Reference Guide

25
May ’01 Chapter 3. Installation
Figure 14: Jumper Settings for RS485 Line Termination
3.6 Setting Bus Addresses
If you are going to use the reader connected to a bus you will have to give each read-
er an individual address. You can do that either by setting switch S2 on the reader or
by software from the controlling computer.
3.6.1 Using S2 to Set the Address
You can use switch S2 to set the reader address between “0" and “7".
To set the bus address using S2, the Reader must be set to software address “0"
(factory setting).
3.6.2 Setting the Reader’s Bus Address through Software
Addresses “0” to 253” can be set by the host computer software, using the S6 Reader
Utility program.
Address S2-1 S2-2 S2-3
0 OFF OFF OFF
1OFFOFF
ON
2OFF
ON
OFF
3OFF
ON ON
4
ON
OFF OFF
5
ON
OFF
ON
6
ON ON
OFF
7
ON ON ON
Note:
When you are using the reader modules in a multi-drop configuration
you must power the readers up one-by-one, giving each reader its
unique address before progressing to the next reader.
J405
J403
J407
RS485 - B+
RS485 - A-