Omni 4000 Series Installation Manual page 49

Table 3-6: Back Panel Wiring of the Serial Module
Pinouts
RS-232
TX
1
TERM
2
RX
3
GND
4
RTS
5
RDY
6
TX
7
TERM
8
RX
9
GND
10
RTS
11
RDY
12
Figure 3-22 through Figure 3-25 are examples of Serial module wiring. Always use your project
specific drawings when wiring Serial modules to field devices.
RS-232 PRINTER
RX
3
DB25
RET
Male 7
Connector DTR
20
Figure 3-22: Example Serial Module Wiring to a Printer
3-27
OMNI 4000/7000 Installation Guide – Rev H
Signal Name
RS-485 2-Wire
B
–
–
GND
A
–
B
–
–
GND
A
–
Jumper provides pulldown terminating resistor to -9v
*
Jumper eliminates extra Form Feed before and after Reports.
**
Installation
Signal Type
RS-485 4-Wire
TX-B RS232 or RS485–Port 1
–
RS232 pull-down termination–
Port 1
RX-B RS232 or RS485–Port 1
GND Signal Ground–Port 1
TX-A RS232 or RS485–Port 1
RX-A RS232 or RS485–Port 1
TX-B RS232 or RS485–Port 2
–
RS232 pull-down termination–
Port 2
RX-B RS232 or RS485–Port 2
GND Signal Ground–Port 2
TX-A RS232 or RS485–Port 2
RX-A RS232 or RS485–Port 2
Serial
Module
* **
1(7) TX
2(8) TERM
3(9) RX
4(10) RET
5(11) RTS
6(12) RDY