5902 Bell 202 Modem Hardware Manual
October 19, 2007
17
+
10.8 Volts
–
Maxon D Connector
1.
data in
2.
data out
3.
PTT
4.
GND
5.
Vcc
6.
CDS
7.
no connection
8.
no connection
9.
no connection
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
5902 Termination Block
Tx/Rx
+
+
+
+
–
–
–
–
Rx
KEY
RCD
Figure 10: Typical Connection to Maxon Radio
+
–
Johnson Connector Pins
1. no connection
2. no connection
3. no connection
4. no connection
5. B+
6. Keyline (active low)
7. Carrier Detect (active high)
8. Data In
9. Ground
10. Data out
Power
Supply
Johnson models 3410/3490
10 pin connector
1
2
3
4
5
6
7
8
10
9
8
7
6
5
5902 Termination Block
Tx/Rx
+
+
+
+
–
–
–
–
Rx
KEY
RCD
Figure 11: Typical Connection to Johnson Radio
+
----
Motorola Connector Pins
1.
Not Used
2.
Not Used
3.
Not Used
4.
Mic Audio Input
5.
Channel Select
6.
B+
7.
Data Input
8.
Data Output
9.
Not Used
10.
Not Used
11.
Squelch Disable
12.
Audio Output
13.
Carrier Detect
14.
PTT
15.
Ground
Power
Supply
Motorola RNet Series
Telemetry Radio
15 pin D-connector
1
2
3
4
5
6
7
8
8
15
7
13
14
6
5902 Termination Block
Tx/Rx
+
+
+
+
----
----
----
----
Rx
KEY
RCD
Connections shown for:
Carrier detect active high
PTT active low
Channel 1 enabled
Squelch enabled
Figure 12: Typical Connection to Motorola Radio
