ADLINK USB-2401 User Manual
Page 13
Introduction
3
USB-2401
Voltage
±25V
±12.5V
±2.5V
±312.5mV
±25V
±12.5V
±2.5V
±312.5mV
Current
±20mA
2.5V
Thermocouple
K, J, N, R, S, B, T, E 78.125mV
RTD (3-wire, 4-wire)
Pt 100, Pt 1000
2.5V
Half-Bridge (120Ω, 350Ω)
Max. 30mV/V
78.125mV
Full-Bridge (120Ω, 350Ω)
Max. 30mV/V
78.125mV
2-Wire Resistance
30kΩ
2.5V
Excitation voltage
2.5V (for half/full-bridge mode only)
Excitation current
0.5mA for RTD mode
0.05mA for Resistance mode
Cold junction compensation
(CJC) accuracy
± 0.5°C (after 15 minute warmup)
Operational common mode
voltage range
Voltage input mode: Vcm+Vpp/2
≦ input
range (25V/12.5V/2.5V/ 0.3125V)
Current input mode: Vcm
≦ 24V
Overvoltage protection
Power on:
Voltage input mode: 30V
Current input mode: 60mA
Sensor input mode enable: no protection
Sensor input mode disable: 30V
Excitation voltage (EX+) and AGND: no
protection
FIFO buffer size
4k samples
Data transfers
Programmed I/O, continuous (bulk transfer
mode)
Input impedance
1.009MΩ for voltage input mode
249.5Ω for current input mode