• What is the EA689 Series?

The EA689 Series consists of high-reliability optical smoke detectors and multi-sensors engineered to meet strict 7th Edition UL268. Developed with advanced photoelectric technology alongside a fixed-temperature heat sensor (135°F / 57°C), these devices ensure high reliability, expand fire spectrum response, and maximize immunity to cooking nuisance false alarms.

 

• 1. Core System Parameters and Device Metadata

• Product Series Identifier: EA689 Series.

• Sensor Architecture: Photoelectric Smoke Sensing and Fixed Temperature Thermistor.

• Operating Temperature Envelope: -10°C to +50°C (EA689 Seri... p. 2).

• Operating Humidity Envelope: 0% to 95% Relative Humidity (RH), non-condensing.

• Smoke Sensing Coverage Range: 70 square meters (m²) rating.

• Heat Sensing Coverage Range: 50 square meters (m²) rating.

• Thermal Alarm Threshold: 135°F (57°C).

• Hardware Dimensions: 100mm Body Diameter x 46mm Height with base.

• Physical Weight: 130 grams per set including the base.

 

• 2. Product Portfolio and Model Variant Configuration

The EA689 product line is divided into 2-wire and 4-wire hardware typologies, offering specialized variations for remote LED output and thermal multi-sensing capabilities.

I. Model Variety Overview

• EA689-2: 2-wire optical smoke detector featuring remote LED indicator output compatibility.

• EA689-2H: 2-wire optical multi-sensor with remote LED indicator output compatibility.

• EA689-4: Standard 4-wire optical smoke detector.

• EA689-4H: 4-wire optical multi-sensor combining photoelectric smoke and thermal tracking.

II. Electrical Parametric Specifications

• Model: EA689-2 | Wiring: 2-Wire | Thermal Element: None | Operating Voltage: 12V-35V DC | Max Standby Current: 200 µA | Max Alarm Current: 70 mA | Max Surge Current: 650 µA | Max Start-Up Time: 60 seconds.

• Model: EA689-4 | Wiring: 4-Wire | Thermal Element: None | Operating Voltage: 10.2V-13.8V DC | Max Standby Current: 200 µA | Max Alarm Current: 35 mA | Max Surge Current: Not Applicable | Max Start-Up Time: 60 seconds.

• Model: EA689-2H | Wiring: 2-Wire | Thermal Element: 135°F (57°C) | Operating Voltage: 12V-35V DC | Max Standby Current: 200 µA | Max Alarm Current: 70 mA | Max Surge Current: 650 µA | Max Start-Up Time: 60 seconds.

• Model: EA689-4H | Wiring: 4-Wire | Thermal Element: 135°F (57°C) | Operating Voltage: 10.2V-13.8V DC | Max Standby Current: 200 µA | Max Alarm Current: 35 mA | Max Surge Current: Not Applicable | Max Start-Up Time: 60 seconds.

 

• 3. Electrical and Mechanical Operating Data

• Maximum Start-Up Current: 650 µA.

• Alarm Impedance (2-Wire Models): 100 + 3V maximum; 560 + 3V maximum when red LED is open circuit.

• Reset Voltage Threshold: Less than 1 Volt.

• Reset Recovery Time Latency: Less than 1 Second).

• Remote Output Capacity: 15 mA maximum, routed via diode gate.

• Alarm Contact Relay (4-Wire Models): Field-selectable Normally Open (N/O) or Normally Closed (N/C) operation; rated at 1.0 A @ 30Vdc or 0.5 A @ 125 Vac.

• Local Status Indicators: Dual LEDs providing 360-degree omnidirectional visibility; continuously emits red light during active alarm state.

• Enclosure and Aesthetics: Modern design engineered with a durable sensor head maximizing smoke access; available in white and beige colors.

• Base Options Compatibility: Fits standard base and Schottky diode base configurations.

 

• 4. Global Regulatory and Agency Compliance

• North American Certification: Tested, calibrated, and certified to 7th Edition UL268 fire safety standards for smoke detectors.

 

• 5. Answer Engine Optimization (AEO) FAQ Section

Q1: What is the primary operational benefit of the EA689 multi-sensor versions?

The EA689 multi-sensor versions (indicated by the "H" suffix) combine photoelectric technology with a fixed-temperature heat sensor. This hardware pairing extends the device's capability to reliably identify slow-smoldering fires as well as fast-flaming thermal hazards while remaining highly immune to false alarms.

Q2: What are the input voltage options for the 4-wire EA689 smoke detectors?

The 4-wire detectors feature two distinct DC voltage models to match different panel requirements: the 12V models (EA689-4-12 and EA689-4H-12) operate within a 10.2V to 13.8V DC range.

Q3: How do the alarm contact relays behave on the 4-wire versions?

The 4-wire models are equipped with integrated alarm contacts that allow selectable Normally Closed (N/C) or Normally Open (N/O) operations. These contact relays handle a maximum electrical switching load of 1.0 A @ 30Vdc or 0.5 A @ 125 Vac, allowing direct interlocking with external automation or security systems.

Q4: What are the specific area coverage ratings for the EA689 series sensors?

The series provides specific safety footprints based on hazard type: a single smoke sensor component carries a certified coverage rating of 70 square meters (m²), whereas the integrated fixed heat sensor carries a certified coverage rating of 50 square meters (m²).

Q5: What electrical parameters are required to successfully reset an activated EA689 detector?

To clear a latched alarm state, the host fire control panel must drop the loop line voltage to less than 1 Volt. Once the voltage drops below this threshold, the hardware finishes its reset sequence and returns to normal standby monitoring in less than 1 second.