Sealevel's 4402 Ethernet to serial server is the easiest way to connect RS-422 or RS-485 serial devices to your Ethernet network. SeaLINK® products use industry standard RFC 2217 TCP/IP protocol for maximizing compatibility with the widest range of applications and devices.
Sealevel's SeaLINK software drivers and utilities make installation and operation easy using Microsoft Windows operating systems. After software installation, the 4402's serial ports appear as virtual COM ports to the host machine. Standard serial operating calls are transparently redirected to the 4402, guaranteeing compatibility with legacy serial devices and enabling backward compatibility with existing software. Serial tunneling is also supported, allowing two native serial devices to communicate over a network. Alternatively, raw data socket mode is supported, eliminating the need for a driver.
To simplify installation and configuration, a printed copy of the SeaLINK QuickStart Guide is included with all Ethernet serial server orders.
Sealevel's SeaLINK software drivers and utilities make installation and operation easy using Microsoft Windows operating systems. After software installation, the 4402's serial ports appear as virtual COM ports to the host machine. Standard serial operating calls are transparently redirected to the 4402, guaranteeing compatibility with legacy serial devices and enabling backward compatibility with existing software. Serial tunneling is also supported, allowing two native serial devices to communicate over a network. Alternatively, raw data socket mode is supported, eliminating the need for a driver.
To simplify installation and configuration, a printed copy of the SeaLINK QuickStart Guide is included with all Ethernet serial server orders.
| Host Interface | Ethernet |
|---|---|
| # of Ports | 4 |
| Brand/Family | SeaLINK |
| Electrical Interface | RS-422, RS-485 |
| Serial Connector(s) | DB9M |
| Max Data Rate | 230.4K bps |
| Max Data Distance | 4000 feet |
| Operating Temperature | 0 - +70C |
| Storage Temperature | -50 - +105C |
| Humidity Range | 10 - 90% Relative Humidity, Non-Condensing |
| Power Requirement | +5V @ 1A |
| Dimensions | 8.6 (L) x 6.1 (W) x 2.0 (H) |
- • Ethernet 10/100BaseT (autosense)
- • Each port individually configurable for RS-422 or RS-485
- • Automatic RS-485 enable/disable
- • Appears as a virtual COM port to host machine
- • Data rates to 230.4K bps
- • Supports custom baud rates and 9-bit protocol
- • Hot-swappable
- • Built-in watchdog/reset circuit for fault tolerance
- • Four DB9M connectors
- • DIN rail mounting option (Item # DR103)
- • Includes 120V AC adapter that outputs 5VDC @ 2.4A (Item# TR101)
- • Includes 7' Ethernet patch cable (Item# CA246) and 7' Ethernet crossover cable (Item# CA251)
- • Sealevel SeaLINK software supports Microsoft Windows and Linux operating systems
![]() Part#TB34 Terminal Block $8.95 |
![]() Part#DR103 DIN Rail Mounting Clips $9.95 |
![]() Part#TB05 Terminal Block $19.95 |
![]() Part#RK2U 2U 19 In. Rack Tray $59.95 |
![]() Part#POE-SP-EX Power Over Ethernet Extractor $49.95 |
![]() Part#DB103 DB9F to Opto 22 DB9F $9.95 |
![]() Part#CA247 CAT5 UTP 10' Patch Cable $9.95 |
![]() Part#KT105 Terminal Block Kit $28.95 |
![]() Part#CA127 DB9 Serial Extension Cable $9.95 |
![]() Part#TB06 Terminal Block $24.95 |
![]() Part#RK-CLAMP Rackmount Clamp $19.95 |
![]() Part#POE-SP-KT Power Over Ethernet Kit $54.95 |
![]() Part#RJ9S8 Modular Adapter $3.95 |
![]() Part#CA251 Ethernet Crossover Cable $8.95 |
![]() Part#KT106 Terminal Block Kit $43.95 |
![]() Part#CA246 CAT5 UTP 7' Patch Cable $8.95 |





















