DI-4108 and DI-4208 Hardware Manual
Specifications
3
2. Specifications
Analog Inputs
Number of Channels:
8
Channel Configuration:
Differential
Measurement range per channel:
DI-4108: Programmable ±200, ±500 mV, ±1, ±2, ±5, ±10 V
DI-4208: Programmable ±2, ±5, ±10, ±20, ±50, ±100 V
Input impedance:
DI-4108: 100 k
differential
DI-4208: 795 k
differential
Absolute accuracy:
0.25% of full scale range @ 25°C, excluding common mode error
Absolute maximum input without damage: 120 V rms (normal mode + common mode)
Maximum common mode voltage:
Common mode range:
±20 V dc or peak ac
Common mode rejection ratio:
50 dB (dc - 60 Hz)
Channel-to-channel crosstalk rejection:
-80 dB
ADC Characteristics
Resolution:
12- to 16-bit
Above zero ADC counts: 2,047 to 32,767
Below zero ADC counts: 2,048 to 32,768
Max. throughput sample rate:
Standard: 160 kHz
Stand-alone: 20 kHz to 160 kHz (dependent on flash memory)
Min. throughput sample rate:
Standard: 20 Hz (2.2 samples per hour with WinDaq)
Stand-alone: 0.0017 Hz
Sample rate timing accuracy:
50 ppm
Digital Ports
Number of Ports:
7
Type:
MOSFET switch
Configuration:
Programmable as digital input or switch
Threshold levels
TTL compatible
Absolute maximum applied voltage (V): 25 V dc
Reserved Digital Inputs
Port 1:
W
IN
D
AQ
remote events
Port 2:
W
IN
D
AQ
remote start/stop
Port 3:
Rate input
Port 4:
Count input
Count/Rate/Digital Inputs
Internal pull-up value:
4.7 k
Input high voltage threshold:
2.4 V
