SeaI/O USB Adapters  •  USB
8203FX Digital IO Adapter
8203FX - USB to 48 Channel TTL Digital I/O Adapter (SeaLINK PIO-48)
CE is a mandatory standard for products on the market in the European Economic Area. By CE marking a product, the manufacturer ensures that the item meets the essential safety requirements set out in the applicable CE directive.
This product has a lifetime warranty against product failure (excludes user or enviromental damage).
The Federal Communications Commission (FCC) is an independent agency of the United States government that sets standards and governs the testing of conducted and radiated emissions such as EMI.
2 8203FX versions available

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Version information
Lead time*
1 off price**
Request qty / trade pricing**
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8203FX with standard specification
No stock
8203FX with UK AC Adapter
No stock
Peripheral information
Lead time*
1 off price**
Request qty / trade pricing**
Buy now
DIN Rail Mounting Clips
1 in stock
50-Pin IDC to 50-Pin IDC Ribbon Cable, 40" in Length
No stock
Single Point Discrete 24V DC Input Module
No stock
Quad Solid State Relay, AC Input
No stock
Quad Solid State Relay, AC Output
No stock
Quad Solid State Relay, DC Output
No stock
Discrete 24-Position Relay Rack
No stock
Quad 4-Position 16-Channel Relay Rack
No stock
All prices exclude VAT at current rate.
Minimum order value - £50 (exc. VAT and delivery).
Free delivery of the 8203FX to UK Mainland on orders over £150 (exc. VAT and delivery) when purchasing online - excludes Northern Ireland, Isle of Man, Isle of Wight, Scottish Islands and the Channel Islands.

* Lead time is indicative and is subject to change at time of ordering. Next business day delivery on in-stock products only (when ordered before 3pm).
** Contact us for quantity or project pricing.
† Additional delivery charge may be incurred for certain postcodes (calculated at checkout)

8203FX overview

  • Manufacturer : Sealevel Systems
  • Host Interface : USB
  • Total Channels : 48 (buffered TTL I/O)
  • Enclosure : Housed in rugged, attractive plastic enclosure
  • Connector : 2 x industry standard 50-pin solid-state relay rack connector
  • Cable : Includes CA-179 - 72" USB A to B cable
  • Other Features : Power (+5V) and ground provided on 50-pin header connector
  • 10K pull-up resistors on each bit
  • Each 8-bit port individually configurable as input or output
  • AC Adapter included
  • Operating Temperature : 0 to +70C
  • Software Support : SeaI/O Classic software supports Windows 98SE, ME, 2000, XP and Vista operating systems
  • Warranty : Lifetime Warranty
The 8203 USB digital I/O interface adapter provides 48 channels of buffered drive digital I/O. Connect 1 or 2 industry standard relay racks for PC based control and automation of equipment including sensors, switches, security control systems, and other industrial automation systems.

The 8203 digital I/O interface adapter contains 6 groups of eight-bit I/O ports, configurable as inputs or outputs to suit the automation task. The mode of each of the ports is user selectable as inputs or outputs by simply writing a control word to the port register.

This gives the user the ability to customize the combination of inputs and outputs as needed. Two 50-pin headers provide the interfaces to industry standard relay racks and terminal blocks.

Sealevel's SeaI/O Classic software drivers and utilities make installation and operation easy using Windows 98SE, ME, 2000, XP and Vista operating systems.

OPC-UA is supported by many of our communication and I/O products. If you are interested but not quite sure how to implement OPC-UA into your factory then get in touch.
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