SeaRAQ 8 Channel-to-Channel Isolated A/D Inputs

Part: 6510   Model: SeaRAQ-6510


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SeaRAQ™ I/O expansion modules provide unprecedented expansion capabilities for the Sealevel Relio R3 and Relio R4 industrial computers. The 6510 provides eight general purpose 16-bit A/D channels that can be individually configured for 4-20 mA current loop, 0-5V or 0-10V voltage inputs. For maximum protection from damaging external voltages commonly found in industrial environments, the SeaRAQ 6510 expansion board includes 1500 VAC of channel-to-channel and field-to-logic isolation.

The current loop receiver inputs are ideal for interfacing a wide variety of industrial process control and test equipment that use 4-20 mA signaling. The 4-20 mA standard remains a popular method for signal transmission in harsh environments, even over long distances. Current loop has a low sensitivity to electrical noise and is not affected by signal loss over cable runs or interconnections. 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

Humidity Range

10 – 90% Relative Humidity, Non-Condensing

A/D Inputs

8 Analog Inputs

A/D Resolution


Analog I/O

A/D Inputs




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

Extended Temperature

Call for Options

Field Wiring

16 – 30 AWG

A/D Range

0-20 mA, 4-20 mA, 0-5V, 0-10V

Input Isolation

1500 VAC RMS (Channel-to-Channel and Field-to-Logic)

Input Impedance

250 Ohms


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 – +105C

  • General purpose A/D expansion module with eight (8) 16-bit, single-ended inputs
  • 1500 VAC field-to-logic and channel-to-channel isolation
  • Each input can be individually configured for 4-20 mA, 0-5V or 0-10V
  • 18-32 VDC user loop voltage range in 4-20 mA current mode
  • 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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