Clear-Com CELLCOM 10, Instruction Manual

Page: 43 / 168

Vitec Group Communications
CellCom-10 Instruction Manual 4 - 5
Table 4-1: Party Line Pinout
To connect party-line equipment to the base station
1. Check that the party-line LED on the front-panel is out, which
indicates that the party-line connection is disabled from the base
station.
2. Connect, and if appropriate, power up, the external party-line
equipment.
3. Enable the party line by pressing the “enable” button on the base
station’s front panel.
The base station detects power and termination settings when the
party line is enabled by pressing the “enable” button on the base
station’s front panel, or when the base station is powered up after
having enabled the party line. The base station remembers that the
party line is enabled when it powers up.
When the CellCom 10 base detects a wired party line being connected
with 30 VDC on Pin 2, it does not enable the 24-VDC power supply
that the CellCom 10 base station supplies to the connector to support a
handful of locally connected wired party-line beltpacks. The base
station then appears to the wired party-line system as a remote station.
The first call to a Party Line channel A or B results in the call alert and
subsequent ones do not give any further alerting unless the Party Line
channel buttons on the base are toggled. This prevents all calls giving
alerts when this is not necessary.
CONNECTING DIRECTLY TO CLEAR-COM
PARTY-LINE BELTPACKS
PL CH-A and PL CH-B have the ability to directly support up to four
Clear-Com RS-501 or RS-601 party-line beltpacks each, without any
other connection to a wired party-line system. This feature gives the
convenience of being able to add a few wired beltpacks when needed
to a CellCom 10 installation.
Connect a standard two-conductor shielded microphone cable to the
PL CH-A connector, and then connect it to a Clear-Com single-channel
party-line beltpack. Enable the party line and the base station will
enable the required 200-ohm termination, and will supply 24-VDC to
Pin 2 to power the beltpack(s).
It is possible to daisy-chain up to four beltpacks, or use an intercom
XLR splitter at the base to feed mic cables connected to the individual
beltpacks. Because it is a 24-volt rather than a 30-volt current, the
PIN DESCRIPTION
1 Ground (shield)
2 Power
3 Audio