Part#: 8511

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SeaRAQ 16 Isolated Digital Inputs (0-132 VAC)



SeaRAQ™ I/O expansion modules provide unprecedented expansion capabilities for Sealevel Relio R3 and Relio R4 industrial computers. The SeaRAQ 8511 expansion board adds 16 channels of isolated digital inputs rated for 0-132 VAC.

To protect the host computer from harmful voltage spikes commonly found in industrial environments, the 8511 provides 1500 VAC isolation. For easy, reliable field wiring, the board uses removable, high-retention terminal block connectors.

Sealevel’s SeaMAX software drivers and utilities make installation and operation easy using Microsoft Windows and Linux operating systems. Communicate using industry standard Modbus RTU protocol or use the Sealevel SeaMAX API software libraries from your application program.

Get a jumpstart on your digital I/O development with The Digital I/O Handbook that will provide helpful information that you will use again and again. Check out Chapter 1 for an overview of logic principles.

Additional information

Weight 1.5000 lbs
Dimensions 6.00 × 4.35 × 1.00 in

Digital I/O


Extended Temperature

Field Wiring

Humidity Range

Input Current

Input Isolation

Input Range


Number of Inputs/Outputs

Operating Temperature

Plate Connectors

RoHS Compliant

Storage Temperature

  • • Digital expansion module with 16 isolated AC digital inputs
  • • Inputs are compatible with 0-132 VAC input range
  • • 1500 VAC field-to-logic isolation
  • • Industry standard Modbus RTU interface
  • • Input power provided via backplane connector
  • • Field wiring is simplified via removable 3.5mm terminal blocks compatible with 16-30 AWG wire
  • • Includes 20-position, removable, high-retention Phoenix terminal blocks
  • • Sealevel SeaMAX software supports Microsoft Windows and Linux operating systems

Windows Software

Software: SeaMAX - Windows


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