4 channel DTMF MT8870 Audio Decoder Controller
Everything you ever wanted to know but were afraid to ask!
Below is all the information we were able to find regarding this controller and how to program.
If you have more information and would like to share with me, please send email at: vo1mds@hotmail.com
The information provided below is from various sources all around the internet, the information below is not to be classified as 100% correct, because i have not yet had the chance to test any of this information on the DTMF controller that i have purchased.
Once i know more about this DTMF controller and how it works, i will do my best to update this webpage.
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Until then, the information presented here is simply as reference material only and nothing more.
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Description: Features:
Functional characteristics:
1 Product model: AD22B04
2.working voltage DC 12V, with reverse polarity protection
3.Operating Current: Standby 11-13 MA, 1 relay 'open' 44MA, 2 relays 'Open' 77MA, 3 relays 'Open' 110MA, 4 relays'open' 140MA
4 eight modes of operation:Non-locking (Momentary ), self-locking (Toggle),inter-locking (Latch), 5/20/60/120/250-second delay
5 The default control command is 1/2/3/4.Example: Dial 1 to control relay 1, dial 2 to control relay 2, dial 3 to control relay 3, dial 4 to control relay 4; control commands can be changed any 1-4 bits. (For more details, refer to ' AD22B04_4 channel DTMF controller commands setting manual ').
6 Size: 50 * 80 * 19.5mm
7 Weight: 59 grams
8 Maximum load: 10A / 250VAC, 10A / 125VAC, 10A / 30VDC, 10A / 28VDC, 10A / 12VDC
Use Instructions:
This is the DTMF audio controller with four channels, any phone or fixed telephone with DTMF key code remotely controls product relay 'open' and 'close'.(the majority of smartphones and functions machine are DTMF code). Our software 'DTMF Dial' (installed in a computer) can be also provided to control relays.
You can swap phone's for radio's
As shown above, by phone remote control relay. You need two phones, one as a receiver (phone_1), the other one as a transmitter (phone_2); mobile phone_1 connected by DTMF audio cable 3.5MM audio controller (the controller to be powered), and then using phone_2 ( may be a fixed telephone) call the phone_1, phone_1 answered, so that two phone call each other; then dial 1/2/3/4 by phone_2 keypad to control four relays .
1 DTMF audio controller must use stable work of DC 12V power supply (recommendations 1A or above the power adapter)
2 remote control the controller by a mobile phone, the receiver must be the phone with 3.5MM audio interface, the transmitter can be a cell phone or landline.
3 as a receiver of the phone or a computer installed the 'DTMF Dial' software must output a sound (not muted), or they will not control relays.
Glossary:
NO: Normal open
COM: Common terminal
NC: Normal Connect
Relay open: COM connected NO but disconnected NC
Relay close: COM disconnected NO but NC connected COM.
Non-locking (Momentary ): Dial 1 (2/3/4 is the same), relay 1 'Open', relay close after 1 second delay
Self-locking: Dial 1, relay 1 'Open', dial 1 again, relay 1 'off', and so on
Inter-lock: Dial 1, relay 1 'Open', other relays 'Off'; dial 2, relay 2 'Open', other relays 'off', and so on
'Delay': Dial 1, relay 1 'Open', relay 1 'Close' after a time
Mode selection:
