8 16-bit A/D, 8 Isolated Inputs, 8 Form C Relay Outputs SeaI/O Expansion Module

Part: 570N   Model: SeaI/O-570N


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The SeaI/O-570N, designed using the Linear Technology LTC1867 A/D chip, adds eight single-ended 16-bit analog inputs, eight optically isolated inputs and eight Form C relay outputs to your SeaI/O network.

Compatible with all SeaI/O base units (Ethernet, USB, RS-485, RS-232), the SeaI/O-570N easily connects using an RS-485 input. Cabling is accomplished via the RJ45 pass-through connector or removable screw terminals. RS-485 line conditioning allows easy configuration of termination and pull-up/pull-down resistors via external dipswitches.

All SeaI/O N-series expansion modules ship with an expansion and strap kit that includes four metal straps, four #4-40 screws, and a 5″ RJ45 RS-485 interconnect cable. The metal straps allow you to connect multiple SeaI/O modules together in a stack. The interconnect cable can be used to connect SeaI/O modules together via the RJ45 pass-through connectors, providing an easy method to cascade RS-485 signals and power from one module to the next. Alternatively, use inexpensive CAT5 cabling to pass data signals between SeaI/O modules to create a distributed I/O network.


Additional information

A/D Chip

Linear Technology LTC1867

Input Isolation

2500 VAC RMS, 3500 VDC

Storage Temperature

-50°C to 105°C (-58°F to 221°F)

RoHS Compliant


Power Requirement

9-30 VDC @ 2.3W

Power Connector

1.3mm Barrel, Terminal Block, RJ45 Pass-Through

# of Ports


Output Type

Form C Relay

Output Specification

24 VDC @ 1A

Operating Temperature

-20°C to 70°C (-4°F to 158°F)

Number of Inputs/Outputs

16 Inputs / 8 Outputs

Host Interface(s)


Input Impedance

6.2 K Ohms (in series)

Input Range

5-30 VDC

Humidity Range

10 – 90% Relative Humidity, Non-Condensing

A/D Inputs

8 Single-Ended

Field Wiring

16 – 30 AWG

Extended Temperature

Call for Options


7.5 (L) x 5.1 (W) x 1.3 (H)

Digital I/O

Form C Relay Outputs, Isolated Inputs

Contact Voltage

30VDC max.

Contact Release Time

5ms max.

Contact Operate Time

5ms max.

Contact Current

2A max.

Contact Bounce Time

7ms max.



Analog I/O

A/D Inputs

A/D Resolution


A/D Range

+/-5V, +/-15V

Switching Capacity


  • Quick connection to SeaI/O devices using RJ45 connector or removable screw terminals
  • 8 single-ended 16-bit analog inputs
  • 8 optically isolated inputs
  • 8 Form C relay outputs
  • Removable screw terminals simplify field wiring
  • Input power via terminal block or modular connector
  • DIN rail or table mount
  • Includes expansion and strap kit (item# KT122)

Windows Software

Software: SeaMAX - Windows

Linux Software

Software: SeaMAX - Linux


Datasheet: 570N


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