4Software
4.4 Power Line Rejection
The
•50 Hz rejection: Scan Rate (SR) Range: 0.153Hz < SR <= 1Hz
•60 Hz rejection: Scan Rate (SR) Range: 1Hz < SR <= 1.667Hz
OMB-DAQ-USB-2401 Series Block Diagram
Power LED |
|
| Isolation |
| Barrier |
| Power Supply |
| Isolated |
Power Jack | Power Supply |
Local Power
USB |
|
Jack |
|
USB | MCU |
Controller | 32Bit |
Activity LED |
|
| Digital Isolators |
CJC
4 Analog Inputs
+12v
Gain = x2, 1/8
+12v output Excitation voltage
CJC
4
Analog Inputs
MUX
|
| SE/ |
| PGIA |
|
|
|
|
|
|
| ||
|
| DI |
|
|
| |
|
|
|
|
|
| |
|
|
|
|
|
| Gain = |
|
|
|
|
|
| |
|
|
|
|
|
| |
|
|
|
|
|
| x1,2,4,8,16 |
|
|
| 32,64 |
+12v output |
|
Excitation voltage | 1MΩ |
| |
CJC |
|
4 |
|
Analog Inputs |
|
+12v |
|
+12v output |
|
Excitation voltage |
|
CJC | MUX |
| |
4 |
|
Analog Inputs |
|
+12v output |
|
Excitation voltage |
|
| MUX |
| PGA |
|
| |
1MΩ |
|
| A/D |
| ||
|
|
|
|
| ||
|
|
|
|
|
|
|
Gain = x2, 1/8
|
|
|
|
| SE/ |
| PGIA |
|
|
|
|
|
| ||
|
|
|
|
| DI |
| |
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1MΩ 1MΩ
Figure 4-25. OM-DAQ-USB-2400 Block Diagram
4.5 Optical Isolation
Your DAQ unit is optically isolated from its host PC by up to 500 Vdc. This means that an inadvertent application of such voltage to the DAQ unit will not affect the PC. In addition to isolation, the device maintains all sensitive
4.6 A/D Conversion
| |
| converters. They provide complete |
the most demanding applications. | |
|