Signal LED:
If the LED flashes once every 1 second, this indicates the cellular network cannot be
found (out of GSM coverage range). Remedy = Re-locate the device or use a longer
aerial or signal booster.
If the LED flashes once every 3 seconds, this indicates the cellular network has been
found (all ok).
Electrical Specifications:
Ezy Switch Ltd
System
Ezy Switch SMS-T4 Installation & Operation
Manual
SIM Card
Supply Voltage
Quiescent Current
Data Retention
Outputs
Max Input voltage
12 to 30 Volts DC @
800mA
40 Milli-amps
10 years (without power)
Relay = 3 A resistive @ 125VAC
30vdc
SMS-T4 Terminal Electrical Connections
Terminal 1 = Batt +
Terminal 2 = Batt - (also sensor GND)
Terminal 3 = +5vdc supply for sensor Terminal 7 = Ouput 1
Terminal 4 = Variable voltage in from sensor Terminal 8 = Output 1
Terminal 5 = Input 1
Terminal 9 = Output 2
Terminal 6 = Input 1
Terminal 10 = Output 2
Terminal 11 = Input 2
Terminal 15 = Ouput 3
Terminal 12 = Input 2
Terminal 16 = Output 3
Terminal 13 = Input 3
Terminal 17 = Output 4
Terminal 14 = Input 3
Terminal 18 = Output 4
Signal LED
SIM Card
Terminal 1
Terminal 10
Terminal 11
Terminal 18
Terminal 3
