KC868-A16 board - wired security system

[lxndrbrn]

I would like to build a home alarm system based on the KC868-A16 board. I plan to document everything as precisely as possible to make it easier for others to follow this path.

Starting point:
My house is wired with copper cables leading to every window, door, and most room ceilings.
I use Home Assistant with the MQTT2Zigbee plugin and mainly Zigbee devices.

The goal:
A wired alarm system with a power backup, integrated into Home Assistant, and with relatively low acquisition costs.

The initial questions are:
1. Can I simply connect a magnetic sensor to the digital inputs?
(If yes, what voltage do they operate on?)
2. Can I connect a 24V siren to the dry contact output?
Could I power it separately using the board’s 12V power supply?

I would greatly appreciate your help.
Thank you very much.



PS.: I am currently designing a 3D case for the board (which I’ll gladly share with the community once it’s ready).
Also ive got many Cases for Mounting of the magnet sensors and the movementdetectors.

[admin]

1. Yes, it's OK, it can use by dry contact signal. or input dc12v (logical "0"), dc0v (logical "1").

2. if you want use 24v siren. just let KC868-A16 work with DC24V power supply is OK. board support DC12-24V power supply.

we suggest you chose new B16M Controller for your house. Because it made by ESP32-S3 chip. in future, all new firmware update and new functions will based on new controller. KC868-A16 is stop maintenance.

[lxndrbrn]

1. Yes, it's OK, it can use by dry contact signal. or input dc12v (logical "0"), dc0v (logical "1").

2. if you want use 24v siren. just let KC868-A16 work with DC24V power supply is OK. board support DC12-24V power supply.

we suggest you chose new B16M Controller for your house. Because it made by ESP32-S3 chip. in future, all new firmware update and new functions will based on new controller. KC868-A16 is stop maintenance.

---

1. Yes, it's OK, it can use by dry contact signal. or input dc12v (logical "0"), dc0v (logical "1").

2. if you want use 24v siren. just let KC868-A16 work with DC24V power supply is OK. board support DC12-24V power supply.

we suggest you chose new B16M Controller for your house. Because it made by ESP32-S3 chip. in future, all new firmware update and new functions will based on new controller. KC868-A16 is stop maintenance.

This is the Picture. 

[lxndrbrn]

Hello dear Admin,

thank you very much for the fast reply.
Unfortunately, I actually bought the older A16 board. The budget for this project is a bit tight and the board seems to meet all my requirements.



Can you please take a look at my drawing?

1. how much voltage would the circuits for Door Magnet 1 and Door Magnet 2 get?

2. can I do this with the 12 v and 24 v power supplies?

3. would Door Magnet 3 and Door Magnet 4 work?



I have, as promised, designed the case for the board. Can I post it here, or should I make a separate post in the forum?

https://www.thingiverse.com/thing:6837967

[admin]

1. how much voltage would the circuits for Door Magnet 1 and Door Magnet 2 get?

-->usually door sensor output two wire, dry contact, not need power supply. just connect to digital input ports and GND is ok.

2. can I do this with the 12 v and 24 v power supplies?

-->why not use one DC24V power supply? KC868-A16 support DC 12-24V power supply.

3. would Door Magnet 3 and Door Magnet 4 work?

--> "Door Magnet" is a sensor? if YES, can't connect to OUTPUT port, you should connect with digital input ports, as same as "Door Magnet1" and "Door Magnet2"

Thanks share your 3D files.

[vdeconinck]

Hi,

I am interested in a similar project.
I am running a Domoticz-based home-made alarm for a long time, using Rasberry Pi GPIOs to connect door/window reed sensors and trigger the alarm sound/light, and I want to update/extend it, so I would like to switch to a A16 board and Home Assistant.

At that time, I had to build a DIY Rasberry Pi HAT to filter out transient spikes that appeared on the sensor lines:

   

Are the A16 inputs more immune to spikes and EMI than the RPi ? Or do you think I must also precondition the signal by adding RC filters ?

Also, what is the power consumption of the A16 board (not counting MOSFET outputs of course), so that I can choose the right 12V power supply.

Kind regards,

Vincent

[admin]

1. There is an optocoupler isolation circuit with KC868-A16 digital input ports. You can test.
2. KC868-A16 PCB work current only about 200mA without DC load. suggest use DC12V 2A power supply.

[vdeconinck]

1. There is an optocoupler isolation circuit with KC868-A16 digital input ports. You can test.
2. KC868-A16 PCB work current only about 200mA without DC load. suggest use DC12V 2A power supply.

Thanks for the quick reply.
OK, I ordered a board and will report here.

KR,

Vincent

[vdeconinck]

1. There is an optocoupler isolation circuit with KC868-A16 digital input ports. You can test.
2. KC868-A16 PCB work current only about 200mA without DC load. suggest use DC12V 2A power supply.

Thanks for the quick reply.
OK, I ordered a board and will report here.

KR,

Vincent

Hi,

I promised some feedback, so here it is:
I installed the KC868-A16 with ESPHome in HomeAssistant via Ethernet and it works fine.
I tested for 2 months with very long cables (10m) running from the board inputs near motors, power supplies and other electromagnetic field generators, and I did not get any false alarm. 
So that is great ! I'm continuing the integration.

Kind regards,

Vincent

[admin]

thanks for feedback.