Autonomous Measuring and Switching Device ROSSMA® IIOT-AMS Pulse

ROSSMA IIOT-AMS PULSE meter-switch is designed for independent counting of pulses (including frequency signals above 300 Hz) from instrumentation devices and wireless transmission of the collected data.

The meter-switch can be used at industrial facilities, housing and communal services infrastructure, and in hard-to-reach places. Operates in harsh climatic and weather conditions.

ATTENTION: The meter-switch is equipped with a built-in non-rechargeable lithium-thionyl chloride (LiSOCL2) battery ER34615M/T. Attempts to recharge the battery may lead to fire!

ROSSMA IIOT-AMS PULSE operates from the built-in power supply, allowing equipment installation in hard-to-reach places.

Device Capabilities

Main Features:

• Up to 8 inputs (4 galvanically isolated + 4 dry contact inputs, selectable configuration)
• Operation with frequency signals above 300 Hz
• Enclosure protection degree not lower than IP56
• Explosion-proof version (Ex)
• Autonomous operation up to 10 years

Russian Ministry of Industry and Trade Registry: Equipment is registered in the registry of the Ministry of Industry and Trade of the Russian Federation as equipment manufactured on the territory of the Russian Federation (Conclusion 48859/11 dated 11.06.2021).

Application Areas

ROSSMA IIOT-AMS PULSE is designed for operation with the following equipment types:

Meters:

• Liquid meters
• Gas meters
• Pulse electricity meters

Flow Meters:

• Liquid and gas flow meters
• Mass flow meters

Explosion-proof modification (Ex) has explosion protection marking 1Ex e IIC T4 Gb X, where X indicates special conditions: operating temperature range -55°C...+80°C. Enclosure protection degree IP66.

Explosion Protection

The explosion-proof meter-switch is designed for installation and operation in hazardous areas of indoor and outdoor installations according to Chapter 7.3 "Electrical Installations in Hazardous Areas" of the Electrical Installation Rules.

Devices with explosion protection type "increased protection type 'e'" comply with:

• GOST 31610.0-2014 "Explosive Atmospheres. Part 0. Equipment. General Requirements"
• GOST 31610.7-2012 "Electrical Equipment for Explosive Gas Atmospheres. Part 7. Equipment. Increased Protection Type 'e'"

Designed for operation in hazardous areas where explosive mixtures of gases and vapors with air of categories IIA, IIB, IIC according to GOST R 31610.0-2014 may form.

Operating Principle

The meter-switch counts pulses from instrumentation devices:

Input Types:

• 4 galvanically isolated inputs - for connecting meters with pulse output
• 4 dry contact inputs - for connecting sensors with relay output
• Selectable input configuration when ordering

Technical Capabilities:

• Support for frequency signals above 300 Hz
• Independent pulse counting without external power
• Periodic transmission of accumulated data over wireless network

Operating Algorithm:

• Pulse count data accumulates in device memory
• Communication period is configured via LoRaWAN network
• Transmission of accumulated data occurs according to set timer
• Communication timing control is performed via network server

Technical Specifications

General Characteristics:

• Number of inputs: up to 8 (4 galvanically isolated + 4 dry contact)
• Connection interface: pulse (frequency) input, dry contact
• Maximum input signal frequency: above 300 Hz
• Operating temperature range t,°C: -55...+80
• Built-in temperature sensor: yes (sent with each communication session)
• Built-in battery voltage measurement: yes (sent with each communication session)
• Antenna type: internal

LoRaWAN Technical Characteristics:

• LoRaWAN device class: A or C
• LoRaWAN network activation: ABP or OTAA (configurable), ABP by default
• Communication period: configurable via LoRaWAN network
• Transmitter output power: up to 100 mW (configurable), 25 mW by default
• Sensitivity: -138 dBm
• Radio communication range: up to 5 km in urban areas; up to 15 km in rural areas
• Frequency plan: RU868, EU868, IN865, AS923, AU915, KR920, US915, KZ865, custom (based on EU868)

Power Supply:

• Power type: Built-in battery 3.6 V
• Built-in battery capacity: 14,000 mAh
• Battery type: ER34615M/T (Fanso)
• Chemistry: LiSOCl₂ (lithium-thionyl chloride)
• Battery life: up to 10 years

Enclosure:

• Enclosure dimensions (general industrial version): 82×80×55 mm
• Enclosure dimensions (explosion-proof version): 80×75×55 mm
• Enclosure protection degree (general industrial): IP 65
• Enclosure protection degree (explosion-proof): IP 66
• Mounting: mounting plate with DIN-rail adapter (optional)

Construction

The meter-switch consists of a plastic enclosure with cable glands (the required number of glands is specified when ordering), housing a printed circuit board with a 3.6V lithium battery.

