ST0512 - Flow controller IFM - Free user manual and instructions

Product type	Flow controller
Brand	IFM
Model	ST0512
Measurement principle	Thermal
Compatible fluids	Liquid fluids
Power supply	Up to 60 V, SELV/PELV per EN50178
Electrical connection	M12x1 connector, 4 wires (BN, WH, BU, BK)
Output	Switching signal (on/off)
Display	LED bar: red (not set), yellow (output switched), green (set)
Adjustment	Sensitivity potentiometer
Process connection	T-connection per DIN 2353
Dimensions (L x W x H)	101 x 52 x 72 mm (approximate)
Probe diameter	8.2 mm
Thread	M12x1
Minimum upstream distance	5 x pipe diameter
Minimum downstream distance	3 x pipe diameter
Protection against interference	IEC 1000-4-2/3/4/6 (levels specified in the manual)
Probe material	Stainless steel
Maintenance	Periodic cleaning of the probe tip with a soft cloth
Safety	Connection by an electrician; compliance with national and international standards
Supplied accessories	Potentiometer protection sticker
Repairability	Simple user maintenance; no specific spare parts

Frequently Asked Questions - ST0512 IFM

How to install the ST0512 flow controller?

Insert the probe into the T-connection per DIN 2353, then tighten the nut while maintaining the orientation. Respect a minimum distance of 5 times the pipe diameter upstream and 3 times downstream.

How to adjust the sensitivity of the ST0512?

Power on the device with constant flow. The yellow LED lights up. Turn the potentiometer until a green LED lights up. The farther the green LED is from the yellow, the safer the setting.

What to do if the red LED remains on after adjustment?

The red LED indicates the device is not set. Check that the flow is constant and repeat the potentiometer adjustment until a green LED is obtained.

How to clean the ST0512 probe?

Periodically clean the probe tip with a soft cloth. For stubborn deposits (limescale), use a common acetic cleaning product.

What type of fluid can be monitored with the ST0512?

The flow controller monitors liquid fluids. It detects whether a preset flow rate is reached or not.

What is the supply voltage of the ST0512?

The power supply can be up to 60 V, safety extra-low voltage (SELV/PELV) per EN50178.

How to electrically connect the ST0512?

Connection must be made by an electrician. Use a cable with M12x1 connector. Wire colors: BN (brown): +, WH (white): output, BU (blue): -, BK (black): output.

What minimum distance should be respected around the probe?

Upstream, at least 5 times the pipe diameter. Downstream, at least 3 times the diameter. Avoid bends or valves too close.

What to do in case of stubborn deposits on the probe?

Use a common acetic cleaning product to remove adherent deposits like limescale, then rinse with clean water.

Is the ST0512 resistant to electromagnetic interference?

Yes, it is designed for moderate electromagnetic fields according to IEC 1000-4-2/3/4/6 standards. Avoid high-power walkie-talkies nearby.

USER MANUAL ST0512 IFM

Technical line drawing of a mechanical component with threaded end and shaft (no text or symbols)

Technical diagram of a mechanical assembly with labeled parts ① and ②

BN L+ BK BU L-

BU L+ BK BN L-

1 BN 2/4 BK 3 BU L+ L-

3 BU 2/4 BK 1 BN L+ L-

1 = BN (braun), 2 = WH (weiß), 3 = BU (blau), 4 = BK (schwarz).

Einstellen

Diagram of a battery with internal circuit lines and terminal blocks (no text or symbols)

Function and features

The flow monitor monitors liquid media. It senses whether there is a preset flow (= medium flows) or not (= medium does not flow) and provides a switching signal.

- For use in T-pieces to DIN 2353.

Installation

Insert the unit into the T-piece (1) and orientate it. Fasten the nut (2); always keep the unit in its orientation.

Technical diagram of a mechanical assembly with labeled parts ① and ②

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:

BN L+ BK BU L-

BU L+ BK BN L-

1 BN 2/4 BK 3 BU L+ L-

3 BU 2/4 BK 1 BN L+ L-

Core colours of ifm sockets:

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

Adjustment

Diagram of a battery with an open lid and internal circuit lines (no text or symbols)

setting potentiometer sensitivity

chain of LED's

• red LED lights: the unit is not adjusted
• yellow LED lights: the output is switched

• green LED lights: the unit is adjusted

• Apply the operating voltage. Switch on the flow (preset value) and keep it constant.
  The yellow LED lights; the output is switched for about 20s (power-on delay time).

• Turn the pot until one green LED comes on. The farther the green LED is away from the yellow LED, the safer is the adjustment (excess gain for flow or temperature fluctuations).
• Conceal the pot after adjustment by the label provided to protect it against unauthorised tampering.

Operation

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

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

Technical diagram of a mechanical assembly with labeled parts ① and ②

BN L+ BK BU L-

BU L+ BK BN L-

1 BN L+ 2/4 BK 3 BU L-

3 BU 2/4 BK 1 BN L+ L-

Diagram of a battery with internal circuit lines and terminal blocks (no text or symbols)