User Manual

MM-014763-001, Rev. G
94
P5, the cable’s D-subminiature 9-pin connector, provides NMEA-formatted GPS serial data connections
for the external computer processing the NMEA-formatted GPS data received by the radio’s internal GPS
receiver. See Section 12 on page 103 for additional information.
Table 11-1: M5300/M7300 Option Cable CA-012349-001 Interconnections
44-PIN I/O
CABLE
CONNECTOR
P1 PIN
SIGNAL NAME TO/FROM DESCRIPTION
19 SPKR1
P2 pin 1
Speaker Audio Outputs 1 and 2. These two outputs are not
used in a remote-mount radio installation with a CH-
721
control head. However, in a front-
mount radio installation,
and in a remote-mount radio installation with an HHC-
731
hand-
held controller, these two outputs drive the radio
installation’s external speaker.
20 SPKR1
21 SPKR2
P2 pin 2
22 SPKR2
10 OUT2 P3 pin 1
Digital Output 2 (open-collector, 500 mA / 30 V maxi-
mum). Use P3 pin 2 or 4 for ground.
For ECP, configure via the “External Output Control Line
2” in Radio Personality Manager’s (RPM’s) External I/O
dialog box.
7 GND P3 pins 2 & 4
Chassis Ground (fused on radio’s
PK Board at
3.15 amps).
26 HKSW P3 pin 3
Digital Input for Hookswitch (default) or for radio
PTT.
Active = Ground. Inactive = Open.
For use as a PTT input with OpenSky
“rear panel software”
R15A and later, send the following AT command
to the
radio: AT@PTT_INPUT2. Also see P4 pin 21.
25 INP2 P3 pin 5
Digital Input 2. Active = Ground. Inactive =
Open. Use P3
pin 2 or 4 for ground.
For ECP, configure via the “Auxiliary Input 2” in Radio
Personality Manager’s (RPM’s) External I/O dialog Box.
28 SWA+ P3 pin 6
Switched A+ (DC Power) Output.
8 GND P4 pin 1
Chassis ground (fused on PK Board at 3-amps).
30 DGPS_DATA P4 pin 4
GPS Receiver Module DGPS Correction Data Serial Data
Input (NMEA-Formatted).
4 EXTRX P4 pin 5
External Rx Audio Input (from external/2
nd
receiver; summed).
9 EXTMOD P4 pin 7
External Tx Audio Input (not normally used).
3 SDATA P4 pin 8
In a front-
mount M5300/M7300 radio installation, this pin
for the siren/PA interface is the siren serial data output
(open-collector/open-drain) fr
om the radio’s mounted
(local) CH-
721. It serially transfers siren and light control
data from the CH-721 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
5
.
5
In a remote-mount M5300/M7300 mobile 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 11.3 for additional information. For the HHC-731 hand-held controller, use the respective pin on the HHC-731
Interface Cable’s female DB-25 connector; see Section 11.6 for additional information.