420U

DIGITAL INPUT RELAY OUTPUT ADAPTER

SeaI/O USB Adapters  •  USB
420U Digital Input Relay Output Adapter
420U - USB Modbus RTU to 16 Isolated Digital Input/8 Form C Relay Output Adapter (SeaI/O-420U)
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 fully adheres to the Restriction of Hazardous Substances Directive 2002/95/EC, RoHS for short.  The directive covers the restriction of use of certain hazardous substances in electrical and electronic equipment and was adopted in February 2003 by the European Union.
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.
From
£223

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420U-ROHS
USB Modbus RTU to 16 Isolated Digital Input/8 Form C Relay Output Adapter
No stock
£223
Peripheral information
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Lead time*
1 off price**
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Expansion and Strap Kit - for SeaI/O, Relio R1100 Systems
2 in stock
£10
SeaLATCH USB Type A to USB Type B Device Cable, 72" in Length
No stock
£12
RS-485 Interconnect Cable, 5" in Length - for SeaI/O, Relio R1100 Systems
No stock
£4
SeaLATCH USB Type A to SeaLATCH USB Type B Device Cable, 72" in Length
No stock
£12
Universal Mounting Bracket (VESA) - for SeaI/O, Relio R1000 Systems
No stock
£81
Flush Mount Bracket Kit - for SeaI/O, Relio R1000 Systems
No stock
£19
Terminal Blocks - SeaI/O Spring Clamp Upgrade Kit
No stock
£35
All prices exclude VAT at current rate.
Minimum order value - £50 (exc. VAT and delivery).
Free delivery of the 420U 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)

420U overview

  • Manufacturer : Sealevel Systems
  • Host Interface : USB Modbus RTU
  • Total Channels : 24
  • Inputs : 16 x Optically Isolated Digital Inputs
  • Input Range : 5-30V DC
  • Input Isolation : 300V
  • Outputs : 8 x Form C Relay (SPDT) Outputs
  • Max. Contact Voltage : 60V DC max.
  • Max. Contact Current : 2A max. 
  • Enclosure : Housed in rugged, attractive steel enclosure
  • I/O Connector : 4-bit segments that each share a common for easy wiring via removable 3.5mm terminal blocks
  • USB Connector : Includes CA356 - 72" USB Type A to SeaLATCH USB Type B cable
  • Other Features : Input power via terminal block or modular connector
  • Patent-pending SeaLATCH USB port provides locking connection with SeaLATCH USB cables via metal thumbscrews
  • DIN rail or table mount
  • Dimensions (WxHxD) : 7.5" x 1.3" x 5.1" 
  • Power Requirement : 9-30V DC @ 2.2W (TR108 24V DC PSU available)
  • Operating Temperature : 0 to +70C (extended temperature options available)
  • Software Support : SeaMAX supports Linux, Windows 2000, XP, Vista and Windows 7 
  • Warranty : Lifetime Warranty
Control and monitor 16 optically isolated inputs and 8 Form C (SPDT) relay outputs via any USB connection with the SeaI/O-420U. Inputs can range from 5-30V DC, while the Form C relays switch up to 60V DC @ 2A.

Inputs and outputs are grouped in four-bit segments that each share a common for easy wiring via removable 3.5mm terminal blocks.

The SeaI/O-420U is powered from your 9-30V DC source, or select from a variety of Sealevel power supply options.

Communicate with the SeaI/O-420U using the Sealevel SeaMAX API software libraries or use any Modbus RTU compliant device. Sealevel's SeaMAX software drivers and utilities make installation and operation easy using Windows and Linux.

Expand your I/O network with SeaI/O "N" series products. SeaI/O modules are available with Reed and Form C relays, optically isolated inputs, TTL interfaces, A/D and D/A functionality. Up to 246 additional expansion modules can be added using convenient pass-through connectors.

The SeaI/O-420U integrates a patent-pending SeaLATCH USB port, which is fully compatible with standard USB cables. When used with the included USB cable with a SeaLATCH USB type B connector, the metal thumbscrew provides a secure connection to the device and prevents accidental cable disconnection.

OPC-UA
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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