Home SEALEVEL | USB Serial Adapters SeaI/O-687U USB to 8-Port RS232/485 VersaCom Serial
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SEALEVEL | USB Serial Adapters

SeaI/O-687U USB to 8-Port RS232/485 VersaCom Serial

Now includes NABL Calibration Certificate.
Rs. 65151.00

The SeaI/O-687U is a robust 8-port USB-to-serial adapter that supports both RS-232 and RS-485 via VersaCom RJ45 connectors, offering seamless connectivity for industrial and embedded systems without the need for configuration switches or jumpers..

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  • Special Features
  • Specification

The SeaI/O-687U makes industrial device integration simple by offering eight USB-to-serial ports in a single rugged enclosure. Designed for flexibility, its VersaCom RJ45 serial connectors transmit both RS-232 and RS-485 signals, enabling effortless field setup with zero jumper configuration. This saves valuable time during installation or maintenance.
Each port supports data rates up to 921.6K bps and is accompanied by TX/RX status LEDs. The adapter is powered by a 9–30VDC source and also supplies power to peripherals via pin 5 on each connector.
Using a host system’s USB port, the SeaI/O-687U emulates standard COM ports, maintaining compatibility with traditional serial software. Its state-machine design optimizes throughput across all 8 ports with minimal CPU overhead. For scalability, an RS-485 passthrough enables seamless expansion via up to 246 SeaI/O N-series modules.

  1. 8-port RS-232/RS-485 VersaCom adapter for industrial USB integration

  2. Unique dual-mode RJ45 ports support both RS-232 and 2-wire RS-485 simultaneously

  3. Up to 921.6K bps high-speed serial communication

  4. State-machine architecture for reduced host CPU usage

  5. COM port emulation ensures compatibility with legacy applications

  6. USB 1.1 compliant and USB 2.0 compatible

  7. Powered by 9–30VDC input (with fused power output to peripherals)

  8. High-retention USB Type B connector prevents accidental disconnects

  9. Includes RS-485 pass-through for daisy-chaining SeaI/O N-series modules

  10. Ideal for SeaPAC, Relio R1000, and SeaI/O modular stacks

Parameter Value
Model SeaI/O-687U
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 (external power required)
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 modules
Product Family SeaI/O
Board or Enclosure Enclosure