MultiDyne FMX-125 - Manual (Page 4)

Instruction Manual, FMX-125 INTRODUCTION 4
INTRODUCTION
The Multidyne FMX-125 Series of Fiber Optic Multiplexers support transport of twelve bi-
directional RS-232 or RS-422/485 data channels, with the option of up to two audio or intercom
channels. It also supports 8 dry contact closures.
!!!!!! DANGER !!!!!!
INVISIBLE LASER RADIATION
AVOID DIRECT EXPOSURE TO BEAM
OUTPUT POWER MAX: 2 mW. WAVELENGTH: 1300/1550 NM. CLASS III b LASER
The optical laser transmitter may harm the human eye. Proper eye
protection should be used at all times when working with laser. Please read the entire
manual before operating the Fiber Optic devices.
WARNING
VOLTAGES INSIDE
The unit should be only serviced or opened by qualified personnel.
There are no user serviceable parts or adjustments inside.
OPERATION and CONNECTIONS
BASIC FUNCTIONALITY
FMX-125 OPERATION
The FMX-125 has 12 bi-directional RS-232 or RS-422/485 channels and 8 dry contact-
closure channels. The data I/O’s are connected through the 68 pin high density SCSI connector
to a screw terminal adapter/breakout board. A SCSI cable is used to connect the data portion of
the breakout board to the FMX-125. The contact closure relays and screw terminals for same are
on the breakout board. The contact closure portion of the breakout board connects to the FMX-
125 via a DB9 cable. Do not use a standard RS232 cable for this, as the pins may not be
connected one-for-one. Use only a cable that has all 9 pins connected individually one for one.
SCSI and DB9 cables are available from Multidyne. You’ll need 2 FMX-125s and 2 breakout
boards, plus cables, to form a complete link.
FMX-125 AUDIO OPTION
If the FMX-125 is equipped with the audio/intercom option, the audio inputs and outputs
are found on RIA connectors on the breakout board. By connecting a headset/microphone to
them, it becomes an intercom link with side tone.