Precision You Can Trust
NABL-Accredited Calibration | Available on Request
The SeaI/O-440U-OEM provides 32 SPST Form A Reed relays for industrial control via USB, using Modbus RTU. It offers reliable dry contact switching for low-current devices, with easy wiring via removable screw terminals..
The SeaI/O-440U-OEM is a USB-based I/O module featuring 32 SPST Form A Reed relays, ideal for controlling low-current devices such as alarms, HVAC systems, and security controls. The Reed relays offer long-life switching and can handle DC loads up to 60VDC @ 500mA.
Communication is done through USB using Modbus RTU, making it easy to integrate with control systems and software. The module is powered via a 9–30VDC source, and removable screw terminals simplify wiring in industrial settings.
For added security, the SeaLATCH USB port ensures a metal-to-metal connection with USB cables, preventing accidental disconnections. The SeaI/O-440U-OEM supports up to 246 additional SeaI/O N-series modules for system expansion.
32 SPST Form A Reed Relays – Switch up to 60VDC @ 500mA, perfect for low-current devices
Sealevel SeaMAX API – Supports integration with Windows and Linux systems
Sealevel SeaLATCH USB Port – Provides a secure connection with USB cables via metal thumbscrews
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
USB Communication – Uses Modbus RTU over USB for easy integration with control systems
Board-Only Design – Compact and ready for custom enclosures
Included USB Cable – Comes with a 6' USB Type A to SeaLATCH USB Type B cable (Item# CA356)
| Parameter | Details |
|---|---|
| Model Number | 440U-OEM |
| Form Factor | Board Only |
| Host Interface | USB |
| Communication Protocol | Modbus RTU |
| Number of Inputs | 0 |
| Input Type | N/A |
| Number of Outputs | 32 |
| Output Type | Form A Reed Relays (60VDC @ 500mA) |
| Power Requirement | 9–30 VDC @ 2.7W |
| 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) |