GUADARRAMA FLOW MAI3H Pulse Converter and Divider Module User Manual

GUADARRAMA FLOW MAI3H Pulse Converter and Divider Module

Product Information

Specifications

• Product Name: Pulse divider and converter MAI3H
• Main Function: Convert pulses from a flowmeter or any other source into a readable format for PLC or other electronics
• Maximum Frequency: 2,000 Hz
• Pulse Input Types: Various mechanical flowmeters (Turbine, Oval Wheels, etc.) or any other source
• Pulse Output Types: Adjustable output frequency

General Information
The MAI3H module is an electronic device designed to be mounted on a DIN rail. Its main function is to convert pulses from a flowmeter or any other source into a readable format for PLC or other electronics. The module is very robust and does not have a microprocessor, ensuring that its configuration is not lost. The configuration is stored using 4 mechanical rotary switches.

Pulse Input Types
The MAI3H module supports various pulse input types with a maximum frequency of 2,000 Hz.

Pulse Output Types
The module provides adjustable output frequency based on the input pulses.

Main Applications
The main application of the MAI3H module is to modify pulses so that they can be read by PLC or other electronics. Some common applications include:

• Flowmeter pulse conversion for open collector or relay input
• Modifying pulse output frequency for different resolutions of the flowmeter

Electrical Connection
Refer to the user manual for detailed instructions on electrical connection.

Output Frequency Adjustment

Introduction
The output frequency adjustment feature allows you to fine-tune the module’s output to match the desired pulse/liter value.

Adjustment
To adjust the output frequency, follow these steps:

1. Identify the desired pulse/liter value.
2. Use the rotary switches to enter the decimals of the inverse value of the input pulses.
3. Depending on the desired output frequency, use the linear switch to divide the input frequency.
4. Test and verify the output frequency using appropriate measurement tools.

General information

The MAI3H module is an electronic device to be mounted on a DIN rail, whose main function is to convert the pulses coming from a flowmeter, generally mechanical (Turbine, Oval Wheels, etc.) or from any other source into:

Modified Pulses
Pulses are modified by:

• Decrease in frequency (pulses/liter)
• Modification of pulse type

This module is very robust, since it does not have a microprocessor where it stores its factor, it does so using 4 mechanical rotary switches, so it has no possibility of losing its configuration.

Pulse input types
The MAI3H module supports a wide variety of pulse types:

• 3 wires
  • NPN
  • PNP
  • Reed

With a maximum frequency of 2.000 Hz

Pulse output types
The MAI3G generates 2 different types of pulses:

• Open collector output (Transistor)
• Relay (Maximum frequency: 10 Hz)

Main applications
As mentioned in the previous section, the main application of the MAI3H is to modify the pulses so that they can be read by any PLC or other electronics.

The most frequent cases are:

• PLCs that do not accept a specific type of pulse, so it is necessary to transform them into pulses that are easier to read, such as open collector or relay pulses.
• PLCs that do not accept a very high frequency of pulses or that, to accept them, need to install a special fast card that usually has a high cost.
• PLCs that require a fixed pulse frequency per liter. This type of equipment is usually small electronic devices that calculate the energy of a liquid stream and, normally, they need a frequency multiple or submultiple of 1 pulse/liter, that is:
  • 100 pulses/liter
  • 10 pulses/liter
  • 1 pulse/liter
  • 1 pulse/10 liters
  • 1 pulse/100 liters, etc.

Electrical installation

MAI3H elements
The main elements of the MAI3H are shown in the next picture:

A. Rotary switches
They are used to adjust the output frequency until a multiple or submultiple value of 1 pulse/liter is reached. The values that must be entered into these switches are the decimals of the inverse value of the input pulses.

As an example:

• Suppose that the flowmeter has a frequency of 34.62 pulses/liter.
• Its inverse value is 0,02888 (1/34,62)
• The following values must be entered into the Rotary Switches (A):

B. Linear Switch
It is used to divide the input frequency. This switch has 4 positions that, starting from the top, produce the following results in the output frequency:

• C1
  It does not alter the frequency (pulses/liter) of the input, that is, it does not take into account the Rotary Switches (A). It is used when you want to maintain the maximum resolution of the flowmeter, but it is necessary to modify the type of pulse to open collector or relay.

• C2
  It takes into account the division produced by Rotary Switches (A) without further dividing the output frequency produced by them.

