ADLINK USB-2401 - 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