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SEALEVEL | USB Digital

SeaDAC Lite REL-4C Kit

Now includes NABL Calibration Certificate.

The SeaDAC Lite REL-4C Kit (8115-KT) is a USB-powered digital interface adapter that enables control of four high-current Form C (SPDT) relays. Designed for industrial-grade switching, it supports both normally open and normally closed configurations, offering maximum flexibility through a compact internal USB interface..

  • Detail
  • Special Features
  • Specification

The SeaDAC Lite REL-4C Kit offers precise control of four Form C (SPDT) relay outputs, making it ideal for switching high-current AC and DC loads in industrial environments. Each relay supports up to 6A at 250VAC or 5A at 60VDC and can be configured for normally open or closed operations. Discrete commons for each relay enable independent signal control.

Designed for embedded applications, the 8115-KT includes a 2mm 4-pin Molex vertical header for internal USB connections. Status LEDs provide visual indicators for relay activity and USB connectivity. The device is fully powered via USB, eliminating the need for external power sources.

Its compact design includes removable 3.5mm terminal blocks for quick field wiring and installation. SeaMAX software support ensures integration into Windows and Linux environments via the SeaMAX API. The Porthole-style mounting footprint simplifies system integration into Relio or custom enclosures.

  • 4 SPDT Form C Relays – switch up to 6A @ 250VAC or 5A @ 60VDC

  • Individually Isolated Relay Commons – discrete wiring per channel

  • Removable 3.5mm Terminal Blocks – simplifies field installation

  • USB Bus Powered – no external power supply required

  • Status LEDs – real-time I/O and USB activity indication

  • Porthole Mounting Footprint – standard 3.2" x 3.1" for easy integration

  • Compatible with SeaMAX Software Suite – for Windows & Linux

  • Supports Spring-Clamp Terminal Blocks (optional)

  • Includes Metal Standoffs – sturdy internal mounting setup

Parameter Details
Model Number 8115-KT
Relay Type 4 x SPDT Form C Relays
Switching Capacity 6A @ 250VAC / 5A @ 60VDC
Wiring Configuration NO or NC; Discrete Common per Relay
Interface USB (Internal, 2mm 4-pin Molex Header)
USB Specification USB 1.1 Compliant; USB 2.0 Compatible
Power Requirement +5V @ 500mA (USB Bus-Powered)
Operating Temperature 0°C to +70°C (Extended: -40°C to +85°C Optional)
Storage Temperature -50°C to +105°C
Humidity 10–90% RH, Non-Condensing
Dimensions 2.9" (L) x 2.5" (W) x 1.1" (H); 1.6" incl. standoffs
Mounting Format Porthole (3.2" x 3.1" Standard Footprint)
Software Compatibility SeaMAX API (Windows 7/Vista/XP/2000, Linux)