Section 3: Installation

Reference, Installation, and Operations Manual

June 2013

3-9000-743 Rev S

 

 

Serial Communication Port Drivers

For serial communication Ports A and B, the driver to be used is individually selectable between RS-232, RS-485 Half Duplex, and RS485 Full Duplex.

Serial ports (Port A and Port B) have isolated and floating grounds (50 VDC isolation). Their grounds must be connected for reliable serial port operation. A shield may be connected to ground at the remote end and can be used to provide ground for each port. If both ports are connected to the same remote location, the shield may be used to provide a common ground back to the remote end.

Port A Driver Configuration

The serial communication Port A driver is configured via CPU Board switch banks S3, S5, and S6 and Field Connection Board switch bank S1.

To configure Port A for RS-232 operation, set the switches as indicated in the table below (see Figure 3-24for switch bank locations).

Table 3-25 Port A driver settings

Board

Switch

Position

 

 

 

CPU

S3-1

RS232

 

 

 

 

S3-2

RS232

 

 

 

 

S3-3

RS232

 

 

 

 

S3-4

RS232

 

 

 

 

S5-1

FULL

 

 

 

 

S6-1

RS232

 

 

 

 

S6-2

RS232

 

 

 

Field Connection

S1-1

TERM OFF

 

 

 

 

S1-2

TERM OFF

 

 

 

 

S1-3

FULL DUPLX

 

 

 

 

S1-4

FULL DUPLX

 

 

 

74

Communication settings