GD-04 DAVID
MKS51200_OS1
1
The GD-04 “David” GSM communicator
User manual
The GD-04 module got its name from David, a biblical king who outsmarted Goliath, a giant. In our
case, Goliath is meant to be the GSM network. We hope that the skills of your tiny David will help you
manage the giant.
1. Basic
description
SI
M
Bus connector
Battery connection
LED indicator
RESET jumper
GSM antenna
Tabs
SIM card
Output fuses
1.1. David
provides:
•
2 output contacts
of power relays X and Y (each allows up to 5A/250V)
•
4 input terminals
A to D for SMS reporting (the inputs react to a connection or disconnection
to or from a common GND terminal)
