Mitsubishi Electric GT1685 Connection Manual page 661

RS-422/485 connection diagram 6)
*3
GOT side(Terminal block)
SDA1 1
SDB1 2
RDA1 3
RDB1 4
SDA2 5
SDB2 6
RDA2 7
RDB2 8
SG 9
FG 10
*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 7)
GOT side
*3*4
(Terminal block)
SDA
SDB
RDA
RDB
SG
*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 Set the 2-wire/4-wire terminating resistor setting switch of the RS-232/485 signal conversion adaptor as follows.
2-wire type/4-wire type: 2-wire type (1Pair)
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".
1.4.4 Setting the RS-232/485 signal conversion adaptor
*4 For the RS232 setting, check "Enable the 5V power supply".
1.1.2 I/F communication setting
*5 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)
Signal name
*4
Series name Signal name 1)
RS485+
T/R+
Series name Signal name
RS485-
T/R-
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
ENERGY MEASURING UNIT
ELECTRIC MULTI-MEASURING
INSTRUMENT (1st)
*1
1)
*1
2)
Ter
SLD
Signal name 2)
RS485-
T/R-
is connected.
Signal name
< - > Ter
< - > Ter
19.3 Connection Diagram
INSTRUMENT (1st)
Signal name
*1
1)
*1
2)
*2
Ter
SLD
*4
Signal name
*1
1)
*1
2)
*2
Ter
SLD
*4
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