Silent Knight IDP-PHOTO Intelligent Photoelectric Smoke Detector

The Silent Knight IDP-PHOTO Intelligent Photoelectric Smoke Detector is an addressable smoke detector designed for compatible Silent Knight and Farenhyt fire alarm control panels. It uses photoelectric sensing technology to detect smoke while providing individual point identification through the system’s signaling line circuit.

The IDP-PHOTO combines an optical sensing chamber with intelligent communication, rotary decimal addressing, programmable sensitivity, and status LEDs. It is a plug-in detector that uses a separately installed compatible detector base.

Product Functions

• Provides intelligent addressable smoke detection
• Uses photoelectric optical sensing technology
• Provides individual point identification
• Uses rotary decimal addressing
• Supports programmable smoke sensitivity
• Communicates smoke-density information
• Supports compatible Silent Knight fire alarm panels
• Provides dual status LEDs
• Supports remote LED annunciation
• Supports magnetic functional testing
• Uses interchangeable plug-in detector bases
• Supports standard, relay, isolator, and sounder bases
• Designed for open-area smoke detection

Photoelectric Smoke Detection

The IDP-PHOTO uses photoelectric sensing technology to detect airborne smoke particles.

Smoke entering the sensing chamber scatters light toward the optical sensor. The detector evaluates this condition and communicates smoke information to the compatible fire alarm control panel.

This intelligent architecture allows the control system to evaluate detector conditions and provide alarm, maintenance, and status information.

Intelligent Addressable Operation

Each IDP-PHOTO operates as an individually identifiable point on the signaling line circuit.

The fire alarm control panel associates the detector’s address with a programmed location, allowing personnel to identify the specific detector reporting an alarm or maintenance condition.

Rotary Addressing

The IDP-PHOTO uses rotary decimal address switches.

This allows the detector address to be selected directly at the device, simplifying system commissioning, troubleshooting, and detector replacement.

Programmable Sensitivity

The IDP-PHOTO supports programmable smoke sensitivity through compatible fire alarm control equipment.

Published sensitivity extends approximately from:

0.5% to 4.0% per foot obscuration

The system can monitor detector sensitivity and identify conditions that may require maintenance.

LED Status Indication

The detector incorporates two integral LEDs that provide broad visual indication around the detector.

The LEDs can indicate communication, alarm, and detector status according to the capabilities and programming of the connected fire alarm control panel.

Remote LED Capability

The IDP-PHOTO supports compatible remote annunciation equipment such as:

RA100Z — Remote LED Annunciator

This provides remote detector indication when the detector itself is installed in a location where its onboard LEDs are difficult to observe.

Magnetic Functional Test

The detector supports functional testing using an external magnet.

Compatible accessories include:

M02-04-01 — Test Magnet

M02-09-00 — Test Magnet with Telescoping Handle

This provides a convenient method for checking detector response during routine inspection and servicing.

Compatible Detector Bases

Compatible base configurations include:

B501 — Standard Detector Base

B300-6 — 6-inch Detector Base

B200S — Sounder Base

B224BI — Isolator Base

B224RB — Relay Base

The plug-in design allows the detector head to be removed or replaced without disturbing field wiring connected to the base.

Electrical & Detection Information

Model: IDP-PHOTO

Device Type: Intelligent Photoelectric Smoke Detector

Sensing Technology: Photoelectric

Operating Voltage: 15–32 VDC

Standby Current: Approximately 200 µA at 24 VDC

Maximum Current: Approximately 4.5 mA at 24 VDC

Sensitivity: Approximately 0.5–4.0%/ft obscuration

Addressing: Rotary Decimal

Air Velocity: 0–4,000 ft/min

Relative Humidity: 10–93%, non-condensing

Status Indicators: Dual LEDs

Detector Base: Separately ordered

Exact compatibility should be verified against the specific Silent Knight fire alarm control panel and detector base.

IDP-PHOTO Datasheet