How Does MOBITEK S150 Remotely Open and Close Automatic Gate by SMS SMS Command To open the gate: send 1234CC to connect the relay send 1234DD to disconnect the relay To close the gate: send 1234CC to connect the relay send 1234DD to disconnect the relay Steps — Wiring and Configuration Configure S150 in “S130~S150 PC Configurator Ver1.50”. Contractor wire the 1st gate: 1st gate button wiring (open and close gate) Relay Output (1+ & 1-) and; Digital Input (GND & 1). Contractor wire the 2nd gate: 2nd gate button wiring (both sides gate) Relay Output (2+ & 2-) Digital Input (GND & 2)