Omni 4000 Series Installation Manual page 50

PC or SCADA DEVICE
Direct Connect
or via
MODEM or RADIO
RX
2
DB9
TX
3
Female
Connector RET
5
RTS
7
Figure 3-23: Example Serial Module Wiring to a PC or SCADA Device
OMNI
COMPUTER,
MASTER
Serial
Module
RS485 2-Wire
Terminated
Figure 3-24: Example Peer to Peer Wiring of Serial Modules
MASTER
PLC DEVICE
A
RX
B
A
TX
B
RS-485
Terminated
Figure 3-25: Example of Peer to Peer Wiring to a PLC Device
3-28
OMNI 4000/7000 Installation Guide – Rev H
(Optional)
Jumper provides pulldown terminating resistor to -9v
*
OMNI
COMPUTER
Serial
Module
7 B 7
8 8
9 9
10 GND 10
11 A 11
12 12
RS485 2-Wire RS485 2-Wire
Non-Terminated Non-Terminated
OMNI OMNI
COMPUTER COMPUTER
Serial Serial
Module Module
7 TX-B 7
8 8
9 RX-B 9
10 GND 10
11 TX-A 11
12 RX-A 12
RS485 4-Wire RS485 4-Wire
Non-Terminated Non-Terminated
Installation
Serial
Module
*
OMNI OMNI
COMPUTER COMPUTER
Serial Serial
Module Module
7 7
8 8
9 9
10 10
11 11
12 12
RS485 2-Wire
Non-Terminated
OMNI OMNI
COMPUTER COMPUTER
Serial Serial
Module Module
7
8
9
10
11
12
RS485 4-Wire RS485 4-Wire
Non-Terminated Terminated
1(7)
2(8)
3(9)
4(10)
5(11)
6(12)
7
8
9
10
11
12