Appendix A. Jumper Settings - Omni 4000 Series Installation Manual

Appendix A. Jumper Settings

A.1 Serial Module
Configure for RS-485 Mode
To access the serial module and configure the jumper blocks when an RS-485 setting is required,
follow these instructions:
1. Verify that the power to the flow computer
is OFF.
2. If you are using the panel mount chassis,
lift the Front Panel Bezel upwards to slide
the inner chassis out.
If you are using the NEMA chassis,
remove the card-retaining bracket from
the chassis.
Use the card ejector to remove the serial
3.
module from the chassis.
Make note of the serial module's
designated slot number on the
motherboard.
Locate the following port(s) and jumpers:
4.
a. Port 1: JB4, JB5 and JB6
b. Port 2: JB1, JB2 and JB3
5. Apply one of the following RS-485 jumper
settings (a, b, c, or d) according to project
requirements.
For each configuration, the jumper needs
to be in the on (closed) position.
a. Terminated RS-485 2-wire
Terminate the RS-485 devices at
the ends of an RS-485 bus network.
b. Unterminated RS-485 2-wire
Page A-1
OMNI 4000/7000 Installation Guide – Rev H
Jumper Settings
On (closed ) Off (open)