Saia-Burgess
Controls Ltd.
Hardware Manual for the PCD3 Series│Document 26/789; Version E 5│31.01.2005
Hardware
PCD3.W3x5
5-50
5
5.4.3 PCD3.W3x5, analogue inputs, galvanically separated, 7 channels, 12 bit
resolution
Application
Fast input modules for general application with 7 channels, each with 12 bit resolution
and galvanic separation. Different variants for voltage 0...10 V, -10 V...+10 V and
current 0...20 mA are available.
Module overview
Resolution *)
PCD3.W305:
Voltage 0...10 V
2.5 mV
PCD3.W315:
Current 0...20 mA
5 μA
PCD3.W325:
Voltage -10...10 V
5 mV
*) Resolution = value of the least signifcant bit (LSB)
Technical data
Input ranges:
see above Module overview
Galvanic separation:
yes
Resolution (digital representation): 12 bits (0...4095)
Measuring principle:
Non-differential, voltage divider
Input resistance:
W305:
13.5 kΩ / 0.1%
W315:
120 Ω / 0.1%
W325:
13.7 kΩ / 0.1%
Accuracy at 25°C:
± 0.15%
Repeating accuracy:
± 0.05%
Temperature error (0...+55°C):
± 0.25%
A/D conversion time:
≤ 2 ms
Overvoltage protection:
W305:
± 40 VDC (permanent)
W325:
+ 40 VDC (permanent)
Overcurrent protection:
W315:
± 35 mA (permanent)
EMC protection:
yes
Time constant of input filter:
typ. 2.4 ms
Internal current consumption:
(from +5 V bus)
< 60 mA
Internal current consumption:
(from V+ bus)
0 mA
External current consumption:
0 mA
Terminal:
Pluggable 14-pole cage clamp terminal (4 405 4999 0)
for wires up to 1.5 mm²
