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handset handle, an "off hook" indicator LED, a page receive speaker with volume control, and 10
ft cable with 25-pin D-subminiature connector. To install the desktop unit follow the steps de-
scribed below:
1. Install the remote subset enclosure within 10 ft of the desktop handset unit as described in
Section A and make electrical connections as described in the Section E. The suggested
location for a remote subset with desktop unit is the knee-well of the desk.
2. Plug the 25-pin D-subminiature connector to the 25 pin receptacle of the remote subset and
fasten it with the two screws provided.
3. Test the station for proper operation.
E. Electrical Connections (see Fig. 1, 4, 5)
To avoid electrical shock, do not connect wires when power is applied.
The enclosure has a motherboard that provides designated screw terminal blocks for easy and
trouble free connections of system cable. It allows sufficient space for the system cable to be
looped in and out. The wires should be properly dressed and terminated inside the enclosure. The
SelectFone stations are electrically paralleled. This allows system expansion by simply extending
the system cable from the nearest SelectFone station.
Wire the station carefully by following the wire colors and using the spade lugs as shown in
Figure 4. Perform all electrical wiring per the National Electrical Code.
a. 120 VAC Power Connection
All AC power wiring to the SelectFone station is made at the 3-position terminal block JP1
mounted on the motherboard. Connect the black (HOT) 14 AWG conductor of the incoming
and outgoing cable to H terminal. Connect white (NEUTRAL) 14 AWG conductor to the
terminal marked N. Connect the green/yellow (earth ground) 14 AWG conductor to the ter-
minal marked GND.
A green 14 AWG ground conductor should be part of the system cable where no conduit or
non- metallic conduit is used. If a non-metallic enclosure is used with metallic conduit and
cable without ground conductor, there absolutely must be an electrical bond between conduit
and terminal marked GND at terminal block JP1 of the SelectFone station.
No SelectFone station should be installed or operated without having proper
b. 24VDC Power Connection for 24VDC SelectFone
The 24VDC SelectFone system stations are designed for operation from a 24VDC,
rechargeable battery. A charger can be connected to maintain the batteries. Ground the
negative side of battery only at one point for the system to reduce the hum and noise in the
24VDC SelectFone system.
Do not operate 24VDC SelectFone system stations from a charger without a 24V battery
connected to it because high, no load voltage (30V to 40V) of a 24V charger can damage
the equipment. Never connect 24VDC SelectFone station to a supply
WARNING
WARNING
ground continuity.
WARNING
voltage greater than 28VDC.
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