405.1200.037.2 - Rel.: 2.21 of 25/02/2008
31-3
MSP serial
port
The MSP (Multi Serial Port) is present on all VTs and is used to connect other
devices including the PC used to transfer the project. It consists of a connector
(D-Sub 25 pin female) and can communicate using RS232, RS422, RS485 and
C.L. (TTY-20mA).
Pin 16 does not provide for commuting any kind of load (coils etc.);
an input disturbance at Pin 16 can cause the VT and therefore also
the industrial process itself to malfunction.
Strong input disturbances at Pin 16 could damage the VT.
Before connecting in RS422/485, check the polarities. With some
devices the Tx+/Rx+ and Tx-/Rx- signals or the polarities are
inverted.
Pin
Signal
Notes
1
N.C.
Not connected
2
Tx OUT
RS232
3
Rx IN
RS232
4
RTS OUT
RS232
5
CTS IN
RS232
6
N.C.
Not connected
7
Signal GND
Internal reference 0Volt
8
N.C.
Not connected
9
Tx +OUT
C.L. (TTY-20mA) Current loop
10
Tx/Rx -IN/OUT
RS485
11
Tx -OUT
C.L. (TTY-20mA) Current loop
12
Tx -OUT
RS422
13
Rx +IN
RS422
14
IKT OUT
C.L. (TTY-20mA) Current loop
15
IKR OUT
C.L. (TTY-20mA) Current loop
16
+5Vdc (150mA Max.)
Reserved for Esa
17
N.C.
Not connected
18
Rx +IN
C.L. (TTY-20mA) Current loop
19
N.C.
Not connected
20
N.C.
Not connected
21
N.C.
Not connected
22
Tx/Rx +IN/OUT
RS485
23
Tx +OUT
RS422
24
Rx -IN
RS422
25
Rx -IN
C.L. (TTY-20mA) Current loop
MSP
Multi Serial Port
25 pin female
Содержание VT130W
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