IFM SI5100 (01) PDF Document

The IFM SI5100 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 with all necessary information and safety instructions for the operator and user.

Please adhere to the following safety guidelines:

• Read the operating instructions before setting up the product and keep it during 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 (monitoring flow in liquid and gaseous media).

• Only use the product for permissible media.

• If the operating instructions or the technical data are not adhered to, personal injury and/or damage to property may occur.

• The manufacturer assumes no liability or warranty for any consequences caused by tampering with the product or incorrect use by the operator.

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

• Protect units and cables against damage.

The IFM SI5100 detects flow based on the calorimetric measuring principle and switches the output. The factory setting for 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 for a closed output and red for an open output.

With normal flow, the output has the following status:

• Output closed for normally open function (Flow ≥ SP)

• Output open for normally closed function (Flow ≥ SP)

If the flow velocity decreases, the switching status changes when the value falls below the switch point (SP) minus the hysteresis.

• The hysteresis changes with the flow velocity. For the factory setting of 5…100 cm/s, it is 2…5 cm/s, and it increases with higher flow velocities.

• The typical response time is 1-10 seconds, influenced by the switch point setting:

• A low switch point results in a quick reaction with rising flow.

• A high switch point results in a quick reaction with falling flow.

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 that the system is free of pressure during installation.

• Ensure that 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 unit. To mitigate this, 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).

The IFM SI5100 can be adapted to different process connections using process adapters. A correct fit and ingress resistance are only ensured using ifm adapters.

Step 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.

Step 2. Screw the suitable adapter into the process connection.

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

The unit must be connected by a qualified electrician, observing national and international regulations for electrical equipment installation. The voltage supply should be according to SELV, PELV.

Step 1. Disconnect power.

Step 2. Connect the unit using a 4-wire socket (without a bridge between pin 2 and pin 4).

Pin Assignment:

Important Note: If 3-wire sockets with a bridge between pin 2 and pin 4 are used, powering on the output stage will trigger the remote calibration.

The IFM SI5100 features two main components for operation and display:

1. Operation Indication (LED bar graph):

• The LEDs numbered 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:

• Two buttons, labeled [<] and [▷], are used for adjustment and configuration.

Step 1. Switch on the supply voltage. All LEDs will light up and go out step by step. During this time, the output will be closed if set to normally open, and open if set to normally closed. The device then enters operating mode.

Step 2. Let the normal flow circulate in the installation.

Step 3. Check the display and determine further actions based on the following table:

For media other than water, an additional Low-flow adjustment should be carried out.

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

• Low switch point = quick reaction with rising flow.

• High switch point = quick reaction with falling flow.

Follow these steps to adjust the switch point:

Step 1. Briefly press the [<] or [▷] button.

– The switch point LED flashes.

Step 2. Press [<] or [▷] as often as required to move the switch point. Each press shifts the LED by one position.

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

– The device will save the new value and return to operating mode.

This procedure adapts the device to the normal flow conditions of the installation.

Step 1. Let the normal flow circulate in the installation.

Step 2. Press the [▷] button and keep it pressed.

– LED 9 turns on. After approximately 5 seconds, it will flash.

Step 3. Release the [▷] button.

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

If the device is used in media other than water, it should be additionally adapted to the minimum flow. Note: Carry out the high-flow adjustment before the low-flow adjustment.

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

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

– LED 0 turns on. After approximately 5 seconds, it will flash.

Step 3. Release the [<] button.

– The device adopts the new value for minimum flow and returns to the operating mode.

Upon delivery, the device is set to normally open. To change it to normally closed:

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

– LED 0 turns on. After approx. 5 seconds, it flashes.

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

– After approx. 15 seconds, LEDs 0…4 flash orange.

Step 2. Release the [<] button.

– The output is now changed to the normally closed function.

To change back, repeat the operation.

To reset all settings to the factory default:

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

– LED 9 turns on. After approx. 5 seconds, it flashes.

– After approx. 15 seconds, LEDs 0…9 flash orange.

Step 2. 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 electronically locked to prevent unauthorized setting changes. The factory setting is “not locked”.

To lock the device:

Step 1. Press both setting keys ([<] and [▷]) simultaneously for 10 seconds.

– The display goes off.

– The unit is now locked.

To unlock the device:

Repeat the process. Press both setting keys for 10 seconds until the display reappears.

Remote calibration allows the device to be adapted to new flow conditions using an external signal on pin 2. The relative switch point is not shifted. Note: Observe the time frames for the input signal exactly to avoid an unintentional reset.

High-flow adjustment:

Step 1. Let the normal flow circulate in the installation.

Step 2. Apply Ub+ to pin 2 for more than 5 but less than 10 seconds (> 5…< 10 s).

– LED 9 turns on. After approx. 5 seconds, it flashes.

Step 3. Disconnect the voltage from pin 2.

– The device adapts to the flow conditions and enters operating mode.

Low-flow adjustment:

Step 1. Let the minimum flow circulate in the installation.

Step 2. Apply Ub+ to pin 2 for more than 10 but less than 15 seconds (> 10…< 15 s).

– LED 0 turns on. After approx. 5 seconds, it flashes.

Step 3. Disconnect the voltage from pin 2.

– The device adapts to the flow conditions and enters operating mode.

Restore factory settings:

Step 1. Apply Ub+ to pin 2 for more than 15 seconds (> 15 s).

– LED 9 turns on. After approx. 5 seconds, it flashes.

– After approx. 15 seconds, LEDs 0…9 flash orange.

Step 2. Disconnect the voltage from pin 2.

– All settings are reset to factory defaults.

The following table explains the display indications for a normally open function with the switch point set at LED 4.

Note: For a normally open function, LED orange indicates output closed; LED red indicates output open.

To ensure proper operation, the sensor tip must be free from build-up.

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

• Repeat the 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 cleaning agent.

Only the manufacturer is allowed to repair the unit.

After use, dispose of the IFM SI5100 in an environmentally friendly way in accordance with the applicable national regulations.