Filter
Top Products
– 78 –
APPENDIX C
PCI-1712/1712L User’s Manual
Advantech Co., Ltd.
www.advantech.com
C.6 Differential Connections
a) Straight-through connection (factory
setting):
RAn = 0 Ω (short)
RAn+1 = 0 Ω (short)
RDn = none
CDn = none
b) 1.6 kHz (3dB) low pass filter
RAn = 5 kΩ
RAn+1 = 5 kΩ
RDn = none
CDn = 0.01 µF
f3dB =
c) 10 : 1 voltage attenuator:
RAn = 4.5 k Ω
RAn+1 = 4.5 kΩ
RDn = 1 kΩ
Cn = none
Attenuation =
d) 4 ~ 20 mA to 1 ~ 5 V
DC
signal
converter:
RAn = 0 Ω (short)
RAn+1 = 0 Ω (short)
RDn = 250 Ω (0.1% precision resistor)
CDn = none
3. Calculations
1
2π (RAn+RAn+1) CDn
RDn
RAn+RAn+1+RDn