8
RS-232 TO FIBER OPTIC MULTIPLEXOR
3.2 AC Power Connection
The 120-VAC version of the multiplexor requires 95 to 130 VAC, 50 to 60 Hz
power, at a maximum current of 1 ampere. It is equipped with a U.S.-standard
three-prong power plug that should be connected to a properly grounded AC
outlet. Do not operate the mux with the chassis ungrounded.
Units of 240-VAC versions require 50 to 60 Hz power at a maximum current
of 0.5 amp. The power cord is provided with a plug that matches the standard
for the country for which the unit is sold.
3.3 Optical-Cable Connection
The multiplexor operates in full-duplex mode, requiring a two-fiber cable
or two fibers of a multifiber cable.
Multifiber cables usually have number labels on each connector with both
ends of the same fiber having the same number. This type of cable should
have the same-numbered fiber connected to the transmitter of the first mux
at one end of the cable and the receiver of the second mux at the other end
of the cable.
Before connecting optical cables to the mux’s optical transmitter and
receiver, verify that both the cable terminations and the optical transmitter
and receiver receptacles are clean. It is good practice to cover the connectors
with the provided plastic caps when the connectors are not in use.
To connect fiberoptic cables to your mux, insert each cable’s male
connector into the matching female connector of the optical transmitter or
receiver, as shown in Figure 3-2 on the next page. If the connectors are SMA
type, finger-tighten the coupling nut. If the connectors are ST type, gently
twist the male connector to lock it into place.
For SMA connectors, failure to tighten the coupling nut can cause
inadequate optical coupling between the cable and the mux, especially
at the transmitter.
CAUTION!
Do not use any tools to tighten the connectors under any circumstances.
Excessive tightening of a connector can result in damage to the
connector and possibly to the optical transmitter or receiver as well.
