Wire connections – Micromod MOD: MODBUS RTU Communications Guide User Manual
Page 26
MODBUS RTU
COMMUNICATIONS GUIDE
22
WIRE CONNECTIONS
Table 13. Wire Connections for RS-232 Devices
PC Serial Port
MOD30ML
Mod
RS-232
MOD30ML
Modcell
25-Pin
9-Pin
Port 1
Port 2
cell
Port 1
Port 2
BI
9&10 7&8
MLP
Master
Slave
BI
9&10 7&8
MLP
2
3
3
9
13
Hi-1
Tx
⇒
Rx
2
8
12
Hi-2
3
2
2
8
12
Hi-2
Rx
⇐
Tx
3
9
13
Hi-1
7
5
1
10
14
Lo-2
Gnd
⇔
Gnd
1
10
14
Lo-2
Table 14. Wire Connections for RS-485 (4 or 5-Wire) Devices
B&B
Quatech OPTO-22
MOD30ML
Mod
RS-485
MOD30ML
Modcell
3PXOCC2A
DSP-225 AC 24 AT
Port 1
Port 2
cell
(4 or 5-Wire)
Port 1
Port 2
3PXCC2A DS-300
or AC 34
BI
9&10 7&8
MLP
Master
Slave
BI
9&10 7&8
MLP
2050R
2
2
4
3
9
13
Hi-1
Tx+
⇒
Rx+
5
11
15
Lo-1
35
3
7
5
2
8
12
Hi-2
Tx-
⇒
Rx-
4
10
14
Lo-2
34
9
4
8
5
11
15
Lo-1
Rx+
⇐
Tx+
3
9
13
Hi-1
33
1
8
9
4
10
14
Lo-2
Rx-
⇐
Tx-
2
8
12
Hi-2
32
5
3
3
1
Gnd
⇔
Gnd
1
29
B&B
Quatech OPTO-22
RS-485
Commander
3PXOCC2A
DSP-225 AC 24 AT
(4 or 5-Wire)
C100
3PXCC2A DS-300
or AC 34 Master
Slave MR250 C1900 C150 C200 C300 C310 C500 PR100
2
2
4
Tx+
⇒
Rx+
7
7
22
7
9
21
34
3
3
7
5
Tx-
⇒
Rx-
8
6
23
6
10
22
35
2
9
4
8
Rx+
⇐
Tx+
3
4
20
4
11
18
32
5
1
8
9
Rx-
⇐
Tx-
2
5
21
5
12
19
33
6
5
3
3
Gnd
⇔
Gnd
12
8
24
Gnd
8
20
36
8
Table 15. Wire Connections for RS-485 (2 or 3-Wire) Devices
B&B
Quatech OPTO-22
MOD30ML
Mod
RS-485
MOD30ML
Modcell
3PXOCC2A
DSP-225 AC 24 AT
Port 1
Port 2
cell
(2 or 3-Wire)
Port 1
Port 2
3PXCC2A DS-300
or AC 34
BI
9&10 7&8
MLP
Master
Slave
BI
9&10 7&8
MLP
2050R
2&9
2&4
4-8
3&5 9&11 13&15 Hi&Lo-1 RxTx+
⇔
RxTx+ 3&5
9
13
-1
33&35
3&1
7&8
5-9
2&4 8&10 12&14 Hi&Lo-2 RxTx-
⇔
RxTx- 2&4
8
12
-2
32&34
5
3
3
1
Gnd
⇔
Gnd
1
29
B&B
Quatech OPTO-22
RS-485
Commander
3PXOCC2A
DSP-225 AC 24 AT
(2 or 3-Wire)
C100
3PXCC2A DS-300
or AC 34 Master
Slave MR250 C1900 C150 C200 C300 C310 C500 PR100
2&9
2&4
4-8
RxTx+
⇔
RxTx+
3&7
4
22
4
34
3&1
7&8
5-9
RxTx-
⇔
RxTx-
2&8
5
23
5
35
5
3
3
Gnd
⇔
Gnd
12
8
24
7
36
* NOTES: 1.
MOD30ML and Modcell do not support MODBUS Master
communications with a 2-wire RS-485 module.
2.
On Modcell MLP and MOD30ML, 4-wire modules are recommended for
all applications, even for 2-wire installations.
WARNING
Incorrect wiring can damage communication hardware.
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