Mitsubishi Electric GT1685 Connection Manual page 659

RS-422/485 connection diagram 2)
*3
CON side(14pin)
SDA1(TXD1+)
1
SDB1(TXD1-)
2
RDA1(RXD1+)
3
RDB1(RXD1-)
4
SG
13
SDA2(TXD2+)
5
SDB2(TXD2-)
6
RDA2(RXD2+)
7
RDB2(RXD2-)
8
RSA(RTS+)
9
RSB(RTS-)
10
CSA(CTS+)
11
CSB(CTS-)
12
NC
14
Shell
*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".
1.4.3 Terminating resistors of GOT
*4 Ground a shield correctly.
RS-422/485 connection diagram 3)
*3
GOT side(D-sub 9pin)
SDA
1
SDB
6
RDA
2
RDB
7
SG
5
RSA
3
RSB
8
CSA
4
CSB
9
*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 "110 ".
When placing the GOT to the position other than the terminal, set the terminating resistor of the GOT to "OPEN".
1.4.3 Terminating resistors of GOT
*4 Ground a shield correctly.
19. ENERGY MEASURING UNIT/ELECTRIC MULTI-MEASURING INSTRUMENT CONNECTION
ENERGY MEASURING UNIT
ELECTRIC MULTI-MEASURING
INSTRUMENT (1st)
*4
Series name Signal name 1)
RS485+
T/R+
Series name Signal name
RS485-
T/R-
ENERGY MEASURING UNIT
ELECTRIC MULTI-MEASURING
INSTRUMENT (1st)
*4
Series name Signal name 1)
RS485+
T/R+
Series name Signal name
RS485-
T/R-
ELECTRIC MULTI-MEASURING
Signal name
*1
1)
*1
2)
Ter
SLD
Signal name 2)
RS485-
T/R-
is connected.
Signal name
< - > Ter
< - > Ter
ENERGY MEASURING UNIT
ELECTRIC MULTI-MEASURING
Signal name
*1
1)
*1
2)
Ter
SLD
Signal name 2)
RS485-
T/R-
is connected.
Signal name
< - > Ter
< - > Ter
19.3 Connection Diagram
ENERGY MEASURING UNIT
INSTRUMENT (1st)
Signal name
*1
1)
*1
2)
*2
Ter
SLD
*4
INSTRUMENT (1st)
Signal name
*1
1)
*1
2)
*2
Ter
SLD
*4
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