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7.4 Description of service connectors PIN
7.4.1 RS232 Interface
The DB9 connector in question is the SCM and TLC communications port through
which the system is controlled remotely.
The meaning of the signals present at the pins is immediate. Notice that the CTS is
not managed, in the sense that it is always active.
Type: DB9 female
1
1
2
6
3
4
5
6
7
8
9
2
7.4.2 I
C Interface
The I2C bus serial interface is used to transfer data between the SCM, the PTX-LCD
series exciters, the TLC telemetry system and the PJ-LCD amplifiers.
Pin 2 carries the data (Serial DAta), pin 3 the sampling clock (Serial CLock).
Pin 4 is a device external reset input (low active).
Type: DB9 female
1
1
2
6
3
4
5
6
7
8
9
User Manual
N.C.
TX_D
RX_D
N.C.
GND
+15V
N.C.
CTS
N.C.
GND
SDA
SCL
External Reset
GND
N.C.
N.C.
N.C.
N.C.
Rev. 1.0 - 05/05/03
TLC2000
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