Overview

A remote terminal unit (RTU) is a microprocessor-based industrial device that monitors field equipment, transmits telemetry data to supervisory systems, and executes remote commands for control and automation. Also known as a remote telemetry unit, RTUs are essential components of modern automation systems like SCADA (Supervisory Control and Data Acquisition) and Distributed Control Systems (DCS), providing reliable data exchange and control in widely distributed environments.

WCC Lite enhances this traditional role by combining advanced communication, data handling, automation logic, networking, and protocol converter capabilities into a compact, standalone device. Designed for flexible deployments without vendor-specific power supplies or auxiliary hardware, WCC Lite supports diverse applications from retrofit projects to new automation installations, acting as a mini RTU with robust functionality.

WCC Lite’s integrated protocol converter functionality allows seamless interoperability between field devices and centralized platforms — simplifying integration and reducing the need for additional gateways or hardware. With additional DI/DO capabilities, it also reports local events such as power outages or cabinet access errors to the central SCADA system.

By integrating multiple capabilities into one device, including communication protocol converter features, WCC Lite delivers functions expected from a modern RTU in a user-friendly form factor, ideal for utilities and industrial automation alike.

RTU I/O’s calculator

WCC Lite applications

WCC Lite can be deployed in a wide range of use cases where field data collection, remote monitoring, protocol converter, and control are required:

Power grid infrastructure
Renewable energy projects (solar, wind, hydro)
Energy storage systems
Factory resources supervision
Energy sub-metering applications
Secondary substations and distribution automation

In all scenarios, WCC Lite functions as a compact remote telemetry unit to collect and deliver data from field devices to SCADA, DMS, or cloud-based platforms such as CloudIndustries.eu, improving operational insight. Its protocol converter capabilities ensure compatibility with mixed system architectures and heterogeneous devices.

Integrated WCC Lite protocols

WCC Lite supports an extensive set of industrial communication standards, enabling seamless interoperability with multiple devices and systems:

DNP3 master/slave (Serial / TCP)
IEC 61850 (client/server)
Modbus master/slave (RTU / ASCII / TCP)
M-Bus master (Serial / TCP)
IEC 60870-5 (101 / 103 / 104)
IEC 62056-21 / IEC 62056-31
Transparent TCP-to-Serial tunneling
Compatibility with a broad range of PV inverters and smart devices

This broad protocol support, positions the WCC Lite as a flexible gateway protocol converter in mixed-technology environments, reducing integration complexity while expanding the range of interoperable field equipment. These capabilities help bridge legacy and modern systems without requiring dedicated protocol translation hardware.

Key Features

Versatile Protocol Handling and Conversion

• Built-in protocol converter functions support translation between multiple communication standards.
• Local event storage and high-reliability buffering for robust data handling.

Data Logging and Event Reporting

• Supports local data storage in common file formats (CSV, JSON).
• Secure push to remote services via HTTP(s) and FTP(s).
• Timestamped event logs for diagnostics and compliance.

Industrial-Grade Networking and Security

• Integrated router and firewall capabilities with advanced rule sets for traffic control, SNAT/DNAT, and packet marking.
• VPN support (IPsec and OpenVPN) ensures secure remote access and data transmission.
• Role-based access control and secure authentication mechanisms safeguard critical system functions.

Flexible Connectivity

• 4G/3G/2G dual SIM modem with automatic switching provides reliable mobile connectivity.
• Ethernet interfaces support high-bandwidth applications, including remote access to IEDs and video streams.

Integrated Automation Capabilities

• Built-in scripting and logic engine provide local processing and customizable automation.
• Supports event-based logic execution for autonomous operations at the edge.

Compact and Efficient Design

• Small footprint suited for retrofit installations and space-constrained cabinets.
• Low power consumption and rugged construction ensure reliable operations in industrial environments.

RTU Functionality

WCC Lite’s architecture is engineered to support full remote terminal unit functionality:

Acquisition of analog and digital data from sub-devices
Execution of control commands to the field equipment
Communications with control systems and cloud platforms
Real-time monitoring of device status
Local logic execution and customizable automation functions

The device’s integrated protocol converter features make it especially effective in applications where multiple protocol standards coexist, improving interoperability without additional equipment.

Why WCC Lite Excels

Modern RTUs — including WCC Lite — are no longer simple telemetry endpoints. They combine communication, security, data processing, and communication protocol converter capabilities in one compact platform, enabling operators to:

Reduce deployment time and integration complexity
Improve reliability and uptime of distributed monitoring systems
Simplify system maintenance and remote troubleshooting
Support scalable architectures in evolving grid and industrial landscapes

WCC Lite’s multi-role capability — as a remote terminal device, remote telemetry unit, and integrated gateway protocol converter — makes it a powerful solution for modern automation challenges.

