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SeaI/O-520S
SeaI/O-520S

Part# 520S

(SeaI/O-520S)

RS-232 Modbus RTU Interface to 8 Isolated Inputs / 8 High-Current Form C Relay Outputs



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Control and monitor 8 optically isolated inputs and 8 (SPDT) high-current Form C relay outputs with the SeaI/O-520S. Inputs can range from 5-30VDC and optical isolation protects the computer and other sensitive equipment from voltage transients and ground loops that are common in industrial environments. The high-current Form C relays can switch up to 6A loads at 250VAC and up to 5A at 60VDC. Form C relays can be wired for either normally open or normally closed operation. The SeaI/O-520S is powered from your 9-30VDC source, or select from a variety of Sealevel power supply options.

Communicate with the SeaI/O-520S using industry standard Modbus RTU protocol or use the Sealevel SeaMAX API software libraries from your application program. Sealevel's SeaMAX software drivers and utilities make installation and operation easy using Microsoft Windows and Linux operating systems.

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.

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.
Brand/Family SeaI/O
Host Interface RS-232
# of Ports 8/8
Digital I/O Isolated Inputs, Form C Relay Outputs
Number of Inputs/Outputs 8 Inputs
8 Outputs
Input Isolation 300V
Input Range 5-30 VDC
Contact Voltage 250VAC
60VDC
Contact Current AC 6A max.
Contact Current DC <30 VDC @ 5A max.
>30 VDC @ 500mA max.
Switching Capacity 5 VDC @ 100mA min.
Contact Operate Time 10ms max.
Contact Release Time 10ms max.
Power Requirement 9-30 VDC @ 3.7W
Operating Temperature 0 - +70C
Extended Temperature Call for Options
Storage Temperature -50 - +105C
Humidity Range 10 - 90% Relative Humidity, Non-Condensing
Dimensions 7.5 (L) x 5.1 (W) x 1.3 (H)
  • • RS-232 Modbus RTU interface
  • • 8 optically isolated inputs
  • • 8 SPDT high-current Form C relays
  • • Removable screw terminals simplify field wiring
  • • Input power via terminal block or modular connector
  • • DIN rail or table mount
  • • Sealevel SeaMAX software supports Microsoft Windows and Linux operating systems








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