IFM SI5011 (01) PDF Document

The IFM SI5011 is a subcomponent for integration into a system. The system architect is responsible for the safety of the system and must perform a risk assessment and create documentation for the operator and user.

Please adhere to the following safety instructions:

• Read the operating instructions before setting up the product and keep them for the entire service life.

• The product must be suitable for the corresponding applications and environmental conditions without any restrictions.

• Only use the product for its intended purpose, which is monitoring flow in liquid and gaseous media.

• Only use the product for permissible media.

• Failure to adhere to operating instructions or technical data may result in personal injury and/or property damage.

• Installation, electrical connection, set-up, operation, and maintenance must be carried out by qualified personnel authorized by the machine operator.

• Protect the unit and cables against damage.

The IFM SI5011 detects flow based on the calorimetric measuring principle and switches the output accordingly. At the factory setting, the switch point is at LED 7, and the device is set to normally open. The output can be switched to a normally closed function. The switch point LED indicates the switching status:

• Orange: output closed

• Red: output open

With normal flow (flow ≥ switch point), the output status is:

• Output closed for normally open function.

• Output open for normally closed function.

If the flow velocity decreases and falls below the switch point minus the hysteresis, the switching status changes. The typical response time is 1 to 10 seconds and is influenced by the switch point setting:

• Low switch point: quick reaction with rising flow.

• High switch point: quick reaction with falling flow.

When installing the IFM SI5011, please observe the following precautions:

• During installation or in case of mechanical failure, high pressure or hot media can leak from the system, posing a risk of injury from pressure or burns.

• Ensure the system is free of pressure during installation.

• Ensure no media can leak at the mounting location during installation.

Immersion Depth:

• The sensor tip must be completely surrounded by the medium.

• The recommended minimum immersion depth is 12 mm.

Recommended Mounting Position:

• For horizontal pipes: mount from the side.

• For vertical pipes: mount in the rising pipe.

Conditionally Possible Installation Position:

• For horizontal pipes, if the pipe is free from build-up: mounting from below.

• For horizontal pipes, if the pipe is completely filled with medium: mounting from the top.

Impermissible Installation Position:

• The sensor tip must not be in contact with the pipe wall.

• Do not mount in downpipes that are open at the bottom.

Structures in the pipe, such as bends, valves, and reducing pieces, can affect the function of the IFM SI5011. Adhere to the following distances between the sensor and any interference:

• Inlet pipe length (before the sensor): 5 to 10 times the outside diameter of the pipe (5…10 x D).

• Outlet pipe length (after the sensor): 3 to 5 times the outside diameter of the pipe (3…5 x D).

To connect the IFM SI5011 using a process adapter, follow these steps:

1. Grease the threads of the process connection, adapter, and sensor. Use a lubricating paste that is suitable and approved for the application. Ensure no grease is applied to the sensor tip.

2. Screw the suitable adapter into the process connection.

3. Place the flow monitor onto the adapter and tighten the nut. Use a tightening torque of 25 Nm. Ensure that the unit is correctly oriented.

The IFM SI5011 must be connected by a qualified electrician, observing national and international regulations for electrical equipment installation. The voltage supply must be according to SELV, PELV. Disconnect power before connecting.

The pin assignments are as follows (colors to DIN EN 60947-5-2):

Important Note: Only use 4-wire sockets without a bridge between pin 2 and pin 4. If a 3-wire socket with a bridge between pin 2 and pin 4 is used, powering on the output stage will trigger the remote calibration.

The IFM SI5011 has two main display and operating elements:

1. Operation indication (LED bar graph):

• The LEDs 0…9 represent the range between flow standstill and maximum flow.

• The green LEDs show the current flow.

• An illuminated LED (orange or red) shows the position of the switch point:

• Orange: output closed

• Red: output open

2. Setting buttons:

• These buttons are used for adjustment and configuration of the device.

1. Switch on the supply voltage. All LEDs will light up and go out again step by step. During this time, the output status will be consistent with its setting (closed if normally open, open if normally closed).

2. The device will then enter operating mode.

3. Let the normal flow circulate in the installation.

4. Check the display and determine the next actions based on the table below.

For media other than water, an additional low-flow adjustment should be carried out after the high-flow adjustment.

