System Wiring; Serial Data Communications; Remote Standby Switch - Bose FREESPACE 4400 Owner's Manual

4.7 System wiring

Installer's Note: Disconnect the FreeSpace 4400 system
from the AC (mains) power before making any input/output
connections.

4.7.1 Serial data communications

Connect your PC to the FreeSpace 4400 system using a straight-
wired serial data cable (DB9 male to DB9 female).
RS232 port pinout
4.0 Hardware Installation

4.7.2 Remote standby switch

If you are installing a remote standby switch, connect it to the
REMOTE ON/OFF input.
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Remote Standby
Switch
Normally Open
Switch (latching)
4400
REMOTE ON/OFF