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MODEL 2310 AL MCS-11 REMOTE ENCODER
FIAL INCORPORATED
FC2310_AL-20040506
7
INSTALLATION
Install this unit in 24 or 48 volt positive ground or negative ground stations. The factory default is
positive ground operation. Power is connected to a 2-terminal barrier strip at the rear of the unit.
Mounting ears are supplied for flush or projection mounting in a 19-inch rack.
There is an external chassis ground wire (jumper) that must be connected to the station ground
terminal at the power input connector. For positive ground systems (factory default), the jumper
should connect between the chassis (labeled Sta. Gnd) and the positive power input terminal. For
negative ground systems, the jumper should connect between the chassis (labeled Sta. Gnd.) and
the negative power input terminal. This jumper is required for proper operation - it insures that the
unit's electrical (chassis) ground is connected to the station ground.
CAUTION
: If connected incorrectly, there will be a short across the station battery!
STATION GROUND JUMPER (STA. GND) CAUTION
Some telecom sites require the station battery to be grounded at only one place near the battery
bank. If your installation requires an isolated station battery input, you must remove the provided
STATION GROUND jumper from the POSITIVE terminal of the power input terminal block on the
rear of the unit and provide an alternate connection from this STA. GND terminal to station ground.
The best way of providing a proper ground to the unit is to lengthen the jumper connected to STA
GND and securely connect it to the rack ground. Use a longer wire and a crimp/splice connector if
necessary. Leave the jumper connected to the STA. GND terminal (terminal block mounting screw
- right side). Do not loosen or remove the mounting screw securing the STA. GND jumper to the
terminal block, since it is secured with a washer and nut inside the unit.
Do not attempt to operate the equipment without a station ground (STA. GND) connection as
electrical damage may occur. The unit’s rack mounting screws alone will not provide a reliable
rack ground.
Figure 3. POSITIVE GROUND SYSTEM
Figure 4. NEGATIVE GROUND SYSTEM