iRTUcompact – Feeder & Renewable Plant RTU
Perfect for Feeder RTU (FRTU) & renewables applications, providing I/O and gateway capabilities in a compact device.- Smart and compact all-in-one RTUs (remote telecontrol units) specially suitable for renewable plants and distribution feeder automation.
- Can provide all communication capabilities required for the control of Photovoltaic plants
- Offers multiple communication options incl. embedded Ethernet switches, built-in 4G/3G/GPRS modems, internal I/Os and multiple serial ports to communicate with any device through any protocol common in the industry.
The iRTUcompact is an all-in-one device with integrated I/O and numerous communication ports to collect data from any protection relay or switchgear controller, making it the ideal solution for MV and generation applications, specifically Feeder RTU (FRTU) and PV projects.
Our secure and scalable RTUs are equipped with an advanced communication core to manage, convert and transfer multiple protocols on serial, wireless and Ethernet networks at once. They are also capable of providing all required networking, redundancy and time synchonization functions, allowing to automate substations with fewer equipment, in a less complex and more affordable way.
The data collection from meters, protection relays, and other IEDs can be performed using any protocol, inlcuding IEC 60870–5, IEC 61850 (MMS/GOOSE), DNP3, DLMS, Modbus or Procome, with a microsecond timestamp resolution via NTP or PTP.
An architecture based on the iRTUcompact is open, efficient and scalable, as it allows to integrate coming generations of devices (IEDs, sensors, routers etc.) and adapt to any kind of network changes, saving you lots of time and money. With its integrated digital and analog I/Os, it can autonomosly report a high number of data points from several devices to upstream masters and control centers.
Applications & Functions

Feeder & MV Distribution Automation
- Field/ Pole-mount RTU
- Feeder Remote Terminal Unit (FRTU/ FDCU)
- Substation Gateway
- Events Logger
Full real-time substation equipment monitoring
Alarms & events generation
Record all parameters of all incoming and outgoing feeders
Live remote and web based configuration & data access

PV Plant Controller
- PV Plant Gateway
- Smart Meter Gateway
- Substation Gateway
- Protocol Converter
- Load Curve Collector
Full plant & substation equipment monitoring
Collection of all kinds of electrical data
Live remote and web based unit access
Alarms & events generation
IRTUcompact as Meter or Protection Master Device
Example schema

