
S90-510 CS (MAR 07) FRICK
®
QUANTUM™ LX AcuAir
®
CONTROL PANEL
Page 84
COMMUNICATIONS SETUP
APPENDIX A
FRICK
®
SERIAL COMMUNICATIONS CONVERTER MODULE
(Part Number 639B0086H01)
Description
Frick
®
Controls has developed a DIN-rail mountable
communications module for the purpose of converting
typical RS-232 serial protocol to either RS-422 or RS-485
serial protocols. The module will also work converting RS-
422 or RS-485 to RS-232 (bi-directional). Due to the tight
mounting restrictions in many existing control panels, this
module provides the ultimate solution for field
communications upgrades or modifications. No drilling is
required, and no valuable space is lost. The only
requirement is an external source of 24 volt DC power.
Frick
®
Communications Converter Module
Setting the jumpers
Inside the module is a circuit board which contains a DIP
switch. This switch must be set according to the necessary
protocol parameters that you are trying to achieve. It is
recommended to set or verify the settings of this DIP
switch before mounting and wiring the module. The circuit
board must be removed from its housing in order to
access this DIP switch. Each end of the housing has a
small tab, located just below the bottom most terminal
block of each end. Hold the module as shown in the
following pictorial.
Disassembling the module
Press the tabs using the thumb and finger, and with your
other hand carefully slide the circuit board out of the
housing. Ensure that proper anti-static guidelines are
followed while handling the circuit board.
The following diagram shows the circuit board.
Module circuit board
For easy reference, the DIP switch position functions are
provided on the board. For the purpose of clarity however,
refer to Table 14.
TABLE 14 – MODULE DIP SWITCH SETTINGS
Switch
Position
ON Function
OFF Function
1 RS-485
RS-422
2 RS-422
RS-485
3 RS-422
RS-485
4
RS-422 Pull up
No pull up
5
RS-485 Pull up
No pull up
6
RS-422 Pull down
No pull down
7
RS-485 Pull down
No pull down
8
RS-485 line termination
No line termination
Mounting the module
This module can be mounted on the standard din rail that
is available in most control panels.
1.
Find an open area of the din rail (5/8 inch
minimum, for the width of the module), and
preferably as far away from any inductive loads
(relays, contactors, etc.) as possible.
2.
Module orientation is not critical, however, try to
mount it so that all wiring connections can be
made neatly, and according to any applicable
local codes.
Locking
Tabs