Configuring the MP Modem to Report GPS and I/O

Data

A digital input can be connected to four of the pins on the DB15HD connector: Pins 3, 4, 11, and 12. (Pins 3 and 11 could alternatively be used for digital output.)

Note: Before using the input/output lines, you must configure them as inputs or outputs.

Typically a digital input device should be connected between

Ground (Pin 10) and the input port (Pin 3, 4, 11, or 12).

Figure 7-2: A button wired to Pin 4 (digital input) and Pin 10 (Ground).

The pins report a logic high on an input of 3.45 VDC. An internal pull‐up resistor provides a high condition when the switch is open.

The digital input pins report a logic low on an input between 0 VDC and 0.8 VDC. Sinking the input pin to ground yields a logic low (0x00) when the port is polled.

If you configure the MP modem to send data to a network server, digital input data can be remotely monitored.

Example: panic button connections

An I/O cable for a panic button requires a wire to one of the digital input or I/O pins (such as #3) and one wire to the Ground pin (#10).

 

 

 

 

 

 

 

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Image 59
Sierra Wireless MP595W manual Example panic button connections, A button wired to Pin 4 digital input and Pin 10 Ground

MP595W, MP595 specifications

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