Encore TWC-703 Adapter
3
TWC-703 Adapter
TWC-703 combines two standard Clear-Com intercom channels, on two separate cables, onto
a single standard 3-pin microphone cable. This includes bi-directional Two-Wire/Clear-Com call
signal translation. It does this by combining two channels of Clear-Com intercom audio onto a
single dual channel on separate wires within a single cable. One wire in the same cable carries
30 volts DC operating power. Clear-Com refers to this combination as TW.
For non stand-alone systems, there is an optional Power Injection Mode in which the TWC-703
Adapter is powered using an external power supply (453G023). This enables you to have
flexible powering options for larger systems.
You can optionally use the TWC-703 Adapter as a stand-alone device that can power up to 12
RS-703 two-wire beltpacks or their equivalent. This stand-alone TWC-703 creates a small dual
channel TW intercom system. This configuration requires an external power supply (453G023).
Note:
The external power supply (453G023) is not supplied with the TWC-703 Adapter and must be
ordered separately.
If a TW-equipped intercom station is connected to a standard Clear-Com intercom line (without
a TWC adapter), only the Channel B portion of the station will operate normally. Channel A will
appear to be inactive. Channel B intercom audio and “call” signaling is simply passed through
the TWC-703 to the intercom station, and operates in the normal Clear-Com manner.
For more information about the TWC-703 operating modes, see:
l
l
Power Injection Mode on page 14
l
A typical system configuration, using both Clear-Com and TW Partyline wiring, is shown below.
Page 12
