Audio Distribution System
AD-4
14
9. Link
This is for future use. DO NOT USE.
10. Mute
This 3.5mm stereo mini-jack is for the connection of a PDM-1 Phone/
Doorbell Mute Module that can automatically mute the AD-4 audio.
11. Status
This 3.5mm mono connection provides a +12VDC output when any
zone is turned on (15mA max). This can be used to trigger external
equipment. When all zones are turned off, 0VDC is present.
12. +12VDC
This is for future use. DO NOT USE.
13. Speaker Outputs
Four sets of removable stereo connectors for speakers in each zone.
14. RS-232
DB-9 jack for RS-232 control of the AD-4 from a control system. See
Chapter 3 Installation & Operation for RS-232 control details.
DB-9 Pinout
1 DCD Carrier Detect
2 TXD Transmit Data
3 RXD Receive Data
4 DTR Data Terminal Ready
5 GND Ground
6 DSR Data Set Ready
7 RTS Request to Send
8 CTS Clear to Send
9 N/C Not Connected
15. AC Power Socket and Fuse
Three-pin grounded socket to connect removable AC power cord with a
T2AL 250V fuse.
CHAPTER 2 | FEATURES AND DESCRIPTION
AD-4 REAR PANEL - CONTINUED
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