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19. GOT MULTI-DROP CONNECTION
19.4 Connection Diagram
*1 Use the twisted pair cable for SDA/SDB.
*2 Set the terminating resistor selector to "110 ".
*3 Set the terminating resistor setting switch of the GOT main unit to "Disable".
1.4.3 Terminating resistors of GOT
*4 Connect a 110 terminating resistor to the GOT to be a terminal.
*5 Make sure to ground a cable shield line by applying Class D Grounding.
RS485 connection diagram 2)
(For 1 pair wiring)
CON side
*
3
(20 pin) CON side
*
3
(20 pin) CON side
*
3
(20 pin)
Serial multi drop
connection unit
6
8
10
12
2
1
3
4
5
7
9
11
13
14
15
16
17
18
19
20
SDA
*
1
SDB
*
1
RDA
RDB
SG
SDA1(TXD1+)
SDB1(TXD1-)
RDA1(RXD1+)
RDB1(RXD1-)
SG
NC
NC
NC
SDA2(TXD2+)
SDB2(TXD2-)
RDA2(RXD2+)
RDB2(RXD2-)
NC
RSA(RTS+)
NC
RSB(RTS-)
NC
CSA(CTS+)
NC
CSB(CTS-)
*
2
*
5
*
5
*
5
*
5
5
7
9
11
2
1
3
4
6
8
10
12
13
14
15
16
17
18
19
20
SDA2(TXD2+)
SDB2(TXD2-)
RDA2(RXD2+)
RDB2(RXD2-)
SG
NC
NC
NC
SDA1(TXD1+)
SDB1(TXD1-)
RDA1(RXD1+)
RDB1(RXD1-)
NC
RSA(RTS+)
NC
RSB(RTS-)
NC
CSA(CTS+)
NC
CSB(CTS-)
*
5
*
5
6
8
10
12
2
1
3
4
5
7
9
11
13
14
15
16
17
18
19
20
SDA1(TXD1+)
SDB1(TXD1-)
RDA1(RXD1+)
RDB1(RXD1-)
SG
NC
NC
NC
SDA2(TXD2+)
SDB2(TXD2-)
RDA2(RXD2+)
RDB2(RXD2-)
NC
RSA(RTS+)
NC
RSB(RTS-)
NC
CSA(CTS+)
NC
CSB(CTS-)
*
4
R