Specifications

Do not mount the GSM Commander inside a steel cabinet, since this will block the cellphone

signal. If you have to mount it inside a steel cabinet, you will need to mount a separate

antenna on the outside of the cabinet. Suitable antennas can be ordered from Polygon

Technologies.

See the “Advanced Technical manual” for detail on how to do this. (Available on the CD

supplied with the product, or on the Internet at: http://www.gsmcommander.com)

5.7. Dimensions

5.8. Optically-Isolated Digital Inputs

The GSM Commander itself provides 2 signal inputs. The number of inputs can be expanded

by the addition of Expansion modules, up to a maximum of 32 inputs*. Each of these inputs

have 4 terminals associated with them:

+ – Internal positive supply (12V)

IN + – Positive input

IN – – Negative input

– – Internal negative supply (Zero volts)

* Model Dependent (See Feature Matrix in Section 2)