Autonomous Measuring and Switching Device ROSSMA® IIOT-AMS Dry Contact VPM (Valve Position Monitor)

ROSSMA IIOT-AMS Dry contact VPM meter-switch is an autonomous device equipped with sensitive elements designed for monitoring the state and position of wedge and mechanical valves, with wireless data transmission.

Current data is transmitted wirelessly at a set interval (once per day by default), and also instantly when the input state changes. Read values are stored in the meter-switch memory and transmitted during scheduled communication sessions with the LoRaWAN network at the configured interval.

Capabilities

• Valve state monitoring
• Operation from built-in battery
• Wireless data transmission via LoRaWAN/NB-IoT
• Instant transmission on state change
• Built-in temperature sensor
• Autonomous operation up to 10 years

Technical Specifications

• Power type: 14 A/h; 126 A/h; 168 A/h; DC 3.3V
• Communication interval/14 A/h battery discharge time: 1 min./90 days, 2 min./180 days, 10 min./300 days, 1 hour/3 years 150 days
• Operating temperature range: -55…+85°C
• Built-in temperature sensor: yes (sent with every connection)
• Antenna type: internal
• Supply voltage: built-in 3.6 V battery, capacity 14 A/h, form factor: D
• Built-in battery charge measurement: yes (sent with every connection)
• Housing dimensions, mm: 80×75×55
• Mounting: cable ties and mounting ears

Battery Life Calculator 🔋

LED Indication

The meter-switch has indicators ACT (trigger), Lora (sending/receiving data via LoRaWAN network). The meter-switch has a RESET button – device reset, pressing which causes device reboot.

First Start

ATTENTION! Calibration is mandatory for proper device operation. Without calibration, VPM cannot correctly determine valve position.

Connecting the meter-switch to power must be done in the following order:

1. Mount the meter-switch on the valve according to mounting type
2. Unscrew screws (4 pcs) securing cover to housing base
3. Remove cover
4. Set valve to extreme position by turning wheel fully right or left until it stops

IMPORTANT! Before powering on, ensure the valve is in extreme position (fully open or fully closed).

5. Turn on battery power
6. Enable "Calibration" mode by installing jumper on contacts. When calibration mode is enabled, ACT indicator will light up
7. Perform full open/close cycle of the valve, returning it to initial position (position before installing jumper)
8. Disable "Calibration" mode by removing jumper from contacts
9. Check indication:
   • One long indication - calibration successful ✅
   • Ten short indications + two long indications - number of valve open-close rotations does not match
   • Ten short indications + three long indications - no rotation was performed

On calibration error: Repeat procedure from step 4. Ensure valve completes full open/close cycle.

10. Close cover

TIP: Do not close cover until successful calibration! This allows quick procedure repetition if necessary.

Configuration and programming go to