Industrial IoT Gateway

Buy an Industrial IoT (IIoT) Edge Gateway with Modbus TCP/IP for SCADA & PLC Integration

If you want to buy an industrial IoT gateway that turns existing sensors and equipment into usable Industrial Internet of Things (IIoT) data, the Sollae SIG industrial IoT gateways are a practical “edge gateway” choice. They speak Modbus TCP (aka Modbus TCP/IP), so you can connect directly to SCADA, HMI panels, PLCs, PCs, and mobile apps without reinventing the stack.

Why teams buy Sollae SIG industrial IoT gateways

Native Modbus TCP gateway endpoints for fast integration (SCADA/HMI/PLC friendly).
Industrial-grade operating range across the lineup (built for real plant environments).
Secure networking options (SSL/TLS support across the series).
Multiple client connections so more than one system can read data at once (e.g., SCADA + maintenance app).
Purpose-built I/O options: analog (0–5V / 4–20mA), digital input (with counters), relay outputs (NO/NC + pulse), PT100 temperature, and an all-in-one model.

Industrial Internet of Things (IIoT): What These Modbus TCP Gateways Are Used For

In practice, an industrial iot deployment usually starts with one goal: stop “manual checks” and make field signals visible and controllable. A Sollae SIG device acts like an Ethernet Modbus endpoint that exposes I/O and sensor values as registers, so your software can read and act on them.

Industrial iot solutions for remote equipment status (run/stop, fault, limit switches)
IoT technology for energy & utilities (meters, pumps, valves, building subsystems)
Production support: counter-based monitoring (pulses, cycles, usage tracking)
Process visibility: analog sensors (pressure/level/flow transmitters via 4–20mA)
Remote actions: relay output control (on/off, pulse, interlocks handled upstream in PLC/SCADA)
Temperature monitoring: PT100 in cold-chain, storage, process lines

Commercial reality: Most clients choose SIG gateways because they reduce site visits, shorten commissioning time and integrate cleanly into existing Modbus TCP projects.

Modbus TCP Gateway Integration: SCADA/HMI/PLC + Modbus RTU to TCP Bridge

The SIG series is ideal when your edge signals need to be available as Modbus TCP registers over IP. If your legacy devices still speak protocol Modbus RTU (RS232/RS485), add a Modbus gateway to bridge Modbus RTU TCP (or Modbus RTU to TCP gateway) into the same network. This is a clean way to unify industrial iot industry sites where old and new equipment must coexist.

Buying tip:

If you need Modbus RTU TCP conversion (RS485/RS232), start with a modbus gateway model.
If you need sensor signals + control over IP, choose an industrial iot gateway (SIG series) below.

Compare Industrial IoT Gateway Types (Modbus TCP/IP I/O) Before You Order

Type / Model	What it connects	Best for (transactional fit)
Analog Input Industrial IoT Gateway SIG-5430 (4AI)	0–5V, 4–20mA, 0–20mA sensors → Modbus TCP over Ethernet	Buy when you need “analog to Ethernet Modbus” for transmitters (pressure/level/flow) and trending in SCADA
Digital Input Industrial IoT Gateway (with counters) SIG-5440 (4DI)	Dry/Wet contact + NPN/PNP inputs (counting supported) → Modbus TCP	Buy for status monitoring + pulse counting (meters, cycles, runtime events) in iiot dashboards
Digital Output Industrial IoT Gateway (relay control) SIG-5450 (2DO)	Relay outputs (NO/NC) + pulse mode → controlled via Modbus TCP	Buy for remote switching, rebooting, timed pulses, and basic control from SCADA/HMI
Temperature Edge Gateway (PT100) SIG-5560 (PT100)	PT100 (3-wire) temperature → Modbus TCP/IP over Ethernet	Buy for cold-chain, process temperature, alarms and maintenance-trigger thresholds
All-in-One Industrial IoT Gateway (edge gateway) SIG-5600 (4AI/4DI/4DO)	Mixed sensors + relays → Modbus TCP via Ethernet (and Wi-Fi via USB dongle)	Buy when you want one industrial gateway to cover monitoring + control across multiple signal types

Why Sollae Industrial IoT Gateways Win vs Generic Modbus TCP I/O Modules

Many competitors sell “Ethernet I/O modules” or “remote I/O controllers” that technically speak Modbus, but buying teams often hit friction: limited security options, single-client constraints, or poor handling of industrial edge needs (counters/pulses, rugged temp range, predictable integration). Sollae focuses on repeatable industrial deployments.

Industrial-first design: made for control cabinets, plant floors, and distributed sites (not hobby IoT).
Modbus TCP/IP done right: clean integration into SCADA/HMI/PLC stacks where gateway modbus tcp compatibility matters.
Useful edge functions: counter inputs (SIG-5440/5600) and pulse outputs (SIG-5450/5600) for real automation workflows.
Security: SSL/TLS support across the series for modern OT/IT requirements.
Right-sized SKUs: buy only what you need (Analog / DI / DO / Temperature / All-in-One) instead of overpaying for unused I/O.

Quick translation for buyers: SIG gateways are a fast path to industrial iot solutions when you need Modbus TCP data today, and a clear upgrade path tomorrow (add a modbus rtu tcp gateway if you still have RS485 devices).

Who Should Buy Industrial IoT Gateways (IIoT Industrial Internet of Things)

System integrators delivering repeatable “industrial internet things” monitoring/control projects across many sites
OEMs & machine builders who want to ship equipment with industrial internet of things iiot readiness
Plant managers & maintenance teams who want fewer site visits and faster fault response
IT/OT teams rolling out secure edge connectivity and standardizing on Modbus TCP gateway integration