Modem User Manual

Installation and Operation Manual: CTM-130 / CTM-132 (Revision 1.2)

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8.1.6 Configure the I/O Operation

The CTM-130/132 modem has 6 user inputs and 4 user outputs. The inputs may be configured for either

digital or analog monitoring – configuration of this and their use to trigger reporting can be set on the

I/O page.

In order to use an input as a report trigger it is necessary to configure it for the desired operation:

First select if the input is a Digital or Analog type - digital inputs are simple On or Off decisions based

on a voltage threshold of 2.5V +/- 0.5 V, while analog inputs have a range of 0 to 10V.

Next select if the input logic is Positive or Negative: for positive logic an analog input voltage greater

than the set threshold or a digital input of greater than 3.0V will be deciphered as On for report

triggering; for negative logic an analog input voltage less than the set threshold or a digital input of

less than 2.0V will be deciphered as On for report triggering.

For analog inputs set the Threshold voltage at which you wish the report to be triggered.

Lastly set the reporting trigger – On, Off, or Change: On will trigger continuous reports while the

input is in the On state; Off will trigger continuous reports while the input is in the Off state; Change

will trigger a single report whenever the input changes state from On to Off, or Off to On.

The 4 digital outputs may be controlled from this page: each output may be set as On or Off to control

equipment that is connected to the CTM-130/132 modem.