Important: For long cables (>100m), enable the built-in 120Ω termination by closing DIP Switch 2 on the side panel.
| Parameter | Value | |--------------------|---------------------------| | Model | jkd-512com | | Power Supply | [e.g., 5V DC / 12–24V DC] | | Communication Interface | [RS-232 / RS-485 / USB / Ethernet] | | Baud Rate | [e.g., 9600 – 115200 bps] | | Operating Temp. | [e.g., -10°C to +60°C] | | Dimensions | [L×W×H mm] |
Copyright © 2025 JKD Systems. All rights reserved.
No part of this manual may be reproduced without written permission. JKD-512COM is a trademark of JKD Systems. Other product names are trademarks of their respective owners. Specifications subject to change without notice.
End of User Manual for JKD-512COM.
The JKD-512COM is a 2-in-1 battery-powered combination smoke and carbon monoxide (CO) detector. While it is marketed as a convenient, budget-friendly safety solution, it currently carries a critical safety warning from major regulatory bodies. Safety Warning (Action Required)
The U.S. Consumer Product Safety Commission (CPSC) issued an urgent warning in early 2024 for consumers to immediately stop using, remove batteries from, and dispose of the JKD-512COM.
Reason: The device failed to meet UL safety standards (specifically UL 2034 and UL 217) and may fail to alert residents during a fire. jkd-512com user manual
Recommendation: Replace it with a detector that is officially UL-certified to ensure it functions during an actual emergency. Quick Device Review
If you currently own this device, here are its primary features and common user feedback:
Design & Installation: It uses a simple twist-on ceiling mount and is powered by 3 AA batteries. It features a central LCD that shows CO levels in PPM (000–999) and smoke concentration percentages. Important: For long cables (>100m), enable the built-in
Usability: It has a single "Test" button to check sensors and current room values. Users generally find it easy to install, but many professional reviews and safety experts warn that it cannot be relied upon due to lack of certification.
Alerts: It uses an 80dB siren and a flashing red light for alarms. It also includes a low-battery notification (audio chirp and visual "LB" on the screen). Manual & Operation Basics Status Normal Operation Green LED may flash intermittently to indicate power. Low Battery Screen displays "LB" and the unit will chirp regularly. Alarm (CO) Siren sounds and LCD shows the CO concentration in PPM. Alarm (Smoke) Siren sounds and LCD displays smoke density.
Welcome to the official reference guide for the JKD-512COM system. Whether you are a first-time user, an IT administrator, or a field technician, this manual is designed to help you understand every feature, port, and command of the JKD-512COM device. First steps:
The JKD-512COM represents a new generation of integrated communication controllers, combining industrial-grade relay outputs with high-speed serial data transfer. It is widely used in automation, remote sensing, and legacy system integration. Please read this entire document before powering on your device.
Important: Keep your serial number (located on the bottom panel) handy. You will need it for driver downloads at the official JKD support portal.