Elseta - Model Mini RTU Series - Utility and Distribution Grid Automation

The Mini RTU series devices are made to fulfill Utilities and distribution grid needs in automation. Additionally, this product line is commonly used as control and monitoring equipment for renewable energy sources (solar, wind, and hydro). Due to its modularity and variety of selectable modules and functions, this series can be implemented for different applications from simple protocol conversion with only the WCC Lite to complex tele-control applications with implemented algorithms, mobile connectivity, and fault passage indicator functions.

The Mini RTU series devices have advanced RTU functions with additional unique functionality such as data logger capabilities to collect internal measurements and events, data as time-series data, and the ability to securely transfer information into the Premise or Cloud-based monitoring systems. The Mini RTU series supports networking functions (switch, VPN server/client, rules-based firewall, RESTful API) that allow for easy implementation of networking tasks on the RTU itself without any additional equipment and improve Cyber security.

• Versatile communications including most energy protocols;
• Expandable with I/O modules and modules not limited in RACK;
• Simple engineering with the integrated web interface and free configuration tools;
• The small form factor allows it to fit into retrofit projects;
• Mechanical design for DIN-rail mounting;
• Wide operating temperature range -40°C … 85°C;
• Easy remote parametrization via the internet and VPN;
• Integrated programmable user programs;
• Integrated I/O intelligence independently behaves without interaction with the main CPU;
• Rich Cyber security features:
  • BDEW white paper conformity;
  • IPsec and IKE encryption
  • IPsec and OpenVPN VPN client;
  • Role-based access control (RBAC) for power system management;
  • Radius support for remote user rights management;
  • SSL (TLS) encryption for IEC 60870-5-104 and IEC 61850;
  • HTTP’s protocol;
  • Firmware signature;
  • Security Syslog;
  • Rules-based Firewall;

Device data: Description
Article number: Mini RTU series
Product Description: – 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).
Configuration software: WCC Excel utility, Putty, Web browser
Warranty: 2 years
General: Main RTU features
Functionality: Mini RTU series supports the collection of data up to 50 sub-devices, e.g. IEDs, meters, IO’s, and Inverters. Each sub-device connected to the mini RTU is supervised by RTU and shown status on the diagnostic screen.
RTU functionality: Mini RTU series supports the collection of data up to 50 sub-devices, e.g. IEDs, meters, IO’s, and Inverters. Each sub-device connected to the mini RTU is supervised by the RTU and shown status on the diagnostic screen.
Data exchange: Freely scalable RTU with included all supported protocols and functions for utilities, grid, and renewables automation solutions.
Data collection: Mini RTU series support:
– distributed PLC-based IEC 61499 standard;
– Script execution engine (recommended) to write own programs based on LUA programming language.
PLC: 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.
Data storage: RTU provides an archive of all data on non-volatile flash for events, measurements, counter values, and security events.
Time management: Local user administration with different access levels
Central user administration via RADIUS
Time sync sources: mini RTU series 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 precision: The time base operates with a time resolution of 1 ms.
Communication interfaces: Interfaces for communication with IEDs, Meters, inverters, SCADA systems and 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: Available only with integrated WCCLite version with mobile communication module
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 receiving/sending the packet.
Supported protocols: Host and sub-device communication protocols
IEC 60870: Mini RTU is able to 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.
DNP3: IEC 60870-5-101 Master support
IEC 60870-5-101 Slave support
IEC 60870-5-103 Master support (WCCLite only)
IEC 60870-5-103 Slave support (IOMOD modules only)
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
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
Input/Output modules: 
IOMOD 8DI4RO: 8x digital inputs and 4x relay outputs (NO) module
Digital inputs: 8
Input voltage: 12-48VDC
Input signal polarity: Yes, configurable
Input inversion: Yes, configurable
Input grouping: up to 4 groups of DPI
Relay outputs: 4 (normally open contact)
Output current: <10 A (per output)
Output voltage: 60VDC, 250VAC
Output functions: Permanent or Pulse output
Output pulse: Configurable in ms (0..60s)
Output feedback time: Configurable in ms (0..60s)
Output grouping: up to 2 groups DCO
IOMOD 8DI8DO: 8x digital inputs and 8x digital outputs (transistor) module
Digital inputs: 8
Input voltage: 12-24 VDC
Input signal polarity: Yes, configurable
Input inversion: Yes, configurable
Input grouping: up to 4 groups of DPI
Digital outputs: 8 (open collector)
Output current: <500mA (per output)
Output voltage: 12..24VDC
Output functions: Permanent or Pulse output
Output pulse: Configurable in ms (0..60s)
Output feedback time: Configurable in ms (0..60s)
Output grouping: up to 4 groups DCO
IOMOD 16DI: 16x digital inputs module
Digital inputs: 16
Input voltage: 12-24 VDC
Input signal polarity: Yes, configurable
Input inversion: Yes, configurable
Input filter: Yes, configurable (0..256000ms)
Input counter: 16 (one per input) with a reset function
IOMOD 8AI: 8x analog inputs module
Analog inputs: 8 configurable analog inputs
Inputs resolution: 16 bit
Channel-independent programmable input types: Voltage and current inputs
Voltage input ranges: Bipolar: +-10.24V, +-5.12V, +-2.56V
Unipolar: 10.24V, 5.12V
Current input ranges: Bipolar: +-51.2mA, +-25.6mA, +-12.8mA
Unipolar: 51.2mA, 25.6mA
Overvoltage protection: +-20V
IOMOD 4RTD: 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
Analog inputs: 4 RTD (PT100 / PT1000)
Input supports sensors: PT100 and PT1000 temperature RTD sensor
Input connection: 2, 3, or 4 wires connection
Temperature measurement range: -200 to 800 °C using platinum RTD sensors
Accuracy: 0.5°C accuracy for all operating conditions
IOMOD 4Cs4Vs: 4xCurrent 4xVoltage sensors module
Analog inputs: 8x 16-bit resolution (Channel-independent)
Current inputs: 4
Current inputs measurement range: 225 mV (IEC 60044-8)
Current input impedance: 1 MΩ; < 170 pF
Voltage inputs: 4
Voltage inputs measurement range: 3.25 V/√3 AC (IEC 60044-7)
Voltage inputs impedance: 1 MΩ; < 170 pF
Accuracy: 1% (for all channels)
Frequency measurement range: 45..65 Hz
Overvoltage protection: ±20V
IOMOD Meter: 3xCurrent 3xVoltage sensors module
Analog inputs: 6x 16-bit resolution (Channel-independent)
Current inputs: 3
Current inputs measurement range: 225 mV (IEC 60044-8)
Current input impedance: 1 MΩ; < 170 pF
Voltage inputs: 3
Voltage inputs measurement range: 3.25 V/√3 AC (IEC 60044-7)
Voltage inputs impedance: 1 MΩ; < 170 pF
Accuracy: 1% (for all channels)
Frequency measurement range: 45..65 Hz
Overvoltage protection: ±20V

Power supply: 
Auxiliary power supply: 9-33VDC (full range)
Insulation voltage: 3 kV

Operating conditions: 
Operating temperature: -40°C … 75°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: WCCLite – 119 x 22.5 x 101 mm
IOMOD* – 119 x 17.5 x 101 mm
* – IOMOD 8DI4RO has dimensions similar to WCCLite.