ALFAMATIC Visual Point VP2STEP1 Installation Manual page 8

3.1.1 Power terminal block (X1)
The electronics and transducers are powered via the three-pole terminal block X1.
First name clamp
0VDC X1.1
PE X1.2
+24VDC X1.3
If the internal power supply is present, the switch behind the instrument must interrupt the phase and
the neutral before reaching the power supply itself. The output of the power supply must be connected
to the X1 terminal block.
This terminal block does not power the input/output section which is separated by opto-isolators from
the instrument electronics. To power the input and output section, connect terminals X3.11 and X3.12
to the power supply.
3.1.2 Serial port terminal block (CONN1 )
Present only in the Visual Point version with container.
On the back of the Visual Point with container there is a D-Sub 9-pin male connector for the RS232
serial connection. The pinout of the connector is as follows:
3.1.3 Serial port terminal block (X9 )
Present only in the Visual Point version for panel mounting.
On the back of the Visual Point for panel mounting there is the X9 terminal board for the RS232 and
RS485 serial connection. The pinout of the connector is as follows:
3.81mm pitch terminal block.
First clamp Description
name
X9.1 Do not use
TX X9.2 RS232 output - signal to computer RX: connect to pin 2 of computer D-SUB 9 male connector
RX X9.3 RS232 input - signal from computer TX: connect to pin 3 of computer D-SUB 9 male connector
A+ X9.4 RS485 positive signal
B- x9.5 RS485 negative signal
Ground – signal reference: connect to pin 5 of the computer's male D-SUB 9 connector
0V X9.6
Function
Negative power supply
Earth connection
Positive feeding
Pin 2: RX incoming line of the Visual Point.
Pin 3: TX line outgoing from Visual Point.
Pin 5: GND signals mass
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