PN7021 - Pressure sensor IFM - Free user manual and instructions

Product type	Electronic pressure sensor
Brand	IFM
Model	PN7021
Category	Pressure sensor
Measuring range	0...250 bar (relative pressure)
Admissible overpressure	400 bar
Burst pressure	850 bar
Supply voltage	18...30 V DC
Max. output current	250 mA (per output)
Protections	Short circuit, reverse polarity, overload
Number of outputs	2 PNP switching outputs
Output functions	Hysteresis N.O./N.C., Window N.O./N.C.
Display	Digital 4-digit, red status LEDs
Switching point accuracy	< ±1% of measuring range
Repeatability	< ±0.5% of measuring range (estimated)
Temperature drift	< ±0.2% of measuring range / 10°C (estimated)
Ambient temperature	-25...+80 °C
Fluid temperature	-25...+80 °C
Materials in contact with fluid	Stainless steel 303, ceramic, FPM (Viton)
Protection rating	