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KCT-31
OUTLINE/FEATURES/TERMINAL FUNCTION/INSTALLATION
OUTLINE
1. The KCT-31 is a RS-232C interface cable for LMR Mobile
radios, TK-780,880,980,981 and TK-785,885.
The 9-pin (D-sub) connector is connected to an external
RS-232C terminal.
The other end of the cable is connected to the internal
connector of LMR mobile radio.
Note: You cannot write a firmware with the KCT-31.
FEATURES
1. This KCT-31 has a RS-232C-TTL level interface circuit.
2. This KCT-31 does not require an external power supply.
3. This KCT-31 can be used up to 9600 bps.
4. Compatible with an ER terminal of DTE that has the voltage
6V or more.
TERMINAL FUNCTION
D-SUB Connector
Pin No. I/O
Port Name
1
I
CD
2
I
RD
3
O
SD
4
O
ER
5
-
SG
6
I
DR
7
O
RS
8
l
CS
9
-
CI
5
9
2
Function
Carrier detect
Receive data
Transmit data
Data terminal ready
Signal ground
Data set ready
Request to send
Clear to send
Ring indicator
1
6
INSTALLATION
Note: When the COM 1 is used, A connector is unused.
When the COM 2 is used, C connector is unused.
1. Bind the unused connector to the cable with a retaining
band as shown.
C
Green
B
Red
Black
When the COM 1 is used.
A
Green
B
Red
Black
When the COM 2 is used.
Fig. 1
connector
A
B
C
O
M
1
N
O
Y
E
S
C
O
M
2
Y
E
S
Y
E
S
2. Make sure the unit's power is tuned off.
Yellow
A
Yellow
C
C
Y
E
S
N
O
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