User Manual

14221-1200-4000, Rev. A
72
Table 11-1: Option Cable CA-012349-001 Interconnections
44-PIN I/O
CABLE
CONNECTOR
P1 PIN
SIGNAL NAME TO/FROM DESCRIPTION
3 SDATA P4 pin 8
In a front-
mount radio installation, this pin for the siren/PA
interface is the siren serial data output (open-
collector/open-
drain) from the radio’s mounted (local)
control head
. It serially transfers siren and light control
data from the control head to a connected third-
party
siren and light system (e.g., Federal Signal SS2000
SmartSiren). Data rate = 1200
bps. Connects to
SS2000’s DB-9 pin 3. For a remote-mount radio installa-
tion, see footnote
4
.
5 FDISC P4 pin 9
Buffered Filtered Discriminator Audio Output
(not
normally used). A fixed-level audio output with DC bias
.
Approximately 200 mV rms into a 600-
ohm load at rated
deviation. Does not
contain signaling (e.g., CTCSS).
Mutes when speaker mutes. Use a 33 µF / 50
V (or
greater) coupling capacitor to connect to a 600-
ohm load.
Use P4 pin 12 for ground.
13 ALO P4 pin 10
In a front-mount radio installation, this 600-ohm AC-
coupled differential audio output from the mounted (local)
control head is typically not used. In a remote-
mount
radio installation, these two pins of the radio’s DB-
44
connector are not functional.
12 MICHI P4 pin 11
1 EXTALO P4 pin 12
In a front-mount radio installation, VOLHI (a single-
ended
AC-coupled audio signal) and EXTALO
(signal ground)
provide public address (PA) mic audio from the mount
ed
(local) control head to a siren and light system,
such as
the Federal Signal SS2000 SmartSiren. Pin 13
connects
to SS2000’s DB-
9 pin 5. Pin 12 connects to SS2000’s
DB-9 pin 6. For a remote-mount radio installation,
these
two pins can provide an unmuted volume-level-
controlled
single-ended audio signal to external devices. P1 pin 1
(EXTALO) is over-
current protected on radio’s PK Board
by a 1-amp fuse.
14 VOLHI P4 pin 13
15 CTLON P4 pin 14
Control-On Digital Input.
Logically OR’d on radio’s PK
Board with a CAN receiver activity logic signal, so either
input can turn on the radio. Not normally used.
16 XTONEENC P4 pin 15
External Tone Encode Audio Input (default)
or Auxiliary
Mic Audio Input.
17 XTONEDEC P4 pin 16 External Tone Decode Audio Output.
6 EXTALO P4 pin 17
Reference/Ground for external audio. Over-current-
protected on radio’s PK Board by a 1-amp fuse.
4
In a remote-mount XG-100M radio installation, this pin on the radio’s DB-44 connector is typically not used. For the
CH-721 control head, use the respective pin on the CH-721 Option Cable’s female DB-25 pin connector; see Section 11.2
for additional information.