Power supply interface: Power supply voltage: 9V-36V. When using 9V power supply, the current must be guaranteed 1.0A or above.
Two-channel Relay interface: Using 250V 10A relay, you can directly operate most of the electrical appliances on the market. Two channel supply passive switch signal.
SIM Card Socket: Insert SIM card when system powered off. (In China, please use mobile or Unicom card).
LED interface: There are three LED lights named D3 D6 D7 (D7 is close to the positioning hole, D6 is close to the antenna interface). LED indicator state corresponds to the equipment working conditions are as follows, each column is one state.



SMS Command Instructions:
Before using this device, please send a text message for authorization first. Then you can send a message command to control relay.
 
Authorized Number Configuration:
This system supports up to 3 authorization numbers. Format: *code*# NAuthorized number#, after setup successfully, the device will reply, SMS Content is: User(N) Number:
 
Number is set ok. For example, if system code is 123456, and you want to set the first authorized number is 18846919911, you can send the SMS: *123456*#118846919911# .the device will reply, content is: User1 Number: 18846919911 is set ok! The new authorization number is saved in the device; and you want to set the second authorized number is 18846919900, you can send the SMS:*123456*#218846919900#.the device will reply, content is: User2 Number: 18846919900 is set ok!. The new authorization number is saved in the device.
 
Code configuration: Format: *6 old code number**6 new code number*. After setup successfully, the device will reply, SMS Content is: SYS Code: 6 new code numbers set ok. For example, if system code is 123456, you want to revise the new code is 666666, send the SMS:*123456**666666*. The device will reply, content is: SYS Code: 666666 Set OK. Note that only authorized number can change the code. The new code is saved in the device.
 
The cell phone SMS control.
Relay1 On command: ON1, after successful setup, the device will reply SMS is: REALY1 set on! For example, send the SMS: ON1. Relay status will be saved.
Relay1 Off command: OFF1, after successful setup, the device will reply, SMS Content is: REALY1 set off! Send the SMS: CMOF. Relay status will be saved.
Relay2 On command: ON2, after successful setup, the device will reply SMS is: REALY2 set on! For example, send the SMS: ON2. Relay status will be saved.
Relay2 Off command: OFF2, after successful setup, the device will reply, SMS Content is: REALY2 set off! Send the SMS: OFF2. Relay status will be saved.
System status query instruction: STA. For example, sends the SMS: STA. The device will reply the state of two relay.
 
Default Set:
code: 123456

FAQ:
1. It works for a Fodafone Spain Sim card?
No matter what kind of Sim card Operator is, this 2CH Relay Module work under 2G Network, with frequency 850, 900, 1800 or 1900.
 
2. Can I activate the charge (light or pump or whatever) just calling at the number? I mean, without send a text message.
This 2CH Relay Module could not be controlled by call, Only similar item 1CH and 4CH Relay could be controlled by Call.

Package Included:
- 1 x Set of 2-Channel Relay Module