Specifications

Each of these inputs each have 3 terminals associated with them:

COM – Common Terminal

N/C – Normally Closed Terminal

N/O – Normally Open Terminal

When the output is off, the COM and N/C terminals will be internally connected to each other.

When the output is on, the COM and N/O terminals will be internally connected to each other.

Note that there are small LED indicators next to the output terminals, that will show if the

output is ON or OFF. (if the LED is on, then the output is also on)In the picture below, the

output is connected so that the lamp will light up when the output is on.

This output can be used to control devices and appliances, and is rated for 8A DC. It may be

used to control most types of electrical loads, excluding AC motors above 500W.

Here are some examples of things you CAN directly switch on and off using the outputs on the

GSM Commander:

• Gate motors and any other motor less than 500W

• Mains Lights (energy savers, incandescents, halogens) (maximum 750W)

Here are some examples of things that you can NOT directly switch on and off using the

outputs on the GSM Commander:

• Ovens, Heaters, kettles

• Pumps and motors above 500W

Keep in mind that if required, the above loads can easily be switched on and off using an

externally connected relay or contactor.

5.10. Temperature Sensor

One can connect 2 temperature sensors to the GSM Commander (at the expansion port via a

temperature interface module) to measure temperature and allow the GSM commander to

perform certain tasks if the temperature falls above or below a certain point. The sensor

provides an accuracy of 1°C, and can only measure temperatures between 0-100°C.

The temperature sensor (with 2m or 4m lead) and temperature interface is available from

Polygon Technologies. (Part no: GT001-1 OR GT001-2 and GT002).