Schemat konwertera RS232-PPI.pdf

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S7200CNV.DSN - S7200CNV - S7200
1
2
3
4
5
6
7
8
+5VDC
A
A
DL1
TX
R2
3K3
D1
1N4004
D2
1N4004
P1
C1
.01mF
U1
C2
.01mF
DL2
RX
P2
1
1
6
4
DC
1
6
2
U2
2
7
5
DC
3
R5
1K5
4
D
7
3
3
6
3
DE
A
8
6
2
8
4
R6
1K5
1
R
B
7
4
9
2
9
RE
B
5
5
B
13
12
SN75176
DB9 FEMALE
DB9 MALE
8
9
14
11
7
10
U3
LM317
VIN
WITH HEAT SINK
MAX232
3
VOUT
2
C3
.01mF
+ C4
.01mF
R7
220
R1
C
C
330
RV1
1K
R3
270
D3
1N4004
C5
.01mF
+
R4
270
D4
1N4004
NOTE
D5
1N4004
DZ1
5,1 V 1/2W
1.This converter doesn't isolate the RS232 (left) section from the RS485 section. Beware at voltage drop from one
to other earth or ground: this interface will be destroyed when discharge the current drop
2.In this drawing are not showed the power pins on ICs they are: IC1:VCC(16),GND(15) IC2:VCC(8),GND(5)
Corrieri Gabriele
D
Quick reference archive
D
3.Please take carefully to trim RV1 for obtain 5V, start with cursor of RV1 to ground, than you must measure on output
1.25V, then get up cursor to measure 5V. Make this operation without ICs mounted to prevent destroying if
output voltage raises over 5V.
Title
Siemens S7-200 PPI Converter
Size
Document Number
Rev
A4
QRA.0009/01
1.0
Date:
Wednesday, August 07, 2002
S heet
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