Measurement Computing AI-EXP32 - Manual (Page 12)

12
Chapter 3
Specifications
All specifications are subject to change without notice.
Typical for 25 °C unless otherwise specified.
All specifications apply to all temperature and voltage input channels unless otherwise specified.
Specifications in italic text are guaranteed by design.
Compatibility
Table 1. Host product compatibility
Product name Product description
USB-2416-4AO  Full-speed, multiplexed 24-bit measurement system that provides up to 16 differential and up to 32
single-ended (SE) analog inputs.
 Eight high-speed lines of digital I/O and two 32-bit counters.
 Four 16-bit analog output channels with an update rate of 1000 S/s and an output range of ±10 V.
USB-2416  Full-speed, multiplexed 24-bit measurement system that provides up to 16 differential and up to 32
single-ended (SE) analog inputs.
 Eight high-speed lines of digital I/O and two 32-bit counters.
Analog input
Table 2. General analog input specifications
Parameter Conditions Specification
Number of channels Up to 32 channels individually software-configurable as
single-ended or differential.
Thermocouples require differential mode.
For each channel configured as differential, you essentially
lose a single-ended channel.
Channel configurations Temperature sensor input, software programmable to match
sensor type
Voltage input
Input voltage range Thermocouple mode ±0.078125 V
Voltage mode ±20 V, ±10 V, ±5 V, ±2.5 V, ±1.25 V, ±0.625 V, ±0.3125 V,
±0.15625 V, ±0.078125 V, software- configurable
Absolute maximum input
voltage CxH-CxL relative to GND ±30 V maximum (power on)
±10 V maximum (power off)
Input impedance 2 G
Ω (power on)
390
Ω (power off)
Input leakage current ±20 nA
Input voltage >±30V
(power on/off) ±1 uA maximum
Input capacitance 590 pf
Maximum working voltage
(signal + common mode) Voltage mode: ±20V
range ±20.01 V maximum
Voltage mode: all other
voltage input ranges ±10.25 V maximum
Crosstalk Adjacent channels 100 dB
Input coupling DC
Warm-up time 15 minutes minimum
Open thermocouple detect Automatically enabled when the channel is configured for a
thermocouple sensor.