SBC PCD1 Series Manual page 203

Saia-Burgess Controls AG
Digital/analogue values
Input signals and type
PCD2.W300/W340 PCD2.W310/W340 PCD2.W340/50/60 Classic
+ 10.0 V
+ 5.0 V
0 V
Connection concept for voltage and current inputs
The voltage and current input signals are connected directly to the 10-pole terminal
block (E0 ... E 7). 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 ... W 340 Modules or
● current inputs with the PCD2.W310 and ... W 340 Modules
● 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 earthing
bar.
Manual Manual PCD 1 / PCD 2 Series │ D ocument 26 / 737 EN22 │ 2 013-11-26
+ 20 mA Calculate the appro-
priate values with the
+ 10 mA
formulae at the end
0 mA
of this section
9 8 7
E7
COM
Distributor *)
*) potential free
4095
2047
0
6 5 4 3 2 1 0
E6 E5 E4 E3 E2 E1 E0
Earthing bar
Input/output (I/O) modules
Analogue input modules
Digital values
xx7 Simatic
4095 27684
2047 13824
0 0
5
5-67