Autonomous Measuring and Switching Device ROSSMA® IIOT-AMS ANALOG Ex Single Channel

ROSSMA IIOT-AMS ANALOG meter-switch is designed for data acquisition from monitoring and measuring instruments with current interface 4…20 mA and/or 4…20 mA+HART and/or resistive interface such as pt1000, Ni1000, TK5000, with subsequent wireless data transmission. It can be used at industrial facilities, housing and communal services infrastructure, and in hard-to-reach locations. The meter-switch enables installation of monitoring instruments in places without power supply and operates in harsh climatic and weather conditions.

Depending on configuration, devices are equipped with a built-in 3.6 V battery with capacity of 14 Ah, or built-in battery packs with 3.6 V voltage and capacity of 126 Ah or 168 Ah. Simultaneously, the meter-switch can be powered from an external DC source with voltage from 3.3 V.

WARNING: Meter-switches are equipped with non-rechargeable lithium-thionyl chloride (LiSOCl2) battery ER34615M/T manufactured by Fanso. Attempts to charge the battery may cause fire!

Battery Life Calculator 🔋

ROSSMA IIOT-AMS ANALOG is equipped with one analog input, or one analog input with HART protocol support, or four analog inputs.

Device Modifications

Single Channel:

• ROSSMA IIOT-AMS ANALOG Single channel
• ROSSMA IIOT-AMS ANALOG Ex Single channel (explosion-proof)
• ROSSMA IIOT-AMS ANALOG Ex Single channel 126 Ah (increased capacity)
• ROSSMA IIOT-AMS ANALOG Ex Single channel 168 Ah (maximum capacity)

Four-Channel (X4):

• ROSSMA IIOT-AMS ANALOG X4
• ROSSMA IIOT-AMS ANALOG X4 PWR (with 220V power)
• ROSSMA IIOT-AMS ANALOG Ex X4 (explosion-proof)
• ROSSMA IIOT-AMS ANALOG Ex X4 168 Ah
• ROSSMA IIOT-AMS ANALOG Ex X4 (DC 3.3V)

Explosion-proof modifications (Ex) have explosion protection marking 1Ex e IIC T4 Gb X and are designed for operation in hazardous areas according to GOST R 31610.0-2014. Protection degree IP66.

Operating Principle

The meter-switch supports two operating modes:

✅ Working with Active Instruments

Operating with monitoring and measuring instruments powered by an external power source.

Figure 1. Connecting active control and measuring instruments to ROSSMA IIOT-AMS ANALOG X1

✅ Working with Passive Instruments

Operating with monitoring and measuring instruments powered by the meter-switch's built-in battery.

Figure 2. Connecting passive control and measuring instruments to ROSSMA IIOT-AMS ANALOG X1

Operating Algorithm:

• Data is read from the monitoring instrument with a configurable period starting from 30 seconds. Data is stored in meter-switch memory and transmitted during scheduled wireless sessions at set intervals.
• Data transmission period can be configured from 30 seconds. By default, manufacturer sets data transmission interval to once every 15 minutes. Data transmission is performed by a timer set in the meter-switch's internal memory.
• Meter-switch communication timing management is performed via network server and can be adjusted by command.

Technical Specifications

General characteristics:

• Connection interface: 4-20 mA current loop or resistive pt1000, Ni1000, TK5000; HART.
• Operating temperature range t,°C: -55…+85
• Built-in temperature sensor: yes (sent with every connection)
• Antenna type: internal
• Built-in battery charge measurement: yes (sent with every connection)
• Mounting: directly to sensor, with cable ties to support, on DIN rail, wall-mounted

LoRaWAN Technical Specifications:

• Device class in LoRaWAN network: A
• Activation in LoRaWAN network: OTAA/ABP (configurable), ABP – default
• Transmitter output power: up to 100 mW (configurable), default 25 mW
• Sensitivity: -138 dBm
• Radio communication range: up to 5 km in urban areas; up to 15 km in rural areas.
• Frequency plan: EU-868/RU-868 (configurable)

NB-IoT Technical Specifications:

• Exchange speed: 25/20 kbps (single-tone) or 60 kbps (multi-tone) (DL/UL)
• Radio frequency bands: B1/2/3/5/8/12/13/17/18/19/20/25/26/28/66/70

Structurally, the meter-switch consists of components:

• controller;
• transmitter;
• boost converter;
• voltage divider;
• logic switches;
• power supply.