Construction Elements:

• Plastic enclosure
• Cable glands (quantity depends on modification)
• Printed circuit board with components
• 3.6V lithium battery
• Silicone seal
• Stainless steel screws (captive)
• Mounting plate with DIN-rail adapter (optional)

The manufacturer reserves the right to make changes to product designs without degrading structural and functional characteristics.

Indication and Control

Indicators:

• ACT (Activity) – receiving data from terminal equipment
• LoRa – sending/receiving data over LoRaWAN network

Buttons:

• RESET – device reset. When pressed, the meter-switch will transmit current data over the LoRaWAN network.

Functional Capabilities

ROSSMA IIOT-AMS PULSE is designed for operation with the following instrument types:

Resource Meters:

• Liquid meters (water, petroleum products, etc.)
• Gas meters (natural gas, compressed air, etc.)
• Pulse electricity meters
• Heat meters with pulse output

Flow Meters and Instruments:

• Liquid flow meters
• Gas flow meters
• Mass flow meters
• Ultrasonic flow meters
• Turbine flow meters

Sensors and Equipment:

• Frequency sensors (>300 Hz)
• Encoders
• Speed and rotation sensors
• Tachometers
• Any devices with pulse or relay output

Main Advantages:

• Up to 8 independent inputs (4 galvanically isolated + 4 dry contact)
• Pulse counting above 300 Hz
• Autonomous operation up to 10 years
• Explosion-proof version (Ex)
• Operating range -55...+80°C
• Enclosure protection degree IP56/IP66

Installation

IMPORTANT: Installation and configuration of the meter-switch must be performed by qualified personnel.

Installation Requirements:

When selecting the installation location for the meter-switch, consider the following conditions:

• The meter-switch version must match the installation zone
• Exposure of the enclosure and internal circuit board elements to aggressive environments is not allowed

Explosion-proof version: When installing in hazardous areas, follow Chapter 7.3 "Electrical Installations in Hazardous Areas" of the Electrical Installation Rules and GOST 31610.7-2012.

Initial Setup

Connection Procedure:

1. Mount the meter-switch according to the mounting type
2. Unscrew the screws (4 pcs) securing the cover to the enclosure base
3. Remove the cover
4. Connect the meter-switch using cable (recommended conductor cross-section not exceeding 1 mm) to the terminal device through terminals (according to Fig.1)
5. Connect the battery to the power connector on the circuit board
6. Check LED indication
7. Secure the cover to the enclosure base using screws

LoRaWAN Network Activation:

The meter-switch supports two LoRaWAN network activation methods:

• ABP (Activation By Personalization)
• OTAA (Over-The-Air Activation)

By default, the manufacturer sets the ABP activation method.

Battery Replacement

ATTENTION: Battery replacement must be performed by qualified personnel. Repair and maintenance of the meter-switch by the consumer is not allowed!

When is battery replacement needed?

Battery life is approximately 10 years. The device transmits battery voltage data with each communication session.

If malfunction is detected, check the battery voltage via the ROSSMA NETS server.

Battery Technical Parameters:

• Type: ER34615M/T (Fanso)
• Voltage: 3.6 V
• Capacity: 14,000 mAh
• Form factor: D
• Chemistry: LiSOCl₂ (lithium-thionyl chloride)

CRITICAL: Only use non-rechargeable lithium-thionyl chloride (LiSOCL2) battery ER34615M/T manufactured by FANSO. Otherwise, the manufacturer does not guarantee proper operation!

Firmware

Main Firmware (LR-IMPx6)

Version: 2.0 (19.12.2024) — ⬇️ Download

What's new in v2.0:

• Full EEPROM support: frequency plan settings, communication interval
• New pulse input library (similar to LR-485)
• Fixed counter reset bug
• Time support (software timer with 20 sec discretization)
• Option to send time in current data packet
• Device statistics stored in FRAM:
  • Current data packets count
  • Total packets count
  • Incoming packets count
  • Retransmission count
  • Restart count and total operating time

Firmware for Autonomous Use (no pull)

Version: 2.0-no-pull (19.12.2024) — ⬇️ Download

Features:

• Reduced power consumption when inputs are closed
• Optimized for autonomous operation
• Recommended for battery-powered devices

How to update: Use ST-LINK programmer for flashing via SWD interface.

Configuration and Programming go to

Download User Manual (PDF) 📥

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