Gent S4 SELF TEST Dual Optical Heat Sensor + High Power Red VAD
| Part no. | S4T-711-VAD-HPR |
|---|---|
| Brand | Gent |
| Range | S4 Self Test Detectors |
| Sub-range | Detectors with Voice Sounder & VAD |
Image for illustration; item supplied may differ
At a glance
- Dual optical and heat multi-sensorTwo optical angles help distinguish certain smoke aerosols from dust or steam, alongside heat sensing.
- Functional sensor self-testGenerated aerosol tests both optical channels and the smoke entry path; warming the thermistor tests heat response.
- High Power red VADCeiling-mounted red VAD with High, Medium and Low Power settings; no sounder or voice messages.
- Loop power and isolationThe S4T range operates from a 35 to 48 V loop supply and includes short-circuit isolation.
- S4-700 base fitThe head fits an S4-700 base with an S4-705 IP21C plate on a metal back box; one orange dust cover is supplied.
- CLSS testingThe S4T range uses the CLSS app, a gateway and an active Self-Test licence on supported Vigilon Plus and Compact Plus systems.
Description
The Gent S4T-711-VAD-HPR combines dual optical and heat detection with a High Power red VAD and sensor self-test. It reads smoke at two angles and measures heat with a thermistor. The built-in red beacon provides the visual alarm. Self-test uses aerosol to test the optical channels and warms the heat element to check its response. A fan then clears the aerosol through the smoke entry points. This white head fits an S4-700 base with an S4-705 IP21C plate and takes power from the loop. It belongs to the S-Quad Self-Test range for Vigilon Plus and Compact Plus. Testing uses the CLSS app, a gateway and a Self-Test licence.
The S4T-711-VAD-HPR pairs dual optical and heat detection with a High Power red VAD. Two transmitting LEDs and an infrared receiver measure smoke at two angles within one optical chamber. The panel compares the readings as a ratio, helping it distinguish certain smoke aerosols from dust or steam. The extended optical measuring range allows use where dust or steam occurs occasionally. A separate thermistor provides heat sensing.
Read the full technical description
The S4T-711-VAD-HPR pairs dual optical and heat detection with a High Power red VAD. Two transmitting LEDs and an infrared receiver measure smoke at two angles within one optical chamber. The panel compares the readings as a ratio, helping it distinguish certain smoke aerosols from dust or steam. The extended optical measuring range allows use where dust or steam occurs occasionally. A separate thermistor provides heat sensing.
Optical self-test generates paraffin aerosol and moves it into the chamber with a variable-speed fan. Readings from both optical channels are checked. The fan then increases airflow to clear the aerosol through the smoke entry points, with the panel checking the decline in readings and their return to ambient levels. Heat self-test warms the thermistor and checks its thermal response.
The High Power red VAD is ceiling mounted. Its category C coverage is C-3-14 at High Power, C-3-13 at Medium Power and C-3-10 at Low Power, corresponding to 461.8, 398.1 and 235.6 cubic metres. These coverage settings require compliant operation and a two-second flash period; High and Medium Power require an Enhanced Loop Card. Position the combined detector and VAD to meet both detection and visual-warning needs. This model has no sounder or voice messages. Across the S4T range, outputs in the same sector synchronise across the loops of one panel. Synchronisation does not extend across a network of panels.
The head fits an S4-700 base with an S4-705 IP21C plate, mounted on a metal back box. Use screened two-core fire-rated loop cable with conductors from 1.5 to 2.5 mm² and maintain earth continuity. Supplied with one detector head and one orange dust cover. The cover protects the detector during building work and must be removed before commissioning. The S4T range has IP21C housings measuring 117 mm in diameter and 63 mm high, increasing to 70 mm with the standard base.
The S-Quad Self-Test range operates on Vigilon Plus and Compact Plus systems with compatible firmware, SD-card MCC or MCB hardware and a VIGPLUS-LPC-EN loop card. Self-test requires a CLSS gateway for each network domain, the CLSS mobile app and an active Self-Test licence. Run testing with the panel in Service mode. Configure the system with Vigilon Commissioning Tool V1.40 or later, and calculate the loop load and standby requirement with the Battery Standby and Loop Load Calculator.