• C3
  It takes into account the division produced by Rotary Switches (A) and divides the output frequency produced by them by 10.

• C4
  It takes into account the division produced by Rotary Switches (A) and divides the output frequency produced by them by 100.

C. Pulse input board
This small electronic board is removable. It’s in charge of the 3-wire pulse input.

D. Fuse
Its function is to protect the module.

E. Power supply
The MAI3H module requires a 24 Vdc power supply in positions 9 (negative) and 10 (positive) of the terminal blocks.

F. Pulse input
The Pulse input can be:

• 3 wires (Hall, PNP, etc.):
  • 1 – Negative
  • 2 – Pulse
  • 3 – Positive

G. Pulse Output
The MAI3H module features 2 different types of pulse outputs:

• Open collector pulses:
  • NPN Connection
  • 4 – Output
  • 8 – Negative
  • PNP Connection
  • 4 – Positive
  • 8 – Output
• Relay Pulse – Positions 6 and 7 of the terminal blocks.

Electrical connection

This section shows some of the possible connections that can be made with the MAI3H module.

• IT IS ESSENTIAL THAT THE SIGNAL CHANNELING BE COMPLETELY INDEPENDENT FROM THE POWER CHANNELING.
• THE HOSE MUST BE 3 WIRE AND MESH. CONNECT THE MESH TO GROUND ONLY AT ONE END.
• MAXIMUM DISTANCE BETWEEN AMPLIFIER AND FLOWMETER 100 METERS

Output frequency adjustment

Introduction
The MAI3H module is configured at the factory according to the customer’s requirements:

• Input pulses:
  Type of pulse and frequency of the flowmeter (Pulses/liter).

• Output pulses:
  Type of pulses and maximum frequency (Hz) that the PLC supports.

For this reason, the customer does not need to modify the configuration of the supplied MAI3H module in most cases. However, if the customer wants to change the parameters of the module, he has to keep in mind that the output frequency:

• It is always less than or equal to that of the input.
• It can only have a value that results from dividing the input frequency by:
  • 10 or powers of 10.
  • The same value of the input frequency or this value divided by 10 or powers of 10.

The best way to clarify this matter is through an example. Let’s assume that the inlet flowmeter has a frequency of 28.75 pulses/liter. The MAI3H module can generate an output frequency of:

• 28,75
  pulses/liter

• 2,875
  pulses/liter

• 0,2875
  pulses/liter, etc. o

• 10
  pulses/liter

• 1
  pulse/liter

• 0,1
  pulse/liter

Adjustment

To adjust this output frequency, you must act on the Rotary Switches (A) and linear Switches (B) following the following procedure:

1. Take the frequency (pulses/liter) of the flowmeter and calculate its inverse value.
2. Enter the non-zero decimals of this inverse value into the Rotary Switches (A) starting from the left.
3. Jumper the Linear Switch (B) to the corresponding position depending on the frequency you need.

Again, the best way to clarify this procedure is with an example. Let us assume the previous case, a flow meter with a frequency of 28.75 pulses/liter:

1. The inverse value is 0,03478
2. Enter:
   • 3 in the first rotatory switch (A) from the left,
   • 4 in the second
   • 7 in the third
   • 8 in the fourth
3. Depending on the Linear Switch (B) you bridge, different results can be obtained.:

Linear Switch (B)

bridge

| Output Frequency

Pulses/liter

---|---
C1| 28,75
C2| 10
C3| 1
C4| 0,1

Contact

For any problem you may encounter or service you need, do not hesitate to contact the G-Flow offices.

• Telephone : +34 916378174 / +34 916378175
• E – mail : [email protected]
• Address : Calle Justina Velasco Martín 2, Pol. Ind. Los Llanos 28260 Galapagar Madrid.

Office____
Laboratory__
Factory____

FAQ’S

What is the maximum frequency supported by the MAI3H module?

The MAI3H module supports a maximum frequency of 2,000 Hz.

What are the applications of the MAI3H module?

The main applications include converting flowmeter pulses for PLC or other electronics, modifying pulse output frequency, and maintaining the maximum resolution of the flowmeter.

How does the output frequency adjustment work?

The output frequency adjustment is done through the rotary switches and linear switch. The rotary switches are used to adjust the output frequency to a multiple or submultiple value of 1 pulse/liter, while the linear switch is used to divide the input frequency.

References

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