SBC PCD2.M5 Series - Page 168

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Analogue input modules
Input/output (I/O) modules
6-57
6
Digital/analogue values
Input signals and type Digital values
PCD2.W300/W340 PCD2.W310/W340 PCD2.W340/50/60 Classic xx7 Simatic
+ 10.0 V + 20 mA
Calculate the
appropriate values
with the formulae
at the end of this
section
4095 4095 27684
+ 5.0 V + 10 mA 2047 2047 13824
0 V 0 mA 0 0 0
Connection concept for voltage and current inputs
The voltage and current input signals are connected directly to the 10-pole terminal
block(I0…I7).Tominimizetheamountofinterferencecoupledintothemoduleviathe
transmission lines, connection should be made according to the principle explained
below.
The following connection diagram shows a typical wiring layout for:
● voltage inputs with the PCD2.W300 and ...W340 modules or
● currentinputswiththePCD2.W310and...W340modules
89
E6
67
E4
45
E1
23
E0
01
E3 E2E5E7
Earthing bar
max. 20cm
COM
Distributor *)
*) potential free
● The reference potentials of signal sources should be wired to a common GND
connection(“–”and“COM”terminals).Toobtainoptimummeasurementresults,
any connection to an earthing bar should be avoided.
● If shielded cables are used, the shield should be continued to an external earth-
ing bar.