Gent S4 Heat Sensor Sounder
| Part no. | S4-780-S |
|---|---|
| Brand | Gent |
| Range | S4 Detectors |
| Sub-range | Detectors with Sounder |
Image for illustration; item supplied may differ
At a glance
- Heat sensor sounderThermistor heat sensor. An integral sounder provides audible warning.
- 5 selectable sensing modesSTATE 0: Class A1 heat. The response is selected during commissioning.
- Monitored sounderChannel 5 reports sounder faults to the panel.
- Integral short circuit isolatorThe head includes loop short circuit isolation. S-Quad devices take their power from the loop at 35 V to 48 V.
- S-Quad mounting optionsFits the separate S4-700 base; the S4-FLUSH kit supports semi-flush mounting for white S-Quad heads.
- Three tone signalsThe S-Quad sounder function provides intermittent, alternating and continuous tone signals, with configurable soft start.
Documents
Description
The Gent S4-780-S is an addressable heat sensor with an integral sounder for Vigilon Plus, Compact Plus and Nano fire alarm panels. Its thermistor provides heat sensing with five selectable classes: A1, B, BS, A2S and A2. The panel uses the selected heat mode to set the fire response. Class A1 is the factory default. The S-Quad sounder function gives an average 85 dB(A) at 1 m, with three selectable tone signals and a soft start option. The head is loop powered and includes a short circuit isolator. It fits the separately ordered S4-700 mounting base. Sounder faults report to the panel on channel 5.
The S4-780-S combines a thermistor heat sensor with an integral sounder. Analogue channel 2 carries the heat reading and channel 5 reports sounder faults. It has no optical smoke sensing, speech output or visual alarm device. The S4-770-S combines single optical and heat sensing with a sounder; the S4-771-S combines dual optical and heat sensing with a sounder.
Read the full technical description
The S4-780-S combines a thermistor heat sensor with an integral sounder. Analogue channel 2 carries the heat reading and channel 5 reports sounder faults. It has no optical smoke sensing, speech output or visual alarm device. The S4-770-S combines single optical and heat sensing with a sounder; the S4-771-S combines dual optical and heat sensing with a sounder.
The five selectable heat STATEs are 0 for Class A1, 5 for Class B, 6 for Class BS, 7 for Class A2S and 13 for Class A2. STATE 0 is the factory default. The panel sets the fire threshold and calculates any rate-of-rise element. Class BS has no rate-of-rise component, while Class A2S gives fixed-temperature operation without responding to transient temperature changes.
The S-Quad sounder function has an average output of 85 dB(A) at 1 m, or 75 dB(A) at 3 m at a bedhead. Its typical on-axis level at 90 degrees is 92 dB(A), and turbo mode adds 3 dB. Tone choices are intermittent 970 Hz at 1 Hz, alternating 730/970 Hz at 2 Hz, and continuous 970 Hz, with a frequency tolerance of +/-10%. Volume is set individually; maintain at least 65 dB(A) at 1 m. Soft start can ramp the volume to its selected level.
S-Quad devices take power from the loop at 35 V to 48 V. This head includes a short circuit isolator. Its Nano load factor is 6.5; Nano allows a maximum of 127 devices on its loop. This maximum is subject to loop loading. Use the Battery Standby and Loop Load calculator to determine the installed device mix, cable length and standby requirement.
The S4-780-S fits the separately ordered S4-700 base. Mount the base on a metal back box and maintain loop earth continuity. The S4-FLUSH kit provides semi-flush ceiling mounting for white S-Quad heads.
S-Quad sounders synchronise across all loops of one panel; synchronisation does not extend across a network of panels. The sounder circuit is monitored silently for failure. Use Vigilon commissioning tool version 1.32 or later for device-setting changes. Remove the supplied dust cover before commissioning.
Specifications
| Device type | Addressable heat sensor sounder |
|---|---|
| Sensor marking | H/S |
| Sensing elements | Thermistor heat sensor |
| Analogue sensing channels | 2: heat |
| Selectable sensing STATEs | 0, 5, 6, 7, 13 |
| Factory default | STATE 0: Class A1 heat |
| Compatible panels | Gent Vigilon Plus, Compact Plus and Nano |
| Power source | Loop powered |
| S-Quad loop operating voltage | 35 V to 48 V |
| Nano load factor per device | 6.5 |
| Nano panel loop limit | 127 devices maximum, subject to loop loading |
| Short circuit isolator | Integral |
| S-Quad isolator voltage data | Vmax 48 V; Vnom 40 V; Vmin 35 V; Vso max 16 V; Vso min 8 V |
| S-Quad isolator current and impedance | IC max 0.8 A; IS max 1.25 A; IL max 50 microamps; Zc max 0.13 ohm |
| S-Quad head dimensions | 117 mm diameter x 49.6 mm high |
|---|---|
| S-Quad height with standard base | 63.8 mm |
| S-Quad housing | ABS; white RAL 9010 |
| S-Quad operating temperature | -10°C to +50°C |
| S-Quad storage temperature | -20°C to +70°C |
| S-Quad relative humidity | 95% non-condensing at +5°C to +45°C |
| Mounting base | S4-700, ordered separately |
| S-Quad programmable connection | Monitored input or unmonitored output; default remote LED output |
| S-Quad external I/O cable limit | 15 m from base to external I/O unit |
| Sounder fault channel | Analogue channel 5 |
| S-Quad sounder output | Average 85 dB(A) at 1 m; 75 dB(A) at 3 m at a bedhead; typical on-axis 92 dB(A) at 90 degrees |
| S-Quad tone signals | Intermittent 970 Hz at 1 Hz; alternating 730/970 Hz at 2 Hz; continuous 970 Hz; frequencies +/-10% |
| S-Quad sounder adjustment | Turbo adds 3 dB; configurable soft start; minimum 65 dB(A) at 1 m |
Specifications per manufacturer documentation, subject to change. E&OE.