Specifications
| Sensor technology | Dual optical and heat multi-sensor |
|---|---|
| Alarm output | High Power red VAD |
| Power source | Loop powered |
| Operating voltage (S4T range) | 35 to 48 V |
| Short-circuit isolator | Integral |
| Isolator data (S4T range) | Vmax 48 V; Vnom 40 V; Vmin 35 V; Vso max 16 V; Vso min 8 V; IC max 0.8 A; IS max 1.25 A; IL max 50 µA; Zc max 0.13 ohm |
| Base compatibility | S4-700 with S4-705 IP21C plate |
| Base mounting (S4T range) | Metal back box required |
| Loop cable (S4T range) | Screened two-core fire-rated cable; 1.5 to 2.5 mm² conductors |
| Head dimensions (S4T range) | 117 mm diameter x 63 mm height |
| Height with standard base (S4T range) | 70 mm |
| Body colour | White, RAL 9010 |
| Outer housing (S4T range) | Terluran GP-35 ABS |
| Ingress protection (S4T range) | IP21C |
|---|---|
| Ambient temperature (S4T range) | -10 to +50°C |
| Storage temperature (S4T range) | -20 to +65°C |
| Relative humidity (S4T range) | 95% non-condensing at +5 to +45°C |
| Detection airflow (S4T range) | 0 to 20 m/s |
| Self-test controls (S4T range) | CLSS app, gateway and active Self-Test licence |
| Detection states | 0 (default), 2, 3, 4, 5, 6, 7, 8, 11, 12 |
| VAD flash period | 2 seconds for compliant coverage |
| VAD High Power coverage | C-3-14; 461.8 m³; compliant mode, 2-second flash and Enhanced Loop Card |
| VAD Medium Power coverage | C-3-13; 398.1 m³; compliant mode, 2-second flash and Enhanced Loop Card |
| VAD Low Power coverage | C-3-10; 235.6 m³; compliant mode and 2-second flash |
| VAD maximum current | High 16 mA (560 mW); Medium 11.5 mA (403 mW); Low 6 mA (210 mW) |
Specifications per manufacturer documentation, subject to change. E&OE.
Documents
| Document | Type | Size | Download |
|---|---|---|---|
| Datasheet (805576, S4BK-700, S4T-710, S4T-711, S4T-711-V +8 more) | Datasheet | 546 KB | Download PDF |
| Gent 4188-1130 issue 2 - S-Quad Self-Test (S4T) data and installation | Installation | 6.8 MB | Download PDF |
Optional accessories
- S4-FLUSHS-Quad Semi-Flush Mounting Kit£28.23ex VAT£33.88 inc VATIn stock
- 805580S-Quad Removal Tool Kit£327.18ex VAT£392.62 inc VATIn stock
FAQs
Does the S4T-711-VAD-HPR include a voice sounder?
No. The S4T-711-VAD-HPR combines dual optical and heat detection with a High Power red VAD, but has no sounder or stored voice messages. Its integral beacon gives the visual alarm from the detector head. The S4T-711-V-VAD-HPR is the separate model that adds a voice sounder to dual optical and heat detection with a red VAD. Both sensing types in the S4T-711-VAD-HPR can be functionally self-tested through the licensed CLSS service on a supported system.
How does the S4T-711-VAD-HPR test its smoke sensor?
The S4T-711-VAD-HPR generates aerosol and moves it into its dual optical chamber. Both optical channel readings are checked, then the fan increases airflow to clear the aerosol through the smoke entry points. The panel checks the decline in optical readings and their return to ambient levels. A separate heat test warms the thermistor and checks its response. In normal detection, the two optical angles help the panel distinguish certain smoke aerosols from dust or steam in the environment.
What coverage settings does the S4T-711-VAD-HPR have?
The S4T-711-VAD-HPR red VAD provides C-3-14 coverage at High Power, C-3-13 at Medium Power and C-3-10 at Low Power. The corresponding category C volumes are 461.8, 398.1 and 235.6 cubic metres. Compliant operation requires a two-second flash period, and High or Medium Power needs an Enhanced Loop Card. This is a ceiling-mounted visual alarm. Its installation position must meet the needs of both the dual optical and heat detector and the visual warning coverage for occupants.
What current does the S4T-711-VAD-HPR beacon use?
The VAD function on the S4T-711-VAD-HPR has maximum loop currents of 16 mA at High Power, 11.5 mA at Medium Power and 6 mA at Low Power. The corresponding powers are 560, 403 and 210 mW. These values cover the visual alarm function. This model has no sounder. The Battery Standby and Loop Load Calculator must be used to size the installed loop and its standby requirement, taking account of the selected VAD setting and other connected devices.
What system and base does the S4T-711-VAD-HPR need?
The S4T-711-VAD-HPR fits an S4-700 base with an S4-705 IP21C plate mounted on a metal back box. Its Self-Test range supports Vigilon Plus and Compact Plus with compatible firmware and a VIGPLUS-LPC-EN loop card. Testing needs a CLSS gateway, the mobile app and an active Self-Test licence. The VAD must sit on a flat ceiling surface, positioned for detection and visual warning. This part has a white body. Its supplied dust cover protects the detector during building work and is removed before commissioning.
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