ST0566 - Flow detector IFM - Free user manual and instructions

Product type	Flow controller (flow detector)
Brand	IFM
Model	ST0566
Range	efector300
Dimensions (approx.)	Length 83 mm (depending on thread version)
Available threads	M12x1, G1/4", G1/2", 1/2" NPT
Power supply	Up to 60 V DC (SELV/PELV according to EN50178)
Main function	Flow monitoring of fluids (liquids)
Response time	Short (approx. 1 to 2 seconds)
Switching indication	Yellow LED (output) and green/red LED bar
Output type	Normally open or normally closed (depending on setting)
Fluid velocity range	Greater than 100 cm/s
Sensitivity adjustment	Potentiometer with LED bar
Maintenance and cleaning	Periodically clean the probe tip with a soft cloth; for stubborn deposits, use an acetic acid cleaner
Safety instructions	Installation by an electrician; comply with national standards; disconnect power before connection
Immunity to interference	Compliant with IEC/EN 61000-4-2/3/4/6 (severity levels indicated in the manual)
Fluid temperature	Not specified in the excerpt, but typical for industrial use
Probe material	Stainless steel (likely)
Maximum pressure	Not specified, but suitable for standard applications

Frequently Asked Questions - ST0566 IFM

How to adjust the ST0566 flow detector?

Install the device in constant circulation, turn the potentiometer clockwise until the 6th green LED, then wait 20 seconds and turn counterclockwise until the 1st/2nd green LED. Stop the flow to check switching.

What is the minimum distance to maintain around the probe?

Upstream: at least 5 times the pipe diameter; downstream: at least 3 times the diameter.

How to mount the device on a horizontal pipe?

Mount it laterally, never directly on the top or bottom. On a vertical pipe, prefer an area where the fluid is rising.

What to do if the LED oscillates between green and red?

This indicates a fault: either the maximum speed is not reached after circulation starts, or the flow does not stop completely. Check the adjustment and flow conditions.

What is the required electrical supply?

The device operates on safety extra-low voltage (SELV/PELV) up to 60 V DC, in accordance with EN50178.

How to clean the probe?

Periodically check for deposits on the probe tip. Remove them with a soft cloth. For limescale, use a standard acetic cleaning product.

What are the electrical connections?

Diagram: 1 BN (brown) = L+, 3 BU (blue) = L-, 2/4 BK (black) = output. Colors correspond to ifm female connectors.

Can I use the device with powerful walkie-talkies?

Additional measures may be necessary as the device is designed for moderate electromagnetic fields. Avoid nearby HF sources.

What is the detectable fluid velocity range?

The detector is suitable for flow velocities greater than 100 cm/s. It allows fast detection of stop or circulation.

How to verify proper operation after installation?

After mounting, wiring, and adjustment, put the installation into service and check that the yellow LED turns on/off correctly with flow changes. A fault is indicated by the LED oscillating between green and red.

USER MANUAL ST0566 IFM

Flow monitor ST (short response time)

Technical line drawing of a mechanical component with no visible text or symbols

Function and features

The flow monitor monitors liquid media. It makes quick detection of flow or no flow at high flow rates possible (> 100 cm/s).

The flow signal is always near the switch point (2nd red to 2nd green LED). As a consequence the unit cannot be set with a higher excess gain in order to compensate for flow or temperature fluctuations.

The flow is to be switched on and off as quickly as possible, i.e. when the flow is switched on the maximum flow rate, when the flow is switched off the state “no flow” is to be reached as quickly as possible.

Installation

The sensor tip must be completely immersed in the medium.

In the case of horizontal pipes mount the unit from the side, if possible (fig. 1). Do not mount it directly from the top or bottom.

In the case of vertical pipes mount in a place where the medium flows upwards (fig. 2).

D = 15mm for units with M12 x 1 and 1/4" thread

D = 23mm for units with 1/2" thread.

To avoid malfunction a minimum distance between the flow monitor and bends, valves or such like must be observed (fig. 3).

• Min. 5 x pipe diameter upstream,
• Min. 3 x pipe diameter downstream.

Electrical connection

The unit must only be mounted by an electrician.

The national and international regulations for the installation of electrical equipment must be observed.

Voltage supply for units up to 60 V to EN50178, SELV, PELV.

Disconnect power before connecting the unit.

Wiring diagramm:

Core colours of ifm sockets:

1 = BN (brown), 2 = WH (white), 3 = BU (blue), 4 = BK (black).

Adjustment

1. Insert the unit into the flow and apply operating voltage.
2. Set requested flow (valve "OPEN") and keep it constant.
3. Set unit to 6th green LED by turning the potentiometer clockwise.

1. When power-on delay time has elapsed (ca. 20s), set display to 1st/2nd green LED by turning the potentiometer anticlockwise.

1. Switch off flow (valve “CLOSED”). The flow monitor indicates “no flow” after approx. 1 to 2s: the yellow LED goes off (if unit is normally open) or comes on (if unit is normally closed).
2. Switch on flow again. The flow monitor indicates “flow o.k.” after 1 - 2 seconds (yellow LED comes on/goes off again).

Now the flow monitor is ready for use.

Operation

After mounting, wiring and setting check whether the unit operates correctly.

The flow monitor indicates errors by 2 signals:

a) outputs alternative: on, off, on, off,
b) the LED fluctuate from red to green and back.

The following errors are indicated in this way:

• When flow is switched on, the maximum flow rate is not reached.
• When flow is switched off, flow is not completely stopped (low flow rate remains).
• Faulty setting of the unit.

Recommended maintenance

Check the sensor tip for build-up from time to time. Clean it with a soft cloth. If necessary, build-up which adheres firmly (e.g. lime) can be removed with a common vinegar cleansing agent.

The units are suitable for use in moderate electromagnetic fields (see table). When operating ISM equipment or powerful walkie-talkies in the vicinity of the units additional measures to avoid malfunction can be required.

Noise immunity Standard Severity level
ESD	IEC 1000-4-2 / EN 61000-4-2	4 kV CD / 8 kV AD
HF radiated	IEC 1000-4-3 / EN 61000-4-3	3 V/m; 80 ... 1000 MHz
Burst	IEC 1000-4-4 / EN 61000-4-4	2 kV coupling pliers
HF conducted	IEC 1000-4-6 / EN 61000-4-6	3 V; 0.15 ... 80 MHz