User guide

TW-60 PUBLIC SAFETY RADIO INTERFACE
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INSTALLING A TW-60
There are eight basic steps to installing the TW-60 Public Safety Radio Interface:
1. Wire cables for connecting the TW-60 unit to radios.
2. Install the TW-60 unit in an equipment rack.
3. Connect the the TW-60 unit to power,
4. Connect the TW-60 unit to radios.
5. Connect the TW-60 unit to a Clear-Com matrix,
6. Connect the TW-60 unit to general-purpose outputs (GPIs).
7. Adjust tranmsit levels.
8. Verify operation of the system.
CONNECTION TO RADIOS
In order to accommodate the widest variety of 2-way radios, each interface
channel of the TW 60 has a 9-pin DB-9F connector which can be wired to a
wide variety of two-way radio audio and control connections. Wiring diagrams
for many two-way radios are supplied as examples of cable wiring. (See
addendum sheet) This will allow you to make a cable that will operate with your
particular radio(s). Each connector socket is labeled on the TW-60's back panel
as Two-Way Radio.
Table 2: Two-Way Radio DB-9F Connections
The combination of setup switches, connector wiring and front panel "Transmit"
and "Receive" level controls assures correct level matching to virtually any radio.
A relay provides the required "Push-to-Talk" transmitter "keying" of the radio.
This relay is activated when the Clear-Com matrix communications system
PIN FUNCTION
1 Earphone receive audio ground (shield)
2 Normally closed (NC) transmit key contact
3 Common (C) transmit key contact
4 Normally open (NO) transmit key contact
5 Microphone transmit audio ground (shield)
6 Earphone receive audio
7 Common (C) transmit key contact
8 Alternate transmit key / audio connection
9 Microphone transmit audio
You can wire the TW-60 to
a wide variety of two-way
radio audio and control
connections.
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