Jablotron DAVID GD-04 User manual - 11. Optional Accessories
GD-04 DAVID
6
MKS51202_OS1*
dd
is the auto-interrogation frequency in days
hhh
is the minimum acceptable credit balance
pp
is the textual position at which the number showing the balance starts in the
reply message from the GSM provider
Example:
If you require at least 50€ of credit balance, and the USSD code used to query the
available balance is *104# and you want a weekly interrogation frequency, use the following
instruction:
PC, CRD, *104*#, 7, 50, 01
If you do not want automatic interrogation, you can program David to report the balance in
response to your SMS instruction: PC, CRD . The programming is achieved by a programming
instruction according to the following example:
PC, CRD, *104*#, 0, 0, 0
Note:
David’s SIM card balance interrogation may stop working due to changes in GSM
services (e.g. a different response format). You should therefore be acquainted with the
methods your GSM provider uses or will use for querying the available balance.
10. Reset to factory defaults
You can reset David to the factory default settings via the SMS instruction PC, RST, where PC
is a valid access code - see Table 1.
Another option is to use the RESET jumper (next to the SIM case):
a) Turn the power supply off (including the backup module if used).
b) Connect the RESET jumper, turn the power supply on and disconnect the jumper
after about 5s.
Note: Performing a RESET erases all programmed tel. numbers and texts.
11. Optional accessories
David’s functionality can be extended by optional modules or other separately supplied
accessories:
11.1. The GD-04A back-up module
This module is imbedded in a specially-enlarged replacement cover. Installation is performed
by replacing the original cover, together with wiring the GD-04A module to the GD-04 circuit
board via the corresponding connector.
The backup battery requires approx. 72 hours to be fully charged. The battery provides
approx. 12 to 24 hours of backup operation
, depending on the output relay state and on the
GSM signal strength (as with any GSM device, David’s consumption is higher in places with a
low signal level as the transmitter power has to be increased).
Only David’s electronics is backed up
. No voltage is available on the +12V terminal
during backup operation.
Discharging the battery causes David to be switched off (including the X and Y relays). After
the recovery of the main power supply David will switch on (but the relays stay switched off) and
starts charging the battery. The message POWER FAIL or POWER RECOVERY is sent to the
service number (STN).
11.2. The GD-04D DTMF module
The GD-04D allows relay X and Y control by entering numeric codes (DTMF codes) on the telephone
keypad during calls. The DTMF codes intended for use have to be programmed, see table 1.
The module can be installed by plugging in to the appropriate digital bus connector after the
power supply has been disconnected.