Motorola MTM5400 ユーザーズマニュアル
INSTALLATION
MTM5400 Mobile Terminal Installation Manual
63
25-Pin subD Connector
Data Expansion Head Enhanced:
Table 10 10-Pin TELCO Connector
Pin
Function
Description
1
Audio +
Balanced Audio + (Bidirectional)
2
Not Connected
3
BUS+
This is used for communication between the radio and an Enhanced Control Head.
4
Audio-
Balanced Audio - (Bidirectional)
5
Not Connected
6
Ground
Ground
7
Radio On/Off Control
This is the Enhanced Control Head service request input. A level of 5 volts
indicates that the Enhanced Control Head needs to communicate with the radio. In
addition it switches on the radio's voltage regulators. The idle state is a level below
0.6V.
indicates that the Enhanced Control Head needs to communicate with the radio. In
addition it switches on the radio's voltage regulators. The idle state is a level below
0.6V.
8
SCI_TX
This if for communication between the radio and the Enhanced Control Head.
9
FLT_A+
This voltage is at battery voltage level and is available as long as the radio is
connected to the supply voltage. The maximum current is 300mA. A fuse in the
radio prevents further circuit damage in case of shorting this pin to ground.
connected to the supply voltage. The maximum current is 300mA. A fuse in the
radio prevents further circuit damage in case of shorting this pin to ground.
10
Analog Ground
Analog Ground
Table 11 25-Pin subD Connector
Pin
Function
Description
1
GND
Ground
2
RS232_SCI_TX
Transceive data (RS232 line with RS232 level)
3
RS232_SCI_RX
Receive data (RS232 line with RS232 level)
4
RS232_RTS
Request to Send (RS232 line with RS232 level)
5
RS232_CTS
Clear to Send (RS232 line with RS232 level)
6
FLT_A+
Filtered unswitched U
B
+ / 200mA
7
Signal_GND
Ground for RS232
9
NC
Not Connected
10
NC
Not Connected
11
NC
Not Connected
12
SW_B+
Switched U
B
+/100mA
13