22
RDB
11
RDA
12
13
SG
5 - 17
5

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