POTTER CPS-24N Conventional Photoelectric Smoke Detector Owner’s Manual

CPS-24N

Conventional Photoelectric Smoke Detector

Features

• 360° view of detector status LED

• Low profile, 2″ high (with base)

• 2 or 4 wire base compatibility, relay bases available

• Highly stable operation, RF/Transient protection

• Low standby current, 59µA at 24VDC

• One built-in power/sensitivity supervision/alarm LED

• Automatic Sensitivity window verification function meets outlined requirements in NFPA 72, Chapter 2 & 7, Inspection, Testing and Maintenance.

• Without Magnetic Test Feature

Description

The CPS-24N is a reliable, high quality Photoelectric Smoke Detector. It can be used in all open areas where Photoelectric Smoke Detectors are required, including in-duct applications. The computerdesigned smoke chamber makes the CPS-24N well suited for detecting smoldering fires as well as fast-flaming fires.

Operation

The CPS-24N photoelectric smoke detector utilizes one bicolored LED for indication of status. In a normal standby condition the LED flash Green every 3 seconds. When the detector senses that its sensitivity has drifted outside the UL listed sensitivity window the LED will flash Red every 3 seconds. When the detector senses smoke and goes into alarm the status LED will latch on Red.

The detector utilizes an infrared LED light source and silicon photodiode receiving element in the smoke chamber. In a normal standby condition, the receiving element receives no light from the pulsing LED light source. In the event of a fire, smoke enters the detector smoke chamber and light is reflected from the smoke particles to the receiving element. The light received is converted into an electronic signal.

Fire Judgement signals are processed and compared to a reference level, and when five consecutive signals exceeding the reference level are received within a specified period of time, the time delay circuit triggers the SCR switch to activate the alarm signal. The status LED lights continuously during the alarm period.

Technical Specifications

8840008.

Specifications

The contractor shall furnish and install where indicated on the plans, Potter Electric Signal CPS-24N photoelectric smoke detectors. The combination detector head and twist-lock base shall be UL listed compatible with a UL listed fire alarm panel.

The base shall permit direct interchange with Potter CPS-24VN combination photoelectric smoke detector. The base shall be appropriate twist-lock base SB Series. In the event of partial or complete retrofit, the CPS-24N may be used in conjunction with, or as a replacement for, Potter detectors (PS-24, PS-24H and the IS-24) on most SB base applications.

The smoke detector shall have one flashing status LED for visual supervision. When the detector is in standby condition the L ED will flash Green. When the detector is outside the UL listed sensitivity window the LED will flash Red. When the detector is actuated, the flashing LED will latch on Red. The detector may be reset by actuating the control panel reset switch.

The sensitivity of the detector shall be capable of being measured. The sensitivity of the detector shall be monitored automatically and continuously to verify that it is operating within the listed sensitivity range. To facilitate installation, the detector shall be non-polarized. Voltage and RF transient suppression techniques shall be employed to minimize false alarm potential. Auxiliary SPDT relays shall be installed where indicated.

CPS-24N Sensitivity Test Feature

The Potter CPS-24N Photoelectric Smoke Detector has a built-in automatic sensitivity test feature.

1. In normal condition, the status LED flashes green.
2. When the sensitivity drifts outside of its sensitivity limits, the status LED flashes red.
3. In the alarm state, the status LED is red continuously.
4. When the sensitivity drifts outside of its sensitivity limits and the status LED flashes red, the device needs to be cleaned or returned to the factory for cleaning or calibration.

Ordering Information

2 WIRE OPERATION

1. UL LISTED CONTROL PANEL
2. PANEL POWER SUPPLY
3. NEGATIVE
4. Resistor shown is for example only. Not all annunciators have in line resistance.
5. Annunciation device must be current limited to 20 mA 24VDC Maximum. Not limiting current could result in damage to the detector or cause a no alarm condition.
6. LISTED END OF LINE DEVICE

NOTE:
– WIRING TERMINALS FOR THE NS4 AND NS6 ARE IDENTICAL
– BASES WITH THE “W” SUFFIX ARE WHITE IN COLOR

2 WIRE RELAY OPERATION

1. UL LISTED CONTROL PANEL
2. LISTED END OF LINE DEVICE
3. 2 AND 4 WIRE BASE RELAYS SHOWN WITH POWER OFF.

4- WIRE OPERATION

1. INITIATING CIRCUIT
2. UL LISTED POWER SUPPLY 24VDC
3. LISTED END OF LINE DEVICE
4. LISTED END OF LINE RELAY HA- EOLR- 24

Potter Electric Signal Company, LLC · St. Louis, MO · Phone: 800-325-3936 · www.pottersignal.com

8830138 – REV A

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Documents / Resources

| POTTER CPS-24N Conventional Photoelectric Smoke Detector [pdf] Owner's Manual
CPS-24N Conventional Photoelectric Smoke Detector, CPS-24N, Conventional Photoelectric Smoke Detector, Photoelectric Smoke Detector, Smoke Detector
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