A looooong time ago I presented the MTX-INDv1 here which is a GSM/GPRS industrial modem with DIN rail format.  If we remember, that modem had a Cinterion TC65, therefore it was Java programmable with 400KB RAM and 1.7MB flash. It had 6 opto-isolated digital inputs (2 of which could also be configured as opto-isolated outputs), 2 analog inputs, 4 relays and an input power range of 8-30VDC. This modem also has a USB port and 2 ports which are configurable to RS232/485/422. As seen in the video, you could use an 868MHz Wavecard communications card to communicate with sensors via radio, such as Waveflow (pulse counters), Wavetherm (temperature sensors), WaveSense (sensors 4-20 or 0-5V …).

Nowadays we have the MTX-INDv2 version (the MTX-INDv1 version is still in production), which is the modem that I am going to present to those of you who have not heard of it. This is it in the following picture:

modem gsm gprs IP68

It’s basically the same modem ass a big part of the circuit has the same design as the MTX-INDv1. However it has improvements as it is designed for many scenarios that the MTX-INDv1 could not cover. The following are the MTX-INDv2’s characteristics and options:


-          It is based on the TC65i GSM/GPRS modem. Therefore it is Java programmable and it also has 400KB RAM and 1.7KB Flash. Alternatively, you can be provided with a TC65i-X internal module. It is exactly the same but with 2MB of RAM and 8MB of flash.

-          6 opto-isolated digital inputs ¡ (2 of which can also be configured as opto-isolated outputs)

-          2 analog inputs

-          4 relay 16A

-          USB port

-          2-port RS232/485/422


and here are the main differences:


-          IP68 waterproof box. This is ideal for devices that have to be used outside.

-          Power supply 220VAC or 24VDC. This means that you can connect it directly to a 220V network without needing a current adaptor, although it can also be used with 24V DC voltage.

-          It has a 1600mA internal battery which gives it various advantages. For example, you can use you Java application with 220V and if there is a drop in the voltage an alarm can be sent via SMS.

You have many other options:

-          You can order either a 25mW (1Km scope) or 500mW (4Km scope) Wavecard communication card.

-          You can order Ethernet-Serial converter which allows you to connect to a LAN network.

In short, it is an evolved version of the old MTX-INDv1 modem and it allows for a range of very important outdoor scenarios. Another day I will present the MTX-Remote (a series of 868MHz wireless sensors), and also the IP68. I am sure that they will be of interest for many applications that work seamlessly using the MTX-INDv2 as an 868MHz GPRS-radio communications hub.

For those who are interested, here is the MTX-INDv2 datasheet

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2 Responses to “MTX-INDv2 GSM/GPRS Modem”
  1. JuanK says:

    me gustaria saber si estos modems estan disponibles con antena externa con cable para poder situar la antena en funcion de la cobertura. En la fotografia que pones parece que lleva una antena interna. ¿es posible?

    muy interesante el modem

  2. blogElectronica says:

    Hola Juan,

    sí, este módem lo tienes disponible con Antena externa (gsm). De hecho es extena por defecto.

    La fotografía que ves es del modelo que dispone también de tarjeta de comunicaciones Wavecard interna. Ese modelo dispone de 2 antenas, por defecto internas, una para la parte gsm/gprs (la que ves en la foto) y otra para la parte radio 868, similar en aspecto, que va pegada en la cara opuesta a donde ves la antena GSM.


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