Link to older version: WCC Lite V1.4

Specifications

	Device data	Description
	Article number	WCCLite V1.5
	Product Description	WCCLite – mini RTU and gateway
	Configuration software	WCC Excel utility, Putty, Web browser
	Warranty	2 years
	General	WCCLite features
	Functionality	Freely scalable RTU with included all supported protocols and functions for utilities, grid and renewables automation solutions.
	RTU functionality	– Reading Process events from the input/output modules. – Send commands to the output modules. – Communication with sub-devices to collect events and execute commands. – Communicating with control systems and other IOT systems. – Handling the configuration via WEB Browser and Elseta configuration tools; – Monitor communication status with sub-devices. – Sequence-of-Event (SOE). – Execute user scripts to enable custom automation and regulation algorithms. – Connectivity: LAN/WAN, Mobile (4G LTE), VPN. – Firewall (rules-based).
	Data exchange	WCCLite can support up to 16 host systems including hot-standby SCADA systems. Every IEC 60870-5 protocol can have shared or independent buffers of events and support multiple SCADA communications at the same time.
	Data collection	WCCLite series supports the collection of data from up to 50 sub-devices, e.g. IEDs, meters, IO’s, and Inverters. Each sub-device connected to WCCLite is supervised and shown status on the diagnostic screen.
	PLC	WCCLite support: – distributed PLC-based IEC 61499 standard; – Script execution engine (recommended) to write own programs based on LUA programming language.
	Data storage	WCCLite provides an archive of all data on non-volatile flash for events, measurements, counter values, and security events.
	Time management	WCCLite provides a multilevel time management solution CPU supports NTP, IEC 60870, and DNP3 time sync multi-sourcing and IOMOD devices have a time sync option with IEC 60870 protocol firmware.
	Time sync sources	Multi-time sync options (priority based): – Internal RTC clock with battery-based memory up to >15 years of lifetime; – NTP (Network Time Protocol) over TCP/IP; – IEC 60870-5 time sync support; – DNP3 time sync support; – IEC 61850 time sync support.
	Time sync precision	The time base operates with a time resolution of 1 ms.
	Communication interfaces	Interfaces for communication with IEDs, Meters, inverters, SCADA systems etc.
	Independent Ethernet ports	2x 10/100 Mbps 10/100Base-T compliance IEEE 802.3, IEEE 802.3u standards, supports auto MDI/MDIX
	Serial ports	2x RS485 (Standard ANSI/TIA/EIA-485-A)
	Serial ports	1x RS232 (Standard EIA/TIA-232-E) Switchable with RS485 port1
	Mobile communication	Only with WCC Lite with 4G/3G/2G modem
	Mobile technology support	4G (LTE) – Cat 4 up to 150 Mbps, 3G – Up to 42 Mbps, 2G – Up to 236.8 kbps
	Dual SIM card support	2 SIM cards, auto-switch cases: weak signal, data limit, no network, network denied, data connection fail
	Other mobile info	Signal strength (RSSI), SINR, RSRP, RSRQ, RSCP, IMSI, ICCID, Signal strength LED indicators, SMS receive/send, APN management.
	LED indication	To indicate traffic on the interface every interface has an independent LED indication on the receive/send packet.
	Supported protocols	Host and sub-device communication protocols
	IEC 60870	IEC 60870-5-101 Master support IEC 60870-5-101 Slave support IEC 60870-5-103 Master support IEC 60870-5-104 Master support IEC 60870-5-104 Slave support (KEMA Cert.) + IEC 62351 (parts -3) security standard is supported by TLS encryption
	DNP3	DNP3.0 TCP(LAN/WAN) Master support DNP3.0 TCP(LAN/WAN) Slave support DNP3.0 Serial Master support DNP3.0 Serial Slave support IEC 62351 (parts 3) security standard is supported by TLS encryption
	Modbus	Modbus RTU Master support Modbus RTU Slave support Modbus ASCII Master support Modbus ASCII Slave support Modbus TCP Master support Modbus TCP Slave support
	IEC 61850-8-1	Client (Master) support of Editions 1, 2, 2.1 – MMS client – Read services – Write services – Static data sets – Report Control blocks – Controls – Discovery Server (Slave) support of Editions 1, 2, 2.1 – MMS server – Read services – Write services – Static data sets – Report Control blocks – Controls – Discovery IEC 62351 (parts -3, -4, -5, and -6) security standard is supported for authentication and TLS encryption
	Meter protocols	M-bus Master support DLMS/COSEM master support IEC 62056-21 master support IEC 62056-31 master support
	Other protocols	MQTT, RESTful API
	Cyber security	Comply with BDEW white paper, IEC 62351, and general cyber security practices
	Secure access	Secure access to all services (HTTPS, SSH)
	RBAC	Role-based access protection with login and password IEC 62351 by security standards is supported.
	User administration	Local user’s administration with different access levels Central user administration via RADIUS
	Password complexity	Fully customizable password policy: – minimum password length, – maximum password lifetime, – usage of lowercase characters, – upper case characters, – numeric, – special characters.
	Certificate storage	Internal Crypto Store for certificate management Import of certificates
	Power supply
	Auxiliary power supply	9-33VDC (full range)
	Insulation voltage	3 kV
	Operating conditions
	Operating temperature	-40°C … 85°C
	Storage temperature	-40°C … 85°C
	Relative humidity	max. 95 % (non condensing)
	Protection class	IP20
	Dimensions
	Installation type	DIN Rail mounting
	Case height x width x depth	119 x 22.5 x 101 mm
	Standarts	IEC 62368-1:2020/A11:2020 EN 61000-4-2:2009 EN 61000-4-3:2021 EN 61000-4-4:2013 EN 61000-4-5:2014+A1:2018 EN 61000-4-6:2024 EN 61000-4-8:2010 EN 61000-6-4:2020
	Changelog 1.4->1.5	Integrated PCB Wi-Fi Antenna. Added RS-485 Failsafe Biasing to ensure reliable communication with older devices. Improved Surge Protection.