Connection Diagram - Mitsubishi Electric GT1685 Connection Manual

19.3 Connection Diagram

The following shows the connection diagrams and connector specifications of the RS-422/485 cable used for connecting
the GOT to a PLC.
RS-422/485 connection diagram 1)
CON side(20pin)
SDA1(TXD1+)
6
SDB1(TXD1-)
8
RDA1(RXD1+)
10
RDB1(RXD1-)
12
SG
2
NC
1
NC
3
NC
4
SDA2(TXD2+)
5
SDB2(TXD2-)
7
RDA2(RXD2+)
9
RDB2(RXD2-)
11
NC
13
RSA(RTS+)
14
NC
15
RSB(RTS-)
16
NC
17
CSA(CTS+)
18
NC
19
CSB(CTS-)
20
*1 The signal name differs depending on the series name. Refer to the following table.
Energy measuring unit
Electric multi-measuring instrument
*2 Short-circuit between the following terminals of the energy measuring unit or electric multi-measuring instrument which will be a
terminal.
By the short circuit of the following terminals, a terminating resistor with 120
Energy measuring unit
Electric multi-measuring instrument
*3 When placing the GOT to the terminal, set the terminating resistor of the GOT to "Enable".
When placing the GOT to the position other than the terminal, set the terminating resistor of the GOT to "Disable".
*4 Ground a shield correctly.
19 - 4
19. ENERGY MEASURING UNIT/ELECTRIC MULTI-MEASURING INSTRUMENT CONNECTION
19.3 Connection Diagram
*3
Series name
Series name
1.4.3 Terminating resistors of GOT
ENERGY MEASURING UNIT
ELECTRIC MULTI-MEASURING
INSTRUMENT (1st)
Signal name
*1
1)
*1
2)
Ter
SLD
*4
Signal name 1) Signal name 2)
RS485+ RS485-
T/R+ T/R-
Signal name Signal name
RS485- < - >
T/R- < - >
ENERGY MEASURING UNIT
ELECTRIC MULTI-MEASURING
INSTRUMENT (1st)
Signal name
SLD
*4
is connected.
Ter
Ter
*1
1)
*1
2)
*2
Ter