GD-04 DAVID
MKS51200_OS1
3
4. Wiring
1.
Power supply
– use the +12V and GND terminals. Any power supply adapter used should
provide 12V DC voltage and up to 500mA of current. If an LT-89 mains adapter is used (a
recommended option) wire the grey marked conductor to GND. Do not turn the power supply
on until all input/output wiring has been done.
12V DC
power supply
(
adapter)
LT-89
_
+
2.
Output relay contacts
– available at the X1+X2 and Y1+Y2 terminals. Each contact is fused
to 5A. The circuits which the contacts belong to are protected from the remaining electronics
by a safety separator and are capable of switching up to 5A at 250V AC. The following
example shows a light bulb control via the Y output relay:
230V/50Hz
Light bulb
3.
Input terminals
– marked A to D. The terminals respond to a connection or disconnection to
or from GND by sending an SMS report. No external voltage supply can be connected to
these terminals – they can only be controlled via a potential-free switch/contact. Example of
wiring a switch to input A:
Switch
5. Initial powering up
1.
Turn the power supply on
, registering to the GSM network is indicated by the LED flashing
(if no indication occurs, check the power supply wiring)
.
2.
After GSM registration the LED stops flashing
(usually within 1 minute).
Continued flashing
indicates a GSM registration fault. Disconnect the power supply and check that a valid SIM card
has been correctly installed into the device, see 2 and 3).
3. Send the SMS instruction
STATUS
to David’s SIM card number.
4.
David responds by a status report
,
e.g.
STATUS: A0,B0,C0,D0,X0,Y0,GSM:80%
(which
means that all A to D inputs and both the X and Y relays are switched off and that the GSM
signal strength is 80%). Depending on the GSM network traffic the response may take some
time.
If no response occurs, verify that “STATUS” is spelt exactly right in the text of the
message and that you are sending the message to David’s correct SIM card number (repeat
the previous step).
