Clear-Com RCS-2700 - Manual (Page 25)

R C S - 2 7 0 0 S O U R C E A S S I G N M E N T P A N E L 2 - 5
POWERING FROM TW PARTY-LINE SOURCES
You can operate the RCS-2700 using TW party-line sources provided that each
source channel is powered. If power does not exist on every intercom channel,
you can add it using TWC-701 or TWC-704 TW Adapters. The wiring is as
shown in Figure 2-5. Because 2-amp relays are used, they can easily handle the
DC current on the line as they switch.
Figure 2-5: TW Source Wiring for a 4-Source System
When powering the stations this way, you should not connect the destination
power block to the source power block. Instead, connect a jumper wire on each
destination output using the connection options shown in Figure 2-5.
You can take RCS-2700 power from one of the source channels using the power
patch panel. The current drain of the RCS-2700 is designed not to interfere with
the audio on the powered source. You connect a jumper from the desired source
Source 4
Source 3
Source 2
Source 1
Main Unit
MS-704
4-Channel
Main Station
TWC-701 TWC-701 TWC-701 TWC-701
D C B A
A A A A TW TW TW TW
1 2
Shield
3 (NC)
Turn MS-704
Channel
Terminations ON
Turn RCS-2700
Channel Terminations
1-4 OFF
1 2 3
Shield
TW Destination
Channels
1 & 2 3 & 4 5 & 6 7 & 8 9 & 10 11 & 12