Mitsubishi Electric GT15, Руководство по подключению

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19. ENERGY MEASURING UNIT/ELECTRIC MULTI-MEASURING INSTRUMENT CONNECTION
19.3 Connection Diagram
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)
*1 The signal name differs depending on the series name. Refer to the following table.
*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 is connected.
*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.
Series name Signal name 1) Signal name 2)
Energy measuring unit RS485+ RS485-
Electric multi-measuring instrument T/R+ T/R-
Series name Signal name Signal name
Energy measuring unit RS485- < - > Ter
Electric multi-measuring instrument T/R- < - > Ter
CON side(20pin)
*3
SG
NC
NC
NC
SDA2(TXD2+)
SDB2(TXD2-)
RDA2(RXD2+)
RDB2(RXD2-)
NC
RSA(RTS+)
NC
RSB(RTS-)
NC
CSA(CTS+)
NC
CSB(CTS-)
SDA1(TXD1+)
SDB1(TXD1-)
RDA1(RXD1+)
RDB1(RXD1-)
6
8
10
12
2
1
3
4
5
7
9
11
13
14
15
16
17
18
19
20
ENERGY MEASURING UNIT
ELECTRIC MULTI-MEASURING
INSTRUMENT (1st)
ENERGY MEASURING UNIT
ELECTRIC MULTI-MEASURING
INSTRUMENT (1st)
Signal name
1)
*1
2)
*1
Ter
SLD
*2
Signal name
1)
*1
2)
*1
Ter
SLD
*4
*4