Complete Isolation: Isolated Digital Inputs, Outputs and Communication Port

IA-3128S-U2i from Intelligent-Appliance, a leading designer and manufacturer of intelligent relay modules, specializing in Industrial automatic test equipment (ATE), was especially designed to withstand the harshest of industrial environments.

No relay board is an island

This special module has 24 relays and 24 Isolated Digital Input, which are not only isolated from the module itself, but also has isolation between each digital input to ensure smooth operation even in the noisiest industrial environment possible.
In addition to the digital input’s isolation, the IA-3128S-U2i also features Digital Filter with a variable frequency cut point, software controlled for fine tuning to best fit your specific application needs.

The two counters

Two Event Counter channels are implemented into the card’s facility, connected to the two last Digital Inputs ch-23 and ch-24, with a 500Hz maximum counting frequency, equal to 30,000 RPM in case of a pulse per revolution.

Suppressing Harassment

The “S” in the IA-3128S-U2i stands for Suppressors. This module features Transient Voltage Suppressors designed to protect the relays` contact from generating high EMI/RFI electromagnetic noise – resulting in significantly long relay life, and lowering maintenance costs.

Red Alert

One of the most unique features in the IA-3128S-U2i is its ability to alert the user in case there is any change in the digital input status. This feature is fully configurable and conditions can be set by software.


As a proud member of Intelligent-Appliance IA-3000 series members, the IA-3128S-U2i can be transparently chained using the RS-232 port, sharing the same communication port and resulting in latency free, slick, and efficient Multi-Relay-Board System.
Communication flow
The Intelligent-Appliance Two Watchdog System is also implemented into this module, designed to make sure that communication with the hosting computer flows uninterrupted.

The IA-3128S-U2i module is up to the highest standards - CE, FCC Approved, ROHS compliant.

As all other Intelligent-Appliance modules, The IA-3128S-U2i is software supported with a stocked .Net library, various open source examples, and software utilities which are thoughtfully designed to make the integration and implementation of this module into your specific
application as quick and easy as possible.

The IA-3128S-U2i module is part of the wide verity of feature rich, user friendly, and intelligent industrial relay boards developed and manufactured by Intelligent Appliance.

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