Technical Features
Communication Capabilities
Despite its small size, the iRTUcompact B model comes with 2 independent 10/100 BaseTX Ethernet ports (two different MAC addresses, RJ45 connector) and 3 Serial ports, one selectable by software between RS422/RS485/RS232 and two between RS422/RS485 while the S model provides three additional Ethernet ports by replacing one of the conventional interfaces with a switch.
The devices also carry 2 USB ports for configurations and other purposes. Optionally, one of the serial ports can be replaced with an internal 4G(LTE), 3G and GPRS modem.
IEC 61850 MMS
The iRTUcompact can be used as a simple link between serially connected physical devices and logical IEC 61850 devices, as it can map any signal from many kinds of data models and structures onto IEC 61850 logical nodes, whilst also providing IEEE1588 / PTP time synchronization.
Thanks to its full iGrid protocol stack, it can convert any standard or legacy protocol such as IEC 60870–5‑103, SPAbus, Modbus, DLMS to IEC61850, allowing it to communicate with hundreds of vendors.
IEC61131‑3 PLC Automation
Thanks to its internal PLC based on IEC 61131–3, the iRTUcompact can provide powerful automation and control functionalities. For example, you can easily reuse programs on different projects, run multiple PLC instances simultaneously or use triggered variables for control commands and set points. It also allows to run hot program updates, stop PLC executions depending on the quality of selected PLC inputs and debug PLCs online, either cycle-by-cycle or step-by-step.
The iRTUcompact has a high execution speed – a 2000 ST line program takes less than 3ms.
Communication Protocols
The iRTUcompact was designed to use a high number of protocols and communicate with several control centers at once.
The stack includes newer protocols such as IEC 61850 MMS or GOOSE (A‑level certified by DNV-KEMA), but also older standard and proprietary protocols e.g. ModbusRTU/TCP, Profibus, SpaBus, Mlink or Procome. Other supported downstream protocols for meters and protection relays are IEC 60870–5‑102/-103, IEC 62056–21 and DLMS, while upstream protocols for control centers also include IEC 60870–5‑101/-104 or DNP3.0 serial/TCP.
Digital & Analog In-/Outputs
The iRTUcompact provides 24 digital inputs (available in 4 voltage levels) with 2.5kVrms isolation and a 1 ms timestamp accuracy as well as 4 high accuracy (0.15%) analog inputs (+/-20mA), two of which can be replaced with 2 PT100 temperature sensors. Each input can be defined as input or counter and provide a configurable debounce filter.
On the output side, it provides 8 dry contact electro-mechanical relay outputs with an isolation of 6kV.
Cyber Security
iGrid enforces several layers of security measures guided by the propositions of the IEC 62351 standard to protect its devices from all kinds of threats.
The iRTUcompact is a hardened device featuring Role Based Access Control (RBAC) to avoid intrinsic risks such as security holes and unauthorized actions by authenticated users.
In addition to encryptions via TSL/SSL, HTTPS, SSH and VPN support (i.e. OpenVPN), its communication can also be secured with network control methods such as firewalls, IP filters, ACL or TCP port blocks.
Models Overview
iRTUcompact‑B#01
• Two Ethernet 10/100BaseTX interfaces with RJ45 connector and independent MAC address
• Three serial ports, selectable by software between RS422/RS485/RS232.
iRTUcompact‑S#31
• Two different Ethernet interfaces with independent MAC address
• ETH1 : 10/100BaseTX with RJ45
• ETH0 : with (2) 10/100BaseTX with RJ45 and (2) FX100 with RSTP redundancy
• Three serial ports, selectable by software between RS422/RS485/RS232.
I/O Configuration
K1 : 24 Digital Inputs, 8 relays and 4 DC analog inputs (+/-20mA and +-/10Vdc)
K2 : 24 Digital Inputs and 8 relays
K3 : 24 Digital Inputs, 8 relays, 2 DC analog inputs (+/-20mA and +-/10Vdc) and 2 PT100 temperature sensors
Specifications
General Characteristics
Power supply W : wide range, 32 — 250Vdc / 80 — 250Vac (2.5kVrms isolation) 24 : 19.5–60Vdc (2.5kVrms isolation) |
MTBF 177,000h (one hundred seventy seven thousand hours) |
Environmental Operating temperature: ‑25ºC to +70ºC — IEC 60068–2‑1, IEC 60068–2‑2, IEC 60068–2‑3, IEC 60068–2‑14, IEC 60068–2‑30, IEC 60068–2‑38 |
Vibration & shock test IEC 60068–2‑6, IEC 60068–2‑7 |
Physical External dimensions: 120 x 240 x 50 mm (HxWxD) IP30 enclosure with DIN Rail mounting |
iGComms Software
Redundancy deployable on a hot-standby configuration, optional redundant power supply |
Security IEC 62351–3 and IEC 62351–5 support, including TLS/SSL, SSH and VPN connections |
IEC61131‑3 automation logic and PLC programming, with LD, FBD, ST and SFC editor |
LUA language can be used to create simple and complex logic and mathematical expressions |
EMC Standards
IEC 60950–1, IEC 60255–5:2000, IEC 60255–22:2000, EN 55022, IEC 61000–6‑4, IEC 61000–6‑5, IEC 61000–4‑2, IEC 61000–4‑3, IEC 61000–4‑4, IEC 61000–4‑5, IEC 61000–4‑6, IEC 61000–4‑8, IEC 61000–4‑9, IEC 61000–4‑10, IEC 61000–4‑12, IEC 61000–4‑16, IEC 61000–4‑17, IEC 61000–4‑18, IEC 61000–4‑29 |
Protocol Stack
Master/Slave IEC 60870–5‑101 |
Master IEC 60870–5‑102 |
Master IEC 60870–5‑103 |
Master/Slave IEC 60870–5‑104 |
Master/Slave DNP3.0 (serial, UDP, TCP) |
Master/Slave ModbusRTU |
Master Profibus DP Master/Slave |
Modbus TCP/UDP and JBUS (master) |
Master IEC 62056–21 |
Master DLMS |
Master Spabus, Mlink, Procome |
SNMP Agent/Manager |
IEC 61850 MMS Client/Server |
IEC 61850 GOOSE Publisher/Subscriber |
Communication Ports & CPU
Serial 3 software configurable ports with RS232/RS485/RS422 |
Ethernet (2) 10/100BaseTX ports with independent MAC addresses |
Wireless full internal 4G(LTE), 3G and GPRS modem (optional) |
Ethernet switch (S series) up to (4) 10/100BaseTX ports with RJ45 connection and (2) FX100 with ST, SC connectors or SFP interface, and supporting RSTP, HSR and PRP configurations |
CPU ARM Cortex-A7 @ 528MHz, with 128 MB Flash and 256MBytes RAM. |
Configuration with iConf
iConf has been specifically developed for electrical applications, saving you lots of time and money throughout the control system set-up and maintenance tasks, whilst also minimizing your project risks. Upload and download your configurations, import or scan SCL files (61850) and create your own templates.
Configuration & Maintenance
Easy configuration with iConf tool |
Internal web server, allowing real time monitoring of the system and all its internal parameters |
Command console with full information on packet exchanges, with all available protocols |
Local or remote maintenance via USB or Ethernet port |
RTC & Time Synchronization
Real-time Clock (RTC) with 1.5 ppm drift and microsecond resolution timestamp |
Server NTP, IEC 60870–5‑101, IEC 60870–5‑104, DNP3.0, PTP |
Client IEEE1588(PTP), SNTP, IEC 60870–5‑101, IEC 60870–5‑102, IEC 60870–5‑103, IEC 60870–5‑104 DNP3.0, DLMS, Spabus, Mlink, Procome and Profibus DP |
Meet the Family




