SeaRAQ 6 Isolated Thermocouple Inputs (Type E, J, or K)

Part: 6512   Model: SeaRAQ-6512

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SeaRAQ™ I/O expansion modules provide unprecedented expansion capabilities for Sealevel Relio R3 and Relio R4 industrial computers. The SeaRAQ 6512 analog expansion board is specifically designed to interface inexpensive thermocouples. To simplify temperature calibration in the field, cold junction compensation is provided on the board.

To protect the host computer from harmful voltage spikes commonly found in industrial environments, the 6512 provides 1500 VAC isolation. For easy, reliable field wiring, the board uses removable, high-retention terminal block connectors and is compatible with type E, J, and K thermocouples.

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 jump start 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

A/D Inputs

6 Thermocouple Inputs

A/D Resolution


Analog I/O

Thermocouple Inputs




PCB is 6.00" (L) x 4.35" (W)

Extended Temperature

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Field Wiring

16 – 30 AWG

Humidity Range

10 – 90% Relative Humidity, Non-Condensing

Input Isolation

1500 VAC RMS (Field-to-Logic)

Input Impedance

>20 MOhms

Input Type

E (Chromel-Constantan), J (Iron-Constantan), or K (Chromel-Alumel) Thermocouples


Modbus RTU

Operating Temperature

0°C to 70°C (32°F to 158°F)

Plate Connectors

High-Retention, Removable Terminal Blocks

RoHS Compliant


Storage Temperature

-50°C to 105°C (-58°F to 221°F)

  • Expansion module with six (6) isolated thermocouple inputs
  • Compatible with type E, J, or K thermocouples
  • 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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