iRTU – The Best Controller for Your SCADA

Why use a com­mon PLC, when you can have a mod­u­lar RTU made for sub­sta­tion environments?
  • Secured, adapt­able and mod­u­lar Remote Tele­con­trol Units suit­able for all envi­ron­ments and pow­er dis­tri­b­u­tion systems
  • Advanced func­tion­al­i­ties such as load shed­ding, microsec­ond time­stamp­ing, PRP redun­dan­cy or PLC automa­tion with IEC 61131–3   
  • Full range of pro­to­cols (DNP3.0, IEC 61850, IEC 60870–5… ) to com­mu­ni­cate with all devices and con­trol cen­ters con­nect­ed to your elec­tri­cal network.
  • Embed­ded Eth­er­net switch with (2) 10/100 BaseTx, (2) FX100 fiber optics and RSTP/ PRP/ HSR redun­dan­cy
  • Up to 4 Eth­er­net ports, 4 ser­i­al ports, and option­al, inter­nal 4G, 3G and GPRS modems

Our secure and scal­able RTUs can simul­ta­ne­ous­ly han­dle old­er (e.g. Mod­bus) and new­er (e.g. IEC 61850) pro­to­cols on ser­i­al, wire­less and Eth­er­net net­works — mak­ing sub­sta­tion automa­tion less com­plex and more affordable.

Remote tele­con­trol units (RTUs) for SCADAs are fre­quent­ly employed as bay con­trollers for data acqui­si­tion in sub­sta­tions, often requir­ing fur­ther devices for gate­way and more advanced func­tion­al­i­ties like load shed­ding or microsec­ond time­stamp­ing. Our mod­u­lar iRTUs are pow­er­ful con­trollers with embed­ded eth­er­net switch­es, state-of-the-art fea­tures and inter­nal I/Os, allow­ing you to do it all with one small device.

They can map ser­i­al servers to IEC 61850 log­i­cal nodes, col­lect and process data from old and new IEDs, report direct­ly to the cotrol cen­ter with any stan­dard pro­to­col (e.g. IEC 60970–5‑104, DNP3) and han­dle all com­mon pro­to­col con­ver­sions: Mod­bus to IEC 61850, IEC 101 to IEC 104, Mod­bus RTU to Mod­bus TCP, Mod­bus to Eth­er­net IP (Ser­i­al to Eth­er­net in gen­er­al), IEC 103 to DNP3 and many more.

A net­work archi­tec­ture based on iRTUs is open and scal­able: you can eas­i­ly inte­grate future gen­er­a­tions of devices (IEDs, sen­sors, routers etc.) and adapt to any present and future needs, such as chang­ing the net­work topol­o­gy or com­mu­ni­ca­tion media.

Applications & Functions

iRTU Communications

  • Up to 4 ser­i­al ports
  • Option­al inter­nal 3g, 4g and GPRS modems
  • Mul­ti­ple I/O card con­fig­u­ra­tions with up to 48 DI, 16 DO (relay out­puts) and 16 ana­log inputs
  • Embed­ded Eth­er­net switch (option­al) with 3 addi­tion­al Eth­er­net ports 
    • Up to 4 Eth­er­net ports per unit
    • (2) 100BASETx + (2) FX100 fiber optics ports with PRP, HSR and RSTP redun­dan­cy

Substation Automation

  • Sub­sta­tion RTU
  • Bay Con­troller Unit
  • Sub­sta­tion PLC
  • Sub­sta­tion Gateway
  • Feed­er Remote Ter­mi­nal Unit (FRTU/ FDCU)

Generation Plant Monitoring & Control

  • PV Plant Gateway
  • Smart Meter Gateway
  • Pro­to­col Converter
  • Load Curve Col­lec­tion & Transfer


Features & Functionalities


Full real-time sub­sta­tion equip­ment monitoring


Full IEC 61850 GOOSE & MMS integration


Inter­nal PLC based on IEC 61131–3


Inte­grat­ed I/O in many configurations


Full range of protocols


Alarms & events generation


High-accu­ra­cy time syn­chro­niza­tion via PTP & NTP, plus inter­nal RTC


PRP & HSR red­Box (redun­dan­cy box)


Live, remote and web based con­fig­u­ra­tion & data access


Local data stor­age freely expand­able with inte­grat­ed SD card


Full plant & sub­sta­tion equip­ment monitoring


DLMS meter data col­lec­tion, man­age­ment, con­ver­sion and transfer


Col­lec­tion of all kinds of elec­tri­cal data from var­i­ous meters at once

iRTU as Bay Control Unit

Exam­ple schema

Technical Features

Communication Ports

The iRTU comes with 2 inde­pen­dent 10/100 BaseTX Eth­er­net ports (two dif­fer­ent MAC address­es, RJ45 con­nec­tor) and an inter­nal Eth­er­net switch with (2) 10/100BaseTX, (2) fiber optic FX100 sen­sors with ST, SC o SFP con­nec­tors, and RSTP /PRP /HSR redundancy.

