Jkd-512com User Manual May 2026
Important: For long cables (>100m), enable the built-in 120Ω termination by closing DIP Switch 2 on the side panel.
The jkd-512com comes with a [12 / 24] month limited warranty against manufacturing defects.
For support:
For applications that require a real COM port:
LED diagnostic table (summary):
Product Code: JKD-512COM
Firmware Version: 3.2.1 (Compatible with 2025 updates)
Document Version: 4.0
| Parameter | Default Value | |----------------|------------------------| | Device Address | 1 | | Baud Rate | 9600 | | Data bits | 8 | | Parity | None | | Stop bits | 1 |
JKD-512COM is a 2-in-1 combination detector designed to monitor both carbon monoxide (CO) and smoke. While widely available on platforms like Amazon and Aliexpress, it is critical to note that major safety bodies, including the U.S. Consumer Product Safety Commission (CPSC), have issued urgent warnings to stop using this specific model (manufactured by Shenzhen Jikaida Technology) because it may fail to alert users to fire or CO. Key Specifications
Sensor Types: Electrochemical CO sensor and infrared photoelectric smoke sensor. Power: 3 x 1.5V AA batteries (replaceable).
Display: Backlit LCD screen showing CO levels (000–999 ppm) and smoke concentration.
Alarm Output: 80dB audible siren with a flashing red LED light.
Dimensions: Approximately 10.3cm in diameter and 3.5cm in height. Installation Guide
Preparation: Twist the unit counter-clockwise to remove the mounting bracket.
Battery Setup: Insert three AA batteries into the rear compartment, observing correct polarity. The device should beep once to indicate it is powered on. Placement:
Distance: Install at least 10 feet (3 meters) away from fuel-burning appliances to avoid nuisance alarms. Ceiling: Mount at least 4 inches (10cm) from side walls.
Wall: If wall-mounted, place it 4 to 12 inches (10-30cm) below the ceiling. jkd-512com user manual
Mounting: Drill holes 5.5cm apart for the wall plugs and secure the bracket with screws. Clip the alarm back into the bracket with a clockwise twist. Operation & Testing
Weekly Testing: Press the central "TEST" button once. The unit will cycle through its alarm patterns and display current sensor readings. LCD Display:
Standby: Displays "0" or remains blank until gas is detected.
Low Battery: The screen will show a battery icon or "Lb," accompanied by a periodic chirp.
Hush Feature: If a false alarm occurs (e.g., from cooking smoke), press the Test button to temporarily silence the siren. Maintenance & Safety Warning
Cleaning: Vacuum the unit monthly to prevent dust buildup. Do not use cleaning sprays, solvents, or paints on the device.
Replacement: Replace the entire unit immediately if the "End of Life" signal occurs or if it fails a manual test.
Safety Recall: Due to reported failures in meeting UL 217 and EN 50291-1 standards, safety authorities recommend replacing the JKD-512COM
with a detector that is explicitly certified for your region.
JKD-512COM is a 2-in-1 combination detector designed to monitor both carbon monoxide (CO) and smoke levels in a single wireless unit. gadgetplanet.com.ua Product Overview Dual Sensors
: Features a high-reliability electrochemical CO sensor and an infrared photoelectric smoke sensor. Power Source : Operates autonomously using 3 x AA batteries (not included). Alarm System : Emits a loud
siren and includes visual LED flashing when hazards are detected.
: A backlit LCD screen shows current CO levels (000–999 PPM) or smoke density. gadgetplanet.com.ua Operational Instructions Initial Setup
: Insert three AA batteries. The unit does not require manual settings and begins monitoring immediately. Self-Testing : Press the single Important: For long cables (>100m), enable the built-in
button on the front of the device. This checks the alarm's circuitry, siren, and sensors. It also allows you to view current ambient readings. Low Battery Warning
: The device will chirp every 30 seconds and display a low-battery icon on the LCD when power is low. Replace batteries immediately to maintain protection.
