Solid-state I/O relays
Interface relays for PLC and control-system outputs, designed for stable switching thresholds and long service life in continuous-duty applications.
1A Affiliated ManufacturerFinland · Est. 1982
Delcon
High-reliability solid-state interface relays for demanding automation.
A Finnish manufacturer of solid-state I/O relays built with proprietary pulse-transformer isolation for process plants, cranes, energy, marine, and other electrically noisy industrial environments.
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✳ The Manufacturer
About.
Delcon Oy designs and manufactures solid-state interface relays in Nummela, Finland. Since 1982, the company has focused on relays that keep working where conventional contactors and optocoupler modules often fail: inductive loads, long cable runs, and plants with heavy electrical interference.
Delcon's pulse-transformer technology provides galvanic isolation without mechanical wear. The portfolio includes standard I/O relays, hazardous-area models with HazLoc and ATEX approvals, and pin-compatible options for common panel standards. Production runs under ISO 9001:2015 with a 10-year product warranty.
✳ Product Range
What they make.
Pulse-transformer isolation
Proprietary isolation technology that separates control and load circuits while maintaining strong noise immunity on long cables and inductive loads.
Hazardous-area models
HazLoc and ATEX approved relays for installations where certified equipment is required in classified or explosive atmospheres.
Mounting bases & panel integration
Relay modules and bases for control-panel builders, machine OEMs, and system integrators who need compact, dependable switching in tight enclosures.
✳ Featured Products
Featured products.
DELCON's own top picks for common industrial use lead this selection, followed by hazardous-location relays and PLC-integration accessories.
SLO24TR
A 24 V DC input solid-state output relay for switching AC loads in industrial control systems. A strong general-purpose DELCON pick for PLC-driven automation where reliable AC load switching is required.
- Nominal input 24 V DC
- Nominal load 240 V AC at 3 A
- Pulse-transformer galvanic isolation
SLO24CRA5
A 24 V DC input solid-state relay designed for demanding DC loads and higher DC voltages, positioned for applications where a low-current control output must switch industrial DC equipment reliably.
- 24 V DC input, 300 V DC load at 5 A
- For inductive loads and high DC voltages
- MTTF 137 years per DELCON
SLI230CR
An industrial signal relay for converting a 240 V AC field signal to a 24 V DC control-side output. DELCON positions the SLI230CR for stable signal handling in electrically noisy industrial environments.
- 240 V AC input, 24 V DC output at 50 mA
- N/O solid-state contact
- Immune against noise per DELCON
EX Series
DELCON's EX Series extends its solid-state relay architecture into hazardous-location applications, with input and output variants for classified areas requiring approved equipment.
- ATEX, IECEx, and cULus HazLoc approvals on the EXI120CH
- Non-sparking (type nA) design for Zone 2 and Division 2 areas
- Input and output relay versions
PLC Fast Connect Interfaces
PLC adapters, relay mounting bases, and cable harnesses that simplify control-panel wiring between PLC hardware and DELCON relay systems. Useful for OEM machine builders, panel builders, and automation projects.
- PLC Fast Connect adapters including DSTD110A/150A and ET200 SP HA
- MBS16BIOP 16-relay mounting base
- RC10 and RC20 connection cable families
✳ Through 1A
U.S. channel.
1A Industrial Group is building the U.S. commercial channel for Delcon, connecting the manufacturer with automation distributors, panel builders, machine OEMs, and integrators who need Finnish solid-state relays with a dedicated American partner.
We handle market development, relationship building, and distribution strategy so Delcon can expand in the United States with a clear local point of contact.