Ambitrol 500

Ambitrol 500

Complete environmental parameter controller

existing in multiple facilities such as farms,

greenhouses, dryers, cold rooms, etc..,

expandable with additional cards.


Ambitrol 500


The Ambitrol 500 is a complete electronic system for the automatic control of existing environmental parameters in multiple facilities 

The system consists of a central unit with 80-character illuminated alphanumeric display and keyboard, plus one or more satellite input/output units, equipped with different boards according to requirements, which can be located hundreds of metres from the central unit.

Due to its "configurable" condition, it can control an infinite number of sensors for temperature, relative humidity, harmful gases, wind direction and speed, luminosity, solar radiation, levels, counters, return messages, etc.; as well as acting on multiple windows, fans, heaters, refrigerators, humidifiers, irrigation, alarms, lighting, engines, water and feed dispensers, etc.

One of the advantages of being "configurable" is that with a single piece of controller any type of installation can be completely controlled: have one or more facilities, raise one or more types of animals (on farms), and so on.

Each of the controls to be carried out is configurable in the inputs, outputs, type of action, conditioning factors, reference values, differential, alarms, etc.

References can be programmed manually (modifying them personally each time it is necessary) or following curves preset by the user himself once and which are automatically modified with the passage of time, as planned.

The incorporation of preset performance curves gives great agility to those controls in which the references must be changed periodically.

In the system memory the values and other useful information of the control are registered, being able to visualize them by screen and to list them by printer in the form of graphs of behavior.

The Ambitrol 500 is composed by:

Ambitrol 500
Central Unit

Monitor with 80 character illuminated alphanumeric display and keypad.

Ambitrol 500
Modular input/output unit

Equipped with different boards according to needs.

FeaturesThese are the available features of the controller

Riego hidroponia


The controller has capacity for 40 programs

We call program to a very complete order of action that is prefixed in the controller for its automatic execution.

The programs are identified with an order number and with a descriptive text of the control they carry out, to be chosen by the user himself, such as for example "Heating 4".

Each program is configurable in its inputs, outputs, conditioning factors, reference and differential values, curves, maximum and minimum alarms, types of actuation, registers, etc.

There is the possibility of using a private numeric code that prevents those who do not know it from changing program data.



Each program can read from one to three probes (if there are more than one, apply the average).

A program usually needs to read from a sensor located in the installation in order to compare this value with the preset and thus act on the corresponding output.

The same sensor can also be read by several programs.

The controller has capacity for 64 sensors (analog inputs), 8 pulse counters and 24 for conditioning elements (digital inputs).

Using the keypad, the sensors can be calibrated. It is also possible to assign a value to the feedback pulses to be received.

The units of measurement that can be controlled by the controller, by means of the corresponding sensors or counters, and the abbreviation of which appears on the screen are:

Temperature ºC, hum. relat. RH%, illumination Klx, ratio %, speed m/s, direction º, acidity pH, radiation W/m2, units Uds, pressure Psi, flow m3/h, flow l/h, anhi.Carb. CO2, NH3 ammonia.



All programs have an output

A relay output (which it only activates or deactivates) or analogue output (which, when it activates it, it does with a lower or higher voltage depending on the difference between the value read by the probe and the one preset in the program). 

Some types of programs can also be assigned an auxiliary output that is usually common to several programs.

The analog value of the outputs is from 0 to 10 V and corresponds to the 0 to 100 % output value that will be indicated on the screen. (It is also possible to work with inverted signal from 10 to 0 V). Minimum and maximum output voltage limits can be provided for, for example, speed controllers that need to work from 2 to 8 volts, etc.

The maximum number of analog outputs is 32 and the maximum number of relays is 64.


However, a program may not be assigned an operating output but may be used to condition other programs when certain circumstances occur.

For example, when an excess of wind must modify the performance of one or more programs that control windows, or when it is necessary to condition the reading of a sensor to a certain time.

Any program can be "conditioned" by four others (2 run and 2 stop) and, in turn, be a "conditioner" of the others.

It can also be conditioned by one of the digital inputs (to connect external security elements to the controller, for example).



References, in general, are those reading values from which we want to activate or deactivate an output.

We call differential or proportional band to the difference in value desired between the opening and closing of an output, or vice versa.

References can be programmed manually (modifying them personally each time it is necessary) or following curves pre-set by the user himself once and which are modified automatically with the passage of time, as planned. Other values such as differential, maximum alarm and minimum alarm can also be preset in the curves.



Maximum and minimum alarm values can also be preset for each program to detect faults or other problems in the facilities and auxiliary elements they control.

These values are constantly added (maximum) and subtracted (minimum) from the reference and differential of the program and, if the controlled value exceeds the maximum or minimum for a period longer than a preset time, an output is activated to which an acoustic, luminous, telephone or radio warning device can be connected.

Lectura acumulados


The controller has a record of the last 15 incidents occurred in the installation, which we call anomalies, which memorizes the alarms produced, power cuts, etc..

The history is a statistical record of the last seven days for each of the programs.

Among other data, it indicates day by day the hours that the output has been activated (if it is by relay) or the average of the percentage of the value of the output (if it is analogical), as well as the average reading of the sensor, the highest and the lowest. Also the consumption of water, feed, fertilizer, etc.

Any program that has sensors in the inputs can store a record in memory (up to a total of 14 records in version 501, up to 32 in version 502 and up to 25 in version 503) to print it periodically in the form of graphical curves (one curve for the actual value read by the sensor and another for the expected reference).

Tecla Con


By using a simple key, called consult, it is possible to examine program by program:

The current day and time, if the program is in alarm, the recorded anomalies, the value of the parameters controlled by the probes, the state of the outputs with all their details, the time remaining to conclude an action in the hourly programs, etc.



Model 501, with capacity for 40 programs, 14 of which can be recorded graphically in both their actual and predicted values.

Model 502, with capacity for 36 programs, 32 of which can be recorded graphically at their actual values.

Model 503, with some variants of the model 501, such as, for example, the ability to work with day/night references.

Model 510, to take advantage of the economic advantages of the electric tariff "5" or seasonal.


The controller is powered at 220 Vac and goes through the 24 Vac outputs, incorporating a 6 A transformer.

Version with 12 Vdc inputs and outputs.


The Ambitrol 500 complies with the CE marking directives.

The products manufactured by Progrés enjoy a guarantee of two years against any manufacturing defect.

Compensation for direct and indirect damage caused by the use of the controller is excluded from the guarantee.

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