Functional Capabilities

ROSSMA IIOT-AMS ANALOG supports autonomous operation and wireless data transmission for the following sensor types:

• Optical sensors
• Position sensors (distance)
• Gas flow sensors
• Temperature sensors
• Current sensors
• Angle sensors (encoders)
• Ultrasonic sensors
• Liquid level sensors
• Force sensors
• Acceleration sensors (accelerometers)
• Liquid flow detectors
• Humidity sensors
• Gas sensors
• Non-contact sensors
• Motion sensors
• Tilt sensors
• Load cells
• Pressure sensors
• Photointerrupters
• Photoelectric sensors
• Magnetic field sensors (Hall sensors)

Installation

Installation Instructions

IMPORTANT: To ensure proper functioning, installation and configuration of the meter-switch must be performed by qualified personnel.

1. Remove top covers from ROSSMA switch and pressure sensor.
2. IMPORTANT! Disconnect board power supply. Remove connector Pos 3 from mating part Pos 2 Fig.5.
3. Prepare required length of KSPV 2×0.5 cable (about 10 cm.)
4. Strip cable on both sides (about 5 mm).
5. Connect cable to ROSSMA switch at connector fig. 3. Pos 4. according to diagram Fig 4.
6. Pass cable through switch cable gland (Fig 3. Pos 1.)
7. Connect cable to pressure sensor according to diagram Fig 4.
8. Tighten cable glands with required wrenches.
9. Close pressure sensor top cover.
10. Connect power connector fig 5. Pos 3. To mating part Fig 5.pos 2.
11. Install top cover on ROSSMA switch (Fig 1. Pos 1,2,3,4)

Explosion-proof version: When installing in hazardous areas, follow PUE chapter 7.3 "Electrical installations in hazardous areas" and GOST 31610.7-2012.

Interface Connection

Fig.3 - Connector Description:

1. Cable gland for pressure sensor connection
2. Cable gland for additional antenna installation
3. Communication module (NB IoT, optional - LoRa)
4. Equipment/instruments connection connector (pressure sensors)
5. Battery bracket mounting screw
6. Programming connector
7. "RESET" button
8. "Measure and send" button
9. Battery

LED Indication

• "Status" LED blinks periodically – data transmission to server in progress.
• "Error" LED blinks once per second – communication module not detected or faulty.
• "Error" LED blinks in sequence three times – pause – three times – ROSSMA switch cannot register in network and obtain IP address.
• "Error" LED blinks in sequence five times – pause – five times – network server data transmission error.

Battery Replacement

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

When is battery replacement needed?

Approximate battery life up to 10 years with data transmission once per day. Battery capacity of 14 Ah is designed for sending 40,000 data packets ± 10%.

If meter-switch malfunction is detected, check battery voltage. Device transmits voltage data with every connection.

Replacement Instructions

1. Turn off meter-switch (disconnect battery connector from board connector)
2. Unscrew screw securing bracket inside housing
3. Remove battery and bracket from housing
4. Install new battery in housing
5. Install bracket on battery and secure with screw
6. Connect battery to power connector on board
7. Check LED indication

CRITICAL: Use only non-rechargeable lithium-thionyl chloride (LiSOCl2) battery ER34615M/T manufactured by FANSO. Otherwise, manufacturer does not guarantee proper operation!

Battery technical parameters:

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

Firmware

Main Firmware (SM-UNI)

Version: 0.2.5 (19.12.2024) — ⬇️ Download

What's new in v0.2.5:

• Added communication interval query command (0x06 on port 3)
• Added HART sensor polling control (on/off)
• Added HART sensor polling control commands

LoRaWAN Communication Module Firmware

Version: 0.5.0 (19.12.2024) — ⬇️ Download

What's new in v0.5.0:

• Changed main board notification packet format
• Improved data sending module to main board

LR-HRT11 Firmware (Single Channel LoRaWAN)

Version: 1.6.0 (02.09.2024) — ⬇️ Download

What's new in v1.6.0:

• New build system
• Added LR-HRT11-V45Metran board support
• Added new version request format

For Metran/Yokogawa: ⬇️ Download lr-hrt11-metran-v1.6.0.hex

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

Configuration and programming go to