SBC PCD1 Series Manual page 223

Saia-Burgess Controls AG
Terminals
Digital/analogue values
Output signals and type
PCD2.W605
+ 10.0 V
+ 5.0 V
0 V
Notes on the output range
Balancing the offset and the amplification is done for the PCD2.W6x5 digitally by the
µC. As there is no potentiometer, the output range has been slightly enlarged to cover
maximum values even in the worst case.
Typical output range (without component tolerances):
W605:
W615:
W625:
This range is broken down on a 10 bit scale (1024 steps), as before. The result is the
following LSB resolution:
W605:
W615:
W625:
With this balance the nominal range (0 ... 1 0 V) is now scaled 0 ... 1 023, making it
possible for the output value not to change on an increase of 1 LSB.
Manual Manual PCD 1 / PCD 2 Series │ D ocument 26 / 737 EN22 │ 2 013-11-26
PCD2.W615
+ 20 mA
+ 10 mA
+ 4 mA
0 mA
- 0.26 V ... + 10.36 V (instead of 0 ... + 10 V)
0 mA ... 2 1.4 mA (instead of 0 ... 2 0 mA)
- 10.62 V ... 1 0.36 V (instead of - 10 ... + 10 V)
1 LSB = 10.38 µV
1 LSB = 21.7 µA
1 LSB = 20.75 µV
Analogue output modules with electrically isolation
PCD2.W625 Classic
+10 V 1023
512
0 V
205
0
-10 V
Input/output (I/O) modules
Digital values
xx7 Simatic
1023 27684
512 13842
205 5530
0 0
5
5-87