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What are the key safety instructions for the IFM SI0553 flow monitor?
The IFM SI0553 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 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.
• 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.
What do the symbols used in the documentation for the IFM SI0553 mean?
The symbols used in the documentation are defined as follows:
►: Requirement
▷: Instructions
→: Reaction, result
[…]: Designation of keys, buttons or indications
→: Cross-reference
Important note: Non-compliance may result in malfunction or interference.
Information: Supplementary note
What is the intended use of the IFM SI0553?
The IFM SI0553 device monitors the flow in liquid and gaseous media.
How does the IFM SI0553 flow monitor function?
The IFM SI0553 detects flow based on the calorimetric measuring principle and switches the output. At the factory setting, the switch point is at LED 7, and the device is set to normally open. The switch point LED indicates the switching status: orange for a closed output and red for an open output.
With normal flow (flow ≥ switch point), the output has the following status:
• 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 of the device is 1 to 10 seconds and can be 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.
What are the installation requirements for the IFM SI0553?
When installing the IFM SI0553, follow these guidelines:
CAUTION: 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.
• Recommended immersion depth is a minimum of 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 is possible.
• For horizontal pipes, if the pipe is completely filled with medium: mounting from the top is possible.
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.
How should I account for pipe interference when installing the IFM SI0553?
Structures in the pipe, such as bends, valves, and reducing pieces, can affect the function of the IFM SI0553. To minimize interference, adhere to the following distances between the sensor and the interference source:
• Maintain a distance of 5 to 10 times the pipe’s outside diameter (D) upstream of the sensor.
• Maintain a distance of 3 to 5 times the pipe’s outside diameter (D) downstream of the sensor.
How do I connect the IFM SI0553 to the process using an adapter?
To connect the IFM SI0553 using a process adapter, follow these steps:
▷ 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.
▷ Screw the suitable adapter into the process connection.
▷ Place the flow monitor onto the adapter and tighten the nut. The tightening torque is 25 Nm. Ensure that the unit is correctly oriented.
How do I wire the IFM SI0553 flow monitor?
The IFM SI0553 must be connected by a qualified electrician, observing national and international regulations for electrical equipment installation. Use a voltage supply according to SELV, PELV.
▷ Disconnect power before connecting.
▷ Connect the unit as follows:
| Pin | Assignment |
|---|---|
| 1 (BN – brown) | Ub+ (L+) |
| 3 (BU – blue) | Ub- (L-) |
| 2 (WH – white) | Input for external teach signal (remote adjustment) (IN) |
| 4 (BK – black) | Switching signal flow (OUT) |
Important:
• Only use 4-wire sockets without a bridge between pin 2 and pin 4.
• 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.
What are the functions of the operating and display elements on the IFM SI0553?
The IFM SI0553 has two main elements for operation and display:
1. Operation indication (LED bar graph):
• The LEDs numbered 0 to 9 represent the range between flow standstill and maximum flow.
• The green LEDs indicate the current flow.
• An illuminated LED shows the position of the switch point: Orange for a closed output, and Red for an open output.
2. Setting buttons ([<] and [>]):
• These buttons are used for adjustment and configuration of the device’s settings.
How do I perform the initial set-up of the IFM SI0553?
Follow these steps for the initial set-up:
▷ Switch on the supply voltage. All LEDs will light up and then go out step by step. During this time, the output status will be briefly inverted.
▷ The device is now in operating mode.
▷ Let the normal flow circulate in the installation.
▷ Check the display and determine the next actions based on the table below (example for factory setting: normally open, switch point at LED 7):
| Display | Explanation |
|---|---|
| Green LEDs are on, and the orange switch point LED is at 7 or higher. | The factory setting is suitable for the application. No further settings are required. |
| Green LEDs are below the orange switch point LED at 7. | Your normal flow is below the representation range of the display. You have two options: • Change the switch point. • Perform a high-flow adjustment. |
| All green LEDs up to 9 are on, and LED 9 flashes. | Your normal flow exceeds the representation range of the display. You need to perform a high-flow adjustment. |
For media other than water, an additional low-flow adjustment should be carried out.
How do I change the switch point on the IFM SI0553?
Changing the switch point from the factory setting (LED 7) is useful if the normal flow is outside the display range, the flow fluctuates, or a faster response time is needed.
▷ Briefly press the [<] or [>] button. The switch point LED will flash.
▷ Press [<] or [>] as often as required to move the switch point. Each press shifts the LED by one position.
▷ When the required switch point is reached, do not press the button for more than 2 seconds.
▷ The device will go into operating mode with the newly set value.
How do I perform a high-flow adjustment on the IFM SI0553?
A high-flow adjustment sets the current flow value as the new maximum for the display range.
▷ Let the normal (maximum) flow circulate in the installation.
▷ Press the [>] button and keep it pressed.
▷ LED 9 will turn on. After approximately 5 seconds, it will start flashing.
▷ Release the [>] button.
▷ The device adapts to the new flow condition and goes into operating mode. The display should now show an LED indication suitable for the application. This adjustment also increases the switch point proportionally (up to a maximum of LED 7).