Addi­tion­al­ly, the iRTU car­ries 4 soft­ware con­fig­urable ser­i­al ports: 1 full RS-232/RS-485/RS-422 + 2 basic RS-232/RS-485/RS-422 and 1 RS-422/RS-485 port (EXP422) to con­nect iRTUe mod­els. Option­al­ly, one of the ser­i­al ports can be replaced with an inter­nal 4G(LTE), 3G and GPRS modem.

Time Management

The iRTU man­ages a broad range of time syn­chro­niza­tion meth­ods with fault tol­er­ant pri­or­i­ty schemes (NTP, IEEE1588/ PTP, IEC60870‑5–101, DNP 3.0) to ensure that your net­work is syn­chro­nized and you can retrace any net­work failures.

The time stamp accu­ra­cy of the iRTU is supe­ri­or to one 1ms and has a 1 microsec­ond res­o­lu­tion. In case the time serv­er fails, the iRTU can rely on its high accu­ra­cy real time clock (1.5ppm) as a back­up. 

IEC61131‑3 PLC Automation

Thanks to its inter­nal PLC based on IEC 61131–3, the iRTU 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 iRTU has a high exe­cu­tion speed – a 2000 ST line pro­gram takes less than 3ms.

Standards and Compliance

The diverse back­grounds of our part­ners and clients from all over the world have helped us gath­er state-of-the-art know-how and first­hand expe­ri­ence in a great vari­ety of ener­gy appli­ca­tions. This joined knowl­edge is the foun­da­tion of our opti­mized iRTU/GW fam­i­ly, which has a proven track record of being par­tic­u­lar­ly effec­tive and resis­tant for a diverse range of appli­ca­tions and harsh envi­ron­ments belong­ing to the ener­gy industry.

As a result, the iRTU meets the require­ments of exten­sive stan­dards, such as IEC61850‑3, IEC60870‑2–1 & IEC60255-26.

Protocols & IP Networking

The iRTU was designed to use a high num­ber of pro­to­cols (see data sheet) and com­mu­ni­cate with sev­er­al con­trol cen­ters at once. It is equipped with trans­par­ent TCP bridg­ing and con­fig­urable IP rout­ing to tun­nel any ser­i­al pro­to­col (such as Mod­bus) over a TCP/IP con­nec­tion and facil­i­tate the con­trol of com­plex IP networks.

The iRTU IEC 61850 capa­bil­i­ties have been A lev­el cer­ti­fied by DNV-KEMA. 

Inputs and Outputs

iRTUs are equipped with inter­nal I/O mod­ules for direct data acqui­si­tion and fea­ture a 2.5kV iso­la­tion. The DIs can be cho­sen in 4 volt­age lev­els (or cus­tomized) and grant a 1 ms time­stamp accu­ra­cy. Each input can also be defined as a counter and pro­vide indi­vid­u­al­ly con­fig­urable debounce and declut­ter­ing fil­ters. Its AIs have a cur­rent range of ±20 mA (oth­er volt­ages and cur­rents upon request) and a 0.15% accuracy.

The iRTU also offers inter­nal dry con­tact electro­mechan­i­cal relay out­puts in sev­er­al rat­ings and with an iso­la­tion of 6 kV.

Models Overview

iRTU B0 Series

(4) Soft­ware con­fig­urable ser­i­al ports with LEDs:
(1) Full RS-232/ RS-422/ RS-485 ser­i­al port
(2) Basic RS-232/ RS-422/ RS-485 ser­i­al ports
(1) RS-422/ RS-485 ser­i­al port (EXP-422 port*)
(2) 10/100BaseTX Eth­er­net ports (RJ45 con­nec­tor)
(1) USB port to con­nect periph­er­al devices
(1) MGMT port (MiniUSB con­nec­tor) for local maintenance

iRTU S Series 

The S Series car­ries the B0 ports and an embed­ded Eth­er­net switch (con­nect­ed to one of the two inde­pen­dent Eth­er­net ports), which provides:

S0 – (3) 10/100BaseTX RJ con­nec­tors
(2) FX100 ports with HSR/PRP redun­dan­cy and SC, ST or SFP connectors

S3 – (2) 10/100BaseTX RJ con­nec­tors and (2) FX100  ports with RSTP redun­dan­cy and SC, ST or SFP connectors

M Series

The M series replaces one of the ser­i­al ports with an inter­nal modem: M0 (GPRS), M1 (3G + GPRS) and M2 (4G/LTE + GPRS)


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: 173 x 78.4 x 137 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 up to 4 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 4GBytes 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).

