Serial Module - Omni 4000 Series Installation Manual

Pinouts Signal Name
Net #1 TX-
1
Net #1 TX+
2
RS485 Port 1–B
3
RS485 Port 1–A
4
Net #1 RX-
5
Net #1 RX+
6
Net #2 TX-
7
Net #2 TX+
8
RS485 Port 2–B
9
RS485 Port 2–A
10
Net #2 RX-
11
Net #2 RX+
12

3.7.4 Serial Module

The Serial module provides two ports. By factory default, both ports are configured for RS-232
mode. Project-specific requirements may call for using the RS-485 2-wire or RS-485
4-wire mode.
The maximum number of devices connected in parallel for each port are:
•
•
Jumper blocks allow for independent selection of each port to operate in RS-232 or RS-485
mode. Figure 3-21 illustrates the factory-configured jumper settings for RS-232 wire at Port 1
and Port 2.
3-25
OMNI 4000/7000 Installation Guide – Rev H
Table 3-5: Back Panel Wiring of the DE Module
Signal Type
Ethernet TX-
Ethernet TX+
RS485 B
RS485 A
Ethernet RX-
Ethernet RX+
Ethernet TX-
Ethernet TX+
RS485 B
RS485 A
Ethernet RX-
Ethernet RX+
12 compatible serial devices, including flow computers when using the OMNI
4000/7000 RS-232 serial ports.
32 devices when using the RS-485 mode.
Installation
Ethernet Pigtail Wire Color
Orange/White
White/Orange
Green/White
White/Green
Orange/White
White/Orange
Green/White
White/Green