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ITA-2: 16 Channel Ethernet Data Acquisition Node


ITA-2 Brochure - Issue A


ITA-2 Operating Manual - Revision 1.1 May 2007

Application Notes

Case Studies

General Describtion:

The ITA 2 is a 16 Channel Ethernet Acquisition Node in which the inputs can be paired for simultaneous sampling.

This enables X-Y plts and orbits from rotating machinery to be displayed. Displacement transducers (known as proximity or eddy current probes) are the most common measuring device for this type of application, and the ITA 2 is fully compatible with the input range of these devices. The node features programmable AC/DC coupling enabling high resolution vibration and DC gap measurements to be taken from the same probe.

Flexible trigger and tacho functions are available, enabling pre and post trigger and order analysis to be preformed. Gated acquisition is available ensuring that readings are taken when a machine is running.

The node communicates via a standard 10BaseT ethernet interface and supports UDP/IP and TCP/IP protocols. It comes in an IP66/NEMA4X enclosure with power supply.


  • 8 Simultaneous Input Pairs
  • 16 Single Input Option
  • Proximity Probe Compatible
  • Programmable AC/DC Coupling
  • Programmable Gain and Filters
  • Flexible Trigger Tacho Functions
  • 10BaseT Ethernet Interface

Technical Specifications

Analogue Inputs:
No of Channels: 16
Configuration: 8 simultaneous pairs of 16 single inputs
Input Voltage Range 0 to -24V
Coupling: AC or DC, configurable per channel
Voltage Protection: Fault protection to 40V
Common Mode: 40V between channels (including commons)
Anti-Alias Filter: Compound analog filter with roll-off better than 20th order filter with cut-off frequency related to sample rate
High Pass Filters: Programmable 4th order with corner frquencies 0.5, 2, 10 and 100 Hz
Channel Crosstalk: -75dB (typ.)
Amplitude Accuracy: +-2% typical passband
Harmonic Distortions: -75dB (typ.)
Acquisition Modes: Mode 1 - Data on Demand
Mode 2 - Data ready flag
Mode 3 - Data broadcast
No of Channels: 4
Coupling: 5-24 Vdc, isolated or non-isolated
Tacho Speed Range: 0.01Hz-10kHz using once-per-rev (divide-by-N up to 255 available)
Order Analysis: Phase-lock-loop for order analysis function
Averaging: 1, 2, 4, ... 32768 programmable
Trigger Delays: Pre-trigger delay up to 16384 and post-trigger up to 32768 samples
Event Trigger: 2 trigger inputs can be used as event inputs to synchronise sampling
Gated Acquisition: 2 trigger inputs can be used to enable and disable sampling
ADC: 16 bit
Sampling Rate: 64Hz to 51.2kHz
Effective Frequency 
Bandwidth Ranges:
0.15Hz-25Hz to 0.15Hz-20kHz
Dynamic Range: 96dB (theoretical)
Block Lengths 256, 512, 1024, 2048, 4096, 8192, 16384 or 32768 (max length 16384 with averaging and 8192 with averaging and pre-trigger)
Watchdog Function: Automatic recovery on power interruption or similar
Status: 4 LED\'s indicate system communication status
Interface Port: RS232, 9600 baud for diagnosis
Memory Buffer: 0.5 Mbyte free space
Protection: NEMA 4X, IP66
Enclosure: Powder coated mild stell standard, or stainless steel optional
Node Dimensions: 400 mm x 300 mm x 155 mm
Temperature: -20 C to 70 C
Power Supply: 7-12Vdc or 24Vdc, or 85-260V ac power supply (optional)
Power Consumption: 450mA approx when powered from 7-12Vdc, or 150mA when supplied from 24Vdc
Network: Ethernet
Medium: 10Base-T
Cable: CAT5 recommended
Connectors: Weidmuller terminal connectors
Speed: 10Mbits/sec
Isolation: 1000Vrms