Changing the switch point from the factory setting (LED 7) is recommended if the normal flow is outside the display’s representation range, if the flow fluctuates strongly, or if a faster response time is needed.

1. Briefly press the [<] or [>] button. The switch point LED will flash.

2. Press the [<] or [>] button as often as required. Each press shifts the LED by one position in the indicated direction.

3. When the required switch point is reached, do not press the button for more than 2 seconds.

4. The device will go into operating mode with the newly set value.

High-flow adjustment:

1. Let the normal flow circulate in the installation.

2. Press the [>] button and keep it pressed.

3. LED 9 will turn on. After approximately 5 seconds, it will flash.

4. Release the [>] button.

5. The device adapts to the new flow conditions and returns to operating mode. The switch point is increased proportionally (up to a maximum of LED 7).

Low-flow adjustment (for media other than water):

Important: Carry out the high-flow adjustment before the low-flow adjustment.

1. Let the minimum flow circulate in the installation or ensure flow standstill.

2. Press the [<] button and keep it pressed.

3. LED 0 will turn on. After approximately 5 seconds, it will flash.

4. Release the [<] button.

5. The device adopts the new value and returns to the operating mode.

The IFM SI5011 is delivered set to normally open. To change to a normally closed function:

1. Press the [<] button for at least 15 seconds.

2. LED 0 will turn on. After approximately 5 seconds, it will flash.

3. After 10 seconds, the current setting is displayed: LEDs 5…9 will light up orange (indicating normally open).

4. After approximately 15 seconds, LEDs 0…4 will flash orange.

5. Release the [<] button.

6. The output is now changed to the normally closed function. To change it back, repeat the operation.

To reset all settings to the factory default:

1. Press the [>] button for at least 15 seconds.

2. LED 9 will turn on. After approximately 5 seconds, it will flash.

3. After approximately 15 seconds, LEDs 0…9 will flash orange.

4. Release the [>] button.

All settings are reset to the factory setting:

• Operating range: 5…100 cm/s for water

• Switch point: LED 7

• Output function: normally open

• Not locked

The unit can be locked electronically to prevent unauthorized changes. The factory setting is “not locked.”

To lock:

1. Press both setting keys simultaneously for 10 seconds.

2. The display will go off, indicating the unit is locked.

To unlock:

1. Repeat the process by pressing both setting keys for 10 seconds.

The remote setting function allows adaptation to new flow conditions at any time. The relative switch point is not shifted. Be sure to observe the time frames for the input signal on pin 2 to avoid unintentional actions.

High-flow adjustment:

1. Let the normal flow circulate in the installation.

2. Apply Ub+ to pin 2 for a duration of > 5 seconds and < 10 seconds.

3. LED 9 will turn on, and after approx. 5 seconds, it will flash.

4. Disconnect the voltage from pin 2. The device adapts to the flow and enters operating mode.

Low-flow adjustment:

1. Let the normal flow circulate in the installation.

2. Apply Ub+ to pin 2 for a duration of > 10 seconds and < 15 seconds.

3. LED 0 will turn on, and after approx. 5 seconds, it will flash.

4. Disconnect the voltage from pin 2. The device adapts to the flow and enters operating mode.

Restore factory settings:

1. Apply Ub+ to pin 2 for > 15 seconds.

2. LED 9 will turn on, and after approx. 5 seconds, it will flash. After approx. 15 seconds, LEDs 0…9 will flash orange.

3. Disconnect the voltage from pin 2. All settings are reset to the factory default.

During operation, the IFM SI5011 displays the current flow and the switching status. The following table explains the display for a normally open function with the switch point set at LED 4.

Note: In case of a power failure, all settings remain saved.

Only the manufacturer is allowed to repair the unit. To ensure proper function, the sensor tip must be free from build-up.

• Check the sensor tip for build-up one month after initial set-up.

• Repeat this check regularly. Determine the check intervals based on your specific application.

• In case of soiling, clean the sensor tip with a soft cloth.

• Stubborn build-up, such as lime, can be removed using a common vinegar-based cleaning agent.

After use, dispose of the device in an environmentally friendly way in accordance with applicable national regulations.