How do I perform a low-flow adjustment on the IFM SI0553?
If the device is used in media other than water, it should be adapted to the minimum flow. Note that a high-flow adjustment must be performed before a low-flow adjustment.
▷ Let the minimum flow circulate in the installation, or ensure flow standstill.
▷ Press the [<] button and keep it pressed.
▷ LED 0 will turn on. After approximately 5 seconds, it will start flashing.
▷ Release the [<] button.
▷ The device adopts the new value and returns to the operating mode.
How do I change the switch point logic on the IFM SI0553 from normally open to normally closed?
Upon delivery, the IFM SI0553 is set to normally open. To change it to normally closed, follow these steps:
▷ Press the [<] button for at least 15 seconds.
▷ LED 0 will turn on, and after approx. 5 seconds, it will flash.
▷ After 10 seconds, the current setting is displayed: LEDs 5-9 light up orange, indicating the output is normally open.
▷ After approx. 15 seconds, LEDs 0-4 will flash orange.
▷ Release the [<] button.
▷ The output is now changed to normally closed function. To change it back, repeat the operation.
How do I reset the IFM SI0553 to its factory settings?
To reset all settings to their factory defaults:
▷ Press the [>] button for at least 15 seconds.
▷ LED 9 will turn on, and after approx. 5 seconds, it will flash.
▷ After approx. 15 seconds, LEDs 0-9 will flash orange.
▷ Release the [>] button.
▷ All settings are reset to the factory setting:
• Operating range: 5 to 100 cm/s for water
• Switch point: LED 7
How can I lock or unlock the IFM SI0553?
The IFM SI0553 can be electronically locked to prevent unauthorized changes to its settings. The factory setting is “not locked”.
To lock the unit:
▷ Press both setting keys ([<] and [>]) for 10 seconds.
▷ The display will go off, indicating the unit is locked.
To unlock the unit:
▷ Repeat the process by pressing both setting keys for 10 seconds.
How do I perform a remote calibration on the IFM SI0553?
The IFM SI0553 can be adapted to new flow conditions using the remote setting function via pin 2. The relative switch point is not shifted during this process.
High-flow adjustment:
▷ Let the normal flow circulate in the installation.
▷ Apply Ub+ to pin 2 for a duration of more than 5 but less than 10 seconds. LED 9 will turn on and flash after approx. 5 seconds.
▷ Disconnect the voltage from pin 2. The device adapts to the flow conditions and enters operating mode.
Low-flow adjustment:
▷ Let the normal flow circulate in the installation.
▷ Apply Ub+ to pin 2 for a duration of more than 10 but less than 15 seconds. LED 0 will turn on and flash after approx. 5 seconds.
▷ Disconnect the voltage from pin 2. The device adapts to the flow conditions and enters operating mode.
Restore factory settings:
▷ Apply Ub+ to pin 2 for more than 15 seconds. LED 9 will turn on and flash after approx. 5 seconds. After approx. 15 seconds, LEDs 0-9 will flash orange.
▷ Disconnect the voltage from pin 2. All settings are reset to factory defaults.
Important: Observe the time frame for the input signal on pin 2 exactly to avoid an unintentional reset to the factory setting.
What do the display indications mean during normal operation of the IFM SI0553?
During operation, the IFM SI0553 displays the current flow and switching status. In case of a power failure, all settings are retained. The following table explains the display for a normally open function with the switch point set at LED 4.
| Display | Explanation |
|---|---|
| LED 0 flashes | Current flow is below the display range. |
| Green LEDs are on, below the switch point LED (e.g., up to LED 2). Switch point LED is red. | Current flow is below the switch point. |
| Green LEDs are on up to the switch point LED (e.g., up to LED 4). Switch point LED is orange. | Current flow corresponds to the switch point. |
| Green LEDs are on, above the switch point LED (e.g., up to LED 6). Switch point LED is orange. | Current flow is above the switch point. |
| All green LEDs are on, and LED 9 flashes. | Current flow is above the display range. |
What should I do if my IFM SI0553 is unresponsive?
| Display / Symptom | Description | Corrective measures |
|---|---|---|
| LEDs go off briefly when a button is pressed. After approx. 0.6 seconds, the last operating status is indicated. | The device is permanently locked. | ▷ Unlock the device. |
| LEDs are permanently off. | Operating voltage is too low (< 19 V) or has failed. | ▷ Ensure correct voltage supply. |
| Operating indicator and red LEDs light alternately. | Short circuit at the switching output. | ▷ Remove the short circuit. The device will immediately return to normal operating status. |
| LEDs flash red after a flow adjustment. The device then returns to operating mode with unchanged values. | High-flow adjustment or low-flow adjustment was not successful. | ▷ Check whether all installation requirements have been met. ▷ Increase the distance between maximum flow and minimum flow and carry out the adjustment again. ▷ Carry out the two adjustment operations again in the right sequence. |
How should I maintain the IFM SI0553 flow monitor?
Only the manufacturer is allowed to repair the unit. To maintain the IFM SI0553, ensure the sensor tip is 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.
After use, dispose of the device in an environmentally friendly way in accordance with the applicable national regulations.
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