Home SEALEVEL | USB Serial Adapters SeaI/O-687U-OEM: USB to 8-Port RS-232/485 VersaCom Serial Adapter
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SEALEVEL | USB Serial Adapters

SeaI/O-687U-OEM: USB to 8-Port RS-232/485 VersaCom Serial Adapter

Now includes NABL Calibration Certificate.
Rs. 63881.00

The SeaI/O-687U-OEM is an 8-port USB-to-serial OEM adapter board supporting both RS-232 and RS-485 via VersaCom RJ45 connectors. Designed for seamless integration into custom industrial platforms, it offers high-speed connectivity and compact flexibility for embedded systems..

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  • Special Features
  • Specification

The SeaI/O-687U-OEM brings industrial-grade serial communication to embedded OEM systems through a USB interface. Its innovative VersaCom RJ45 connectors broadcast both RS-232 and RS-485 signals, allowing simple device pinout selection for rapid deployment.
Engineered for use in compact ITX, EBX, EPIC, or ATX platforms, the board delivers 8 high-speed serial ports with a robust data throughput of up to 921.6K bps.
The device uses a state-machine-based USB/UART bridge to lower CPU usage during concurrent communications. It integrates easily into custom builds with a board-only footprint and 9–30VDC input flexibility.
An RS-485 passthrough port expands connectivity options, allowing daisy-chaining of SeaI/O N-series OEM expansion modules—ideal for complex industrial I/O environments.

  1. OEM 8-port serial adapter with RS-232 and RS-485 support

  2. VersaCom RJ45 ports output RS-232 and 2-wire RS-485 simultaneously

  3. High-speed communication up to 921.6K bps

  4. Compact board-only design for embedded platforms

  5. No internal jumpers or DIP switches—pinout configuration only

  6. Powered from 9–30VDC with fused power on RJ45 pin 5

  7. High-retention USB Type B connector for secure cabling

  8. RS-485 passthrough for connecting up to 246 N-series OEM expansion boards

  9. State-machine architecture reduces host CPU load

  10. Compatible with standard COM port drivers in Windows and Linux

Parameter Value
Model SeaI/O-687U-OEM
Host Interface USB
Number of Ports 8
Serial Interface RS-232, RS-485
Serial Connector(s) RJ45 VersaCom
Max Data Rate 921.6K bps
Max Data Distance 50 feet (RS-232), 4000 feet (RS-485)
Power Requirement 9–30VDC
USB Powered No (requires external 9–30VDC input)
USB Specification USB 1.1 Compliant; USB 2.0 Compatible
Dimensions 7.5" (L) x 5.1" (W) x 1.3" (H)
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% Relative Humidity, Non-Condensing
Communication Chip USB/UART
High Retention USB Yes
Expansion Support RS-485 pass-through for SeaI/O N-series OEM boards
Product Family SeaI/O
Board or Enclosure Board only