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SEALEVEL | SeaIO

SeaI/O-420U-OEM

Now includes NABL Calibration Certificate.
Rs. 32004.00

The SeaI/O-420U-OEM features 16 optically isolated inputs and 8 SPDT Form C relays for industrial control and monitoring over USB using Modbus RTU. With easy field wiring and a secure USB connection, it’s perfect for monitoring applications like alarm systems and HVAC controls..

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  • Detail
  • Special Features
  • Specification

The SeaI/O-420U-OEM is a USB-based I/O module offering 16 optically isolated inputs and 8 SPDT Form C relays. The optically isolated inputs are perfect for safely interfacing with high-voltage or noisy electrical systems, with a range of 5-30VDC.

The Form C relays provide long-life switching and can handle DC loads up to 60VDC @ 2A, making it ideal for controlling low-current devices in industrial settings. These relays are configurable for either normally open or normally closed operation.

The module communicates over USB using Modbus RTU, which simplifies integration with computers and control systems. The SeaI/O-420U-OEM is powered by a 9–30VDC source, and removable screw terminals make it easy to wire and install.

For added reliability, the SeaLATCH USB port ensures a secure metal-to-metal connection with USB cables, preventing accidental disconnections. The module also supports up to 246 additional SeaI/O N-series modules for system expansion.

  • 16 Optically Isolated Inputs – Ideal for controlling and monitoring sensors, switches, and industrial equipment with an input range of 5-30VDC

  • 8 SPDT Form C Relays – Switch up to 60VDC @ 2A, perfect for controlling low-current devices

  • Sealevel SeaMAX API – Supports integration with Windows and Linux operating systems

  • Sealevel SeaLATCH USB Port – Provides secure connection with metal thumbscrews to prevent accidental cable disconnections

  • Power Input – Operates on 9–30VDC, with optional Sealevel power supply options

  • Removable Screw Terminals – Simplifies field wiring for easy installation

  • Expansion Capability – Supports up to 246 additional SeaI/O N-series modules for scaling I/O systems

  • Included USB Cable – Comes with a 72-inch USB Type A to B cable for easy connection

  • DIN Rail or Table Mountable – Flexible mounting options for various environments

  • Board-Only Design – Compact and ready for custom enclosures

Parameter Details
Model Number 420U-OEM
Form Factor Board Only
Host Interface USB
Communication Protocol Modbus RTU
Number of Inputs 16
Input Type Optically Isolated Inputs
Number of Outputs 8
Output Type Form C Relays (60VDC @ 2A)
Power Requirement 9–30 VDC @ 2.2W
Expansion Capability Supports up to 246 SeaI/O N-Series Modules
Software Compatibility SeaMAX API (Windows/Linux), Modbus RTU
iOS App Support N/A
Operating Temperature 0°C to 70°C (32°F to 158°F)
Storage Temperature -50°C to 105°C (-58°F to 221°F)
Humidity Range 10–90% RH, Non-Condensing
Dimensions (inches) 7.5" (L) x 5.0" (W) x 0.8" (H)