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.

iGW-VM – For Unlimited Scalability on Any Device

For every­one who wants the the soft­ware func­tion­al­i­ties of the iGW, but has a preferred hard­ware or is look­ing for high scal­a­bil­i­ty with exist­ing devices, there is the iGW-VM. It can run on Lin­ux or Win­dows servers and pro­vides unique fea­tures and flexibility.

Any questions?

    I have read and accept the Pri­va­cy Pol­i­cy*

    All per­son­al data that you sub­mit us via this form will be processed by Data Con­troller IGRID, S.L. and saved into CONTACTS pro­cess­ing activ­i­tie, with the pur­pose of answer­ing your inquiry, via email or phone, and for a lat­er fol­low up. Pro­cess­ing shall be law­ful because you give us your con­sent for these spe­cif­ic pur­pos­es. Your per­son­al data will not be dis­closed to third par­ties unless forced by law. You have right to access to, rec­ti­fy, or delete your per­son­al data, and oth­er rights as explained in our Pri­va­cy Policy

    Common iRTU Applications

    Sub­sta­tion Automation

    Gen­er­a­tion Control

    Sub­sta­tion Data Acqui­si­tion and Control

    Elec­tric­i­ty Dis­tri­b­u­tion Networks

    Field/ Pole-mount RTU

    Feed­er RTU (FRTU)

    PV Plant Mon­i­tor­ing and Control

    Wind Park Mon­i­tor­ing and Control

    Hydro­elec­tric Pow­er Plant Control

    Sub­sta­tion Gateway

    MV Grid Con­trol Center

    Gen­er­a­tion Dispatch

    Data Acqui­si­tion Gateway

    Rail­way Con­trol Unit

    HV Substation RTU

    In this project, the iRTU-B0C1 reads the meter­ing data from meter­ing IEDs (trans­ferred through an RS485 bus) via Mod­bus RTU and pass­es the data to a local util­i­ty as well as to a local oper­a­tor, who is in charge for the MV section.

    PV Plant Controller

    In this project, the iRTU is used to remote­ly con­trol and super­vise over 100 pho­to­volta­ic gen­er­a­tion plants around Turkey. At each PV plant, one iRTU gath­ers the data with a 1ms time accu­ra­cy from dozens of invert­ers (via Mod­bus­R­TU), meters (via IEC 62056–23), and pro­tec­tions relays (via IEC 61850) and trans­fers the data via IEC60870‑5–104 through GPRS (secured VPN con­nec­tion) to the con­trol cen­ter, where it’s stored on an SQL database.

    HV Substation Automation

    In this project, the iRTUs con­trol meters and pro­tec­tion relays from dif­fer­ent man­u­fac­tur­ers (ABB and Siemens) using com­mu­ni­ca­tion pro­to­cols like Mod­bus and DNP3.0. The data col­lect­ed from the IEDs (meters and pro­tec­tion relays) is sent to the con­trol cen­ters via DNP3.0.

    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.

    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.

    Sub­sta­tion Automa­tion with IEC61850

    HV Sub­sta­tions

    MV Dis­tri­b­u­tion Grids

    Rail­way Automation

    Pro­to­col Conversion

    Smart Meter­ing

    Wind Farm Generation

    Hydro­elec­tric Generation

    Pho­to­voltaics Generation

    Do you need more information?

    We are hap­py to assist you!


    +34 93 502 79 84

    Mon­day to Friday

    08:00h to 17:00h

    Cen­tral Euro­pean Time

      I have read and accept the Pri­va­cy Pol­i­cy*

      All per­son­al data that you sub­mit us via this form will be processed by Data Con­troller IGRID, S.L. and saved into CONTACTS pro­cess­ing activ­i­tie, with the pur­pose of answer­ing your inquiry, via email or phone, and for a lat­er fol­low up. Pro­cess­ing shall be law­ful because you give us your con­sent for these spe­cif­ic pur­pos­es. Your per­son­al data will not be dis­closed to third par­ties unless forced by law. You have right to access to, rec­ti­fy, or delete your per­son­al data, and oth­er rights as explained in our Pri­va­cy Policy