SLDC Data Connectivity
Reliable RTU and gateway links that stream real-time telemetry from substations and generators to State Load Despatch Centre SCADA/EMS over IEC 60870-5-104.
SCADA · RTU · Protocol Gateways
Connect every asset on the grid with protocol-certified automation
Firstcall Automation builds SCADA systems, RTUs and gateways that speak IEC 60870-5-101/103/104, IEC 61850, DNP3 and DLMS/COSEM — engineered for SLDCs, substations, solar and wind plants, and smart grids.
Engineered for the power sector
State Load Despatch Centres
Transmission & Distribution Utilities
Renewable IPPs
EPC Contractors
Smart Grid Programmes
What we do
Automation projects across the entire grid
From data connectivity at the load despatch centre to field automation at the feeder, we deliver turnkey SCADA and protocol engineering.
Windmill SCADA
Wind farm monitoring and control — turbine status, met-mast data, WTG curtailment and grid-code compliance aggregated into a single operator view.
Solar SCADA
PV plant SCADA with inverter, SMB, weather-station and PPC integration, active/reactive power control and automatic generation reporting.
Substation SCADA-SAS
IEC 61850 substation automation systems — bay controllers, station HMI, interlocking, disturbance recording and gateway to control-centre SCADA.
SMART Grid Automation
Feeder automation, FLISR, RMU and auto-reclosers, distribution transformer monitoring and DMS integration for self-healing networks.
SMART Grid GIS Automation
Network model and asset data synchronised with GIS — spatially accurate single-line diagrams, outage mapping and as-built feedback from the field.
SAS Automation
Retrofit and greenfield Substation Automation System delivery — protection integration, time sync, redundancy and factory/site acceptance testing.
Have a different scope?
We take on custom SCADA and protocol integration projects.
See all projects
Products
RTUs and gateways, certified on every protocol you run
Our remote terminal units and SCADA gateway are built on a common hardware platform with hot-swap I/O, dual power and cyber-hardened firmware — then loaded with the protocol stack your project needs.
- RTU's — IEC 104, IEC 101, IEC 103, IEC 61850, DNP3 and DLMS/COSEM variants
- Gateways — the SCADA Gateway for any-to-any protocol conversion and data concentration
- Wide-temperature, conformal-coated boards for substation and outdoor kiosks
- Full operating manuals and configuration tools available on the Download page
Product line
IEC 104 RTUEthernet
IEC 101 RTURS-232/485
IEC 103 RTUProtection bus
IEC 61850 RTUMMS / GOOSE
DNP3 RTUL1/L2/L3
DLMS/COSEM RTUMeter DCU
SCADA GatewayAny-to-any
6+RTU protocol stacks
7Grid automation domains
100%IEC / IEEE compliant
24×7Site & remote support
Training & consultation
Build protocol expertise in your own team
Instructor-led courses and consultation delivered by engineers who commission these systems every week.
SCADA Training
Architecture, RTU configuration, HMI/EMS operation, redundancy and troubleshooting.
Protocol Training
Hands-on IEC 60870-5, IEC 61850, DNP3 and DLMS/COSEM with live analysers.
Protocol Consultation
Interoperability audits, ICD/CID reviews, point-list design and FAT/SAT support.
Custom-made Protocols
Bespoke protocol drivers and converters for legacy IEDs and proprietary devices.
Download
Operating manuals & datasheets
Every RTU and gateway ships with a complete operating manual. Grab the latest revision from the Download centre.
IEC 104 RTU — Operating ManualPDF · Rev. current
IEC 61850 RTU — Operating ManualPDF · Rev. current
DNP3 RTU — Operating ManualPDF · Rev. current
SCADA Gateway — Operating ManualPDF · Rev. current
FAQ
Common questions
Each RTU variant ships with a dedicated stack — IEC 60870-5-104, IEC 60870-5-101, IEC 60870-5-103, IEC 61850 (MMS & GOOSE), DNP3, or DLMS/COSEM. The SCADA Gateway runs several simultaneously for protocol conversion. Modbus RTU/TCP is available on every model as a field-side driver.
Yes. Our Substation SCADA-SAS and SAS Automation practice specialises in retrofits — mapping legacy IED protocols to a unified IEC 61850 station bus and a single gateway uplink to your control centre.
Use the Contact form with your point count, protocols and site details, or email 
.
.Ready to scope your automation project?
Send us your protocols, point list and timeline — we'll come back with an architecture and budgetary quote.