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Secure SIR321 Countdown Timer


New product

Z-Wave timer used to control heating appliances and panels

  • Easy installation
  • Associates with existing Z-Wave devices
  • Operates in 30, 60 or 120 minute intervals
  • Operate in Z-Wave mode in 1 minute intervals
  • Flush or surface mounting

More details

42,33 € tax incl.

49,80 € tax incl.

35,28 € tax excl.
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More info

The Z-Wave Secure Wall Switch is designed to control heating and electrical appliances. It can be operated by pressing the BOOST button in either 30 minute, 60 minute or 120 minute intervals and the connected appliance will switch off at the end of the interval.

The Secure Wall Switch can also operate in Z-Wave mode by running the timer in 1 minute intervals up to 24 hours for more precise heating. An optional Secure Temperature Probe is also available to provide even more accurate temperature readings to your Z-Wave controller.

Can be used for:

  • Panel heaters
  • Heated towel rails
  • Oil-filled radiators
  • Boiler extension timer
  • Underfloor heating temperature measurement (with optional Secure Temperature Probe)

Technical Details


  • Purpose of control: Electronic timer (independently mounted)
  • Contact rating: 13A resistive (optionally 3A inductive) 230V AC, suitable for loads up to 3kW
  • Control type: Micro-disconnection
  • Supply: 230V AC, 50Hz only
  • Control action: Type 2B
  • Operation time: limitation Intermittent
  • Software class: Class A
  • Timing accuracy: (±5%)
  • Timer boost period: Model SIR 321 - 30/60/120 minute, 1 minute to 24 hours via Z-Wave
  • Sensor temp. accuracy: ±0.5°C from 0°C to 65°C and ±1°C from 66°C to 100°C (optional external probe for SIR 321)
  • Sensor temp. range: 0°C to 100°C (optional external probe for SIR 321)


  • Dimensions: 85 x 85 x 19 mm (flush mount), 85 x 85 x 44 mm (surface mount)
  • Case material: Thermoplastic, flame retardant
  • Ball pressure test temperature: 75°C
  • Mounting: Single-gang surface mount / flush box, minimum depth 25 mm (UK) / 35 mm (Continental Europe)


  • Impulse voltage rating: Cat II 2500V
  • Enclosure protection: IP 30
  • Pollution degree: Degree 2
  • Operating temperature range: 0°C to 35°C


  • Design standards EN 60730-2-7, RoHS, R&TTE
  • ETSI EN 300 220-2
  • ETSI EN 301 489-3
Data sheet
Z-Wave technologyZ-Wave (Gen 3) 868.42 MHz
IoT - Internet of ThingsWireless communication
Neutral wireRequired
Power SupplyCable Power
Heating ControlHeating and hot water combined 1-channel
Type of useIndoor
IP RatingIP30
Control of electrical circuits1 Circuit
Switching AC voltage 230VYes
Compatibility with HOMEYNo
FIBARO HC2 CompatibilityYes
FIBARO HC LITE CompatibilityYes
VERA PLUS CompatibilityYes
VERA EDGE CompatibilityYes
ZIPABOX CompatibilityYes
RAZBERRY CompatibilityYes
POPP CompatibilityYes
PIPER CompatibilityNot Tested
Compatibility with O2 Smart BoxNo
Notes to compatibilityManually setting time

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