Standards and approvals
| Standard | What it covers |
|---|---|
| LPCB approved | Approved by the Loss Prevention Certification Board for fire detection and alarm system products. |
| EN 54-3:2001 + A1:2002 + A2:2006 | |
| EN 54-5:2000 + A1:2002 | |
| EN 54-17:2005 + AC:2007 | |
| EN 54-18:2005 + AC:2007 | |
| Declaration of Performance 076-CPR-2013 Issue 2 | |
| LPCB listing 042ak/04 |
Approval body: LPCB (notified body 2831).
Documents
| Document | Type | Size | Download |
|---|---|---|---|
| Installation manual (NANO-24, NANO-FLUSH, PRINTER-HAND, S3-S-R, S3EP-S-R, S3EP-V-VAD-HPR-R, S3EP-V-VAD-HPW-R, S3EP-VAD-HPR-R, S4-34440-12, S4-711-V, S4-711-V-VAD-HPR, S4-711-V-VAD-HPW, S4-711-V-VAD-LPR, S4-711-VAD-HPR, S4-720-V-VAD-HPR, S4-780-S, S4-911-V-VAD-HPW) | Installation | 5.7 MB | Download PDF |
| Gent 4188-1073 issue 7 - S-Quad data and installation (white and black) | Installation | 7.2 MB | Download PDF |
FAQs
Does the S4-780-S provide smoke detection as well as a sounder?
The S4-780-S combines heat detection and an integral tone sounder. It has a thermistor for heat sensing, with its reading carried on analogue channel 2, and channel 5 reports sounder faults. It has no optical smoke sensing. The S4-770-S combines single optical and heat sensing with a sounder, while the S4-771-S combines dual optical and heat sensing with a sounder. All three are loop powered, include a short circuit isolator and fit a separately ordered S4-700 standard base.
Which heat settings does the S4-780-S provide?
Five heat STATEs are selectable: STATE 0 is Class A1, STATE 5 is Class B, STATE 6 is Class BS, STATE 7 is Class A2S and STATE 13 is Class A2. The factory default is STATE 0. The panel sets the temperature response and calculates any rate-of-rise contribution. Class BS has no rate-of-rise component, while Class A2S gives fixed-temperature operation without reacting to transient temperature variations. These choices apply to the heat-sensing function of the S4-780-S; its sounder is configured separately.
Which tones and volume settings are available on the S4-780-S?
The S-Quad sounder function provides intermittent 970 Hz at 1 Hz, alternating 730/970 Hz at 2 Hz, and continuous 970 Hz, with frequencies subject to +/-10% tolerance. Average sound output is 85 dB(A) at 1 m, or 75 dB(A) at 3 m at a bedhead. Turbo mode adds 3 dB. Volume is individually adjustable and must remain at least 65 dB(A) at 1 m for EN 54-3 compliance. A configurable soft start raises the volume gradually to its selected level.
Which base does the S4-780-S need?
The S4-780-S fits the standard S4-700 base, ordered separately from the sensor head. Mount the base on a metal back box, with earth continuity maintained around the loop. The S4-FLUSH kit provides semi-flush ceiling mounting for white S-Quad heads. S-Quad heads measure 117 mm in diameter and 49.6 mm high, or 63.8 mm high with a standard base. Remove the supplied dust cover before the fire alarm system is commissioned.
How does the S4-780-S connect to a Nano loop?
The S4-780-S takes its power from the loop and has a Nano load factor of 6.5 per device. Nano allows a maximum of 127 devices on its loop, subject to loop loading. Use the Battery Standby and Loop Load calculator for the installed mix, cable length and standby requirement. Heat readings report on analogue channel 2 and sounder faults on channel 5. The head includes a short circuit isolator and fits the separately ordered S4-700 base.
Also in this range
- S4-770-SS4 Optical Heat Sensor Sounder£75.35ex VAT£90.42 inc VATIn stock
- S4-771-SS4 Dual Optical Heat Sensor Sounder£91.50ex VAT£109.80 inc VATIn stock
