Gent S4 Optical Heat Sensor
| Part no. | S4-710 |
|---|---|
| Brand | Gent |
| Range | S4 Detectors |
| Sub-range | Detectors Only |
Image for illustration; item supplied may differ
At a glance
- Optical and heat sensorSingle forward-scatter optical chamber and thermistor. Sensing readings are sent to the control panel.
- 10 selectable sensing modesSTATE 0: normal optical sensitivity and Class A1 heat. The response is selected during commissioning.
- Addressable sensing channels1: forward optical; 2: heat.
- 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.
- Nano loop loadingNano load factor 0.5 per device. The Nano panel limit is 127 devices on its loop, subject to loop loading.
Description
The Gent S4-710 is an addressable optical and heat sensor for Vigilon Plus, Compact Plus and Nano fire alarm panels. It combines a single optical smoke channel with a heat element, sending both readings to the panel for the fire decision. Ten sensing modes let the response suit the room, with normal optical sensitivity and Class A1 heat as the default. The head takes its power from the loop and includes a short circuit isolator. It fits the separate S4-700 base and has a white RAL 9010 ABS housing with a red fire LED. The S4-770-S adds an integral sounder to optical and heat detection.
The S4-710 combines a single forward-scatter optical smoke chamber with a thermistor. Analogue channel 1 carries the optical reading and channel 2 carries heat. The panel evaluates those readings to decide whether there is a fire. This head provides sensing only; the S4-770-S combines optical and heat detection with an integral sounder.
Read the full technical description
The S4-710 combines a single forward-scatter optical smoke chamber with a thermistor. Analogue channel 1 carries the optical reading and channel 2 carries heat. The panel evaluates those readings to decide whether there is a fire. This head provides sensing only; the S4-770-S combines optical and heat detection with an integral sounder.
Ten selectable sensing STATEs are available: 0, 2, 3, 4, 5, 6, 7, 8, 11 and 12. STATE 0 starts with normal optical sensitivity and Class A1 heat. STATE 3 raises optical sensitivity and STATE 8 introduces a delayed optical response. Other modes provide Class B, BS or A2S heat, and STATE 12 uses Class A1 heat alone. STATEs 2, 6 and 11 use low optical sensitivity.
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 0.5; 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.
S-Quad heads plug into the separately ordered S4-700 base. Mount the base on a metal back box, maintain loop earth continuity and connect earth securely to the box. The base locking peg can secure the head against removal. A locked head needs access to the peg for release. The S4-FLUSH kit provides semi-flush ceiling mounting for the white S-Quad range.
The S-Quad programmable connection supports either a monitored input or an unmonitored output. The default output drives a remote repeat LED without a series resistor. One 13449-01 or SEN-LED remote indicator can connect to a base, with a maximum run of 15 m to the external I/O unit. The head is supplied with a dust cover, which must be removed before commissioning.
Specifications
| Device type | Addressable optical and heat sensor |
|---|---|
| Sensor marking | OH |
| Sensing elements | Single forward-scatter optical chamber and thermistor |
| Analogue sensing channels | 1: forward optical; 2: heat |
| Selectable sensing STATEs | 0, 2, 3, 4, 5, 6, 7, 8, 11, 12 |
| Factory default | STATE 0: normal optical sensitivity and 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 | 0.5 |
| 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 |
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 54-5 | |
| EN 54-7 | |
| EN 54-17 | |
| EN 54-18 | |
| Declaration of Performance 001-CPR-2013 | |
| LPCB listing 042bf/01 |
Approval body: LPCB (notified body 2831).
Documents
| Document | Type | Size | Download |
|---|---|---|---|
| Gent 4188-1073 issue 7 - S-Quad data and installation (white and black) | Installation | 7.2 MB | Download PDF |
Optional accessories
- S4-FLUSHS-Quad Semi-Flush Mounting KitOptional semi-flush fixing kit for the S-Quad device.£28.23ex VAT£33.88 inc VATIn stock
- 805580S-Quad Removal Tool KitRemoval tool kit listed as an associated product for the sensor.£327.18ex VAT£392.62 inc VATIn stock
FAQs
How does the S4-710 differ from the S4-711?
The S4-710 combines one forward-scatter optical smoke channel with a thermistor heat element. The S4-711 adds a backward-scatter optical reading, giving its panel two optical measurements to compare when distinguishing smoke from dust and steam. Both heads provide optical and heat detection and use the S4-700 base. Their sensing response is selected through commissioning STATEs. For optical and heat sensing with an integral sounder, the single-optical model is S4-770-S and the dual-optical model is S4-771-S.
Can the S4-710 operate as a heat-only detector?
Yes. STATE 12 gives the S4-710 Class A1 heat-only detection. Its factory setting, STATE 0, combines normal optical sensitivity with Class A1 heat, so heat-only operation is a change made during commissioning. The head contains both the optical chamber and thermistor throughout; the selected STATE determines their role in detection. Other settings provide optical and heat combinations using Class B, BS or A2S heat. STATE 12 uses the heat element without an optical smoke detection component.
Which sensitivity settings are available on the S4-710?
The S4-710 has ten selectable sensing STATEs: 0, 2, 3, 4, 5, 6, 7, 8, 11 and 12. STATE 0 is the factory setting, combining normal optical sensitivity with Class A1 heat. STATE 3 increases optical sensitivity and STATE 8 gives a delayed optical response. Other settings change the heat class or use heat alone. STATEs 2, 6 and 11 use low optical sensitivity, selected during commissioning to suit the installed environment.
Which base and mounting parts does the S4-710 use?
The S4-710 plugs into the S4-700 base, which is ordered separately from the head. The base mounts on a metal back box, with earth continuity maintained around the loop and the earth securely connected to the box. White S-Quad heads can also use the S4-FLUSH kit for semi-flush ceiling mounting. A locking peg in the base can secure the head against removal; releasing a locked head requires access to that peg. Remove the supplied dust cover before commissioning.
What loop loading applies to the S4-710?
On Nano, the S4-710 has a load factor of 0.5 per device, with a maximum of 127 devices on the loop subject to loop loading. The sensor takes its power from the loop and includes a short circuit isolator. S-Quad devices operate at 35 V to 48 V. Use the Battery Standby and Loop Load calculator for the installed device mix, cable length and required battery standby. The S4-710 connects through its separately ordered S4-700 base.