TWSN modules


  • 6 programmable pulse counter inputs
  • Compatible with ES interface for electricity fiscal meters
  • Acquisition of active and reactive energy pulses (2 + 2 inputs for absorbed / generated energy)
  • Tariff range acquisition (2 inputs)
  • 1 SSR output AC/DC 40V 100mA
  • Programmable radio transmission time
  • Router function integrated
  • 230 Vac mains powered
  • External radio antenna

TWSN-ES is a 230 Vac powered device that acquires pulses from electricity, gas and water meters. This device can be used as a generic pulse counter (up to 6 pulse inputs). In addition, as it is powered continuously, it can work also as a repeater for peripheral TWSN sensors.

For what concerns the electricity meter application, TWSN-ES acquires active and reactive energy pulses (absorbed and generated) and tariff range.

It is possible to program the pulse counter transmission intervals.

For further information, please download our technical data sheet (DOWNLOAD AREA, left sidebar)

General digital inputs

  • 6 digital inputs insulated by dry contact

Digital inputs connected with ES module

  • VMax: ≤ 27V
  • IMax: ≤ 27mA (Rseries ≤ 1 ohm)
  • Ipulse: ≥ 10mA
  • Minimum pulse duration: 30 ms
  • Reference standard: IEC 62053-31

User interface

  • Button to associate / disassociate the node
  • 7 segments led digit to view TWSN join status and radio link level with other radio sensors

Radio module specification

  • Band: ISM 2.4GHz
  • RF Data rate: 250 Kbps
  • Reception sensitivity: -102 dBm
  • Max transmission power: 10 mW (+10 dBm)
  • Esternal antenna
  • Indoor/Outdoor coverage: 50m/100m
  • Standard: IEEE 802.15.4-2003; Stack ZigBee 2007 PRO (EMBER Znet)
  • Network Security: ZigBee-2007 standard security requirements; 128 bit AES encryption algorithm

Power Supply

  • Supply: 230 Vac, 50/60Hz, 20mA

Environmental and mechanical parameters

  • Operative temperature: -10°C .. +60°C
  • Storage temperature: -20°C .. +70°C
  • Protection degree: IP50
  • Size: 145×90 mm

Product standards applied

  • ETSI EN 300 328: radio compatibility for digital transmissions
  • ETSI EN 301 489: radio compatibility
  • EN 61000-6-2/3: EMC Emissions/Immunity
  • EN 60950-1: EMC electrical safety

For further information, please download our technical data sheet (DOWNLOAD AREA, left sidebar)