: If the alarm triggers, pressing the Test/Reset button will silence the siren and reset the sensors. gadgetplanet.com.ua Installation Guidelines Recommended Placement
: Best installed on the ceiling or high on a wall. For maximum coverage, place in bedrooms, hallways, or near potential CO sources (like boilers). Coverage Area : Covers approximately 60–80 m² depending on the ceiling height.
Attach the mounting bracket to the surface using the provided screws or heavy-duty adhesive.
Align the device with the bracket and rotate clockwise to lock it in place. gadgetplanet.com.ua Technical Specifications CO Detection Range 000–999 PPM Smoke Sensitivity 0.1% db/m to 9.9% db/m Operating Temperature 0°C to 50°C Sensor Lifespan Approximately 7 years Standards Compliance EN14604 (Smoke) and EN50291 (CO) safety tips for where to place these detectors in a multi-story home?
Датчик угарного газа + датчик дыма с сиреной 2в1 JKD 512COM
The JKD-512COM Go to product viewer dialog for this item. is an integrated carbon monoxide and smoke detector. According to the JKD-512COM User Manual, this device is designed to provide optimal performance in home safety by detecting both fire and gas threats. Key Sections of the Guide
Box Contents: The Quick Start Guide indicates the package includes the device, power cord, user manual, and a warranty card.
Performance Maintenance: The manual emphasizes regular testing and proper placement for "ideal performance."
Safety Features: It functions as a "2-in-1" alarm, alerting users to dangerous levels of CO and the presence of smoke.
JKD-512COM user manual provides essential instructions for operating this combined carbon monoxide and smoke alarm. This device is designed to detect both smoldering fires and toxic carbon monoxide levels, providing a dual layer of protection for your home. Key Features and Setup Dual-Sensor Technology
: Features both an electrochemical CO sensor and a photoelectric smoke sensor for comprehensive monitoring. LCD Display
: Shows real-time CO concentration in parts per million (PPM) and battery status. Power Source The jkd-512com comes with a [12 / 24]
: Typically powered by 3 x 1.5V AA batteries. It is recommended to use high-quality alkaline batteries for longevity. Installation
: Should be installed on ceilings or high walls in sleeping areas and on every level of the home. Avoid "dead air" spaces like corners or areas near bathrooms where steam may cause false alarms. Understanding Alarm Signals Smoke Alarm
: A series of loud, continuous beeps with a flashing red LED.
: Four quick beeps followed by five seconds of silence, accompanied by the PPM reading on the LCD. Low Battery
: A single "chirp" every 30–45 seconds indicates the batteries need immediate replacement. Malfunction
: If the screen displays "Err" or chirps without an LED flash, the unit may have a sensor failure. Maintenance Tips Weekly Testing
: Press and hold the "Test/Reset" button to ensure the circuitry and siren are functioning.
: Vacuum the vents monthly using a soft brush attachment to remove dust and cobwebs that can interfere with sensors. Replacement
: Most JKD-512COM units have a lifespan of 5 to 7 years. Check the "replace by" date on the back of the device. step-by-step guide
on how to interpret the specific numeric CO levels shown on the display?
JKD-512COM is a 2-in-1 combination detector designed to monitor for both Carbon Monoxide (CO) Smoke/Fire
. Below is a comprehensive guide for its setup, operation, and maintenance. gadgetplanet.com.ua Product Specifications
: Electrochemical CO sensor and Infrared photoelectric sensor. Power Source : 3 x 1.5V AA Batteries (not included). Alarm Volume at 3 meters. LED Indicators : Normal operation (flashes every 30–45 seconds).
: Alarm mode (flashes rapidly during CO or smoke detection). Yellow/Blue
: May indicate a fault or low battery depending on your specific sub-model. Installation Guide JKD-516R说明书EN V24.07.09 [已恢复] - Expert4House