iGW – For More Complex Projects
The iGW is a powerful and reliable substation gateway, able to run either in standalone or redundant modes, carrying 4 serial ports and an (optional) embedded Ethernet switch for 2 additional Ethernet ports (total of 4).

iRTU – The Gateway with Integrated I/Os
The iRTU is an intelligent and scalable bay controller with internal and configurable I/O capabilities for direct data acquisition, powerful protocol conversion (incl. IEC 61850), high-precision timestamping and an optional embedded Ethernet switch.

iGWlite – The “Lite” Gateway
The iGWlite comes with 1 Ethernet, 1 RS485/RS422 and an optional RS-232 port (copper or fiber) or a 2G/3G/4G modem – taking little space on a DIN-Rail, but still employing the full iGrid protocol suite.
iGrid Protocol Suite

iRTU & iGW Family References

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iRTUe – Remote I/O Extensions
iGWs, iRTUs and third party master units can be freely extended by connecting one or several iRTUe.
They are IEC 61850 (GOOSE) compliant and come in many configurations such as 48 DI, 16 relays, 16 AI, 24 DI + 8 relays, 24 DI + 8 AI or 8 relays + 8 AI.
iGW-VM – unlimited control
The freely scalable iGW-VM supports all architectures using Windows or Linux, acting as a substation gateway, bay controller, RTU or communication front-end for SCADA systems. The iGW-VM is thus the perfect software choice for projects with a predetermined/preferred hardware or a large grid to cover (high number of datapoints).

iControl SCADA
High-performance SCADA for the visualization and control of substation data. It is able to run either in client/server or standalone modes, providing advanced functionalities such as hot-standby redundancy, automatic line coloring, events notification (via e‑mail and sms), SQL logging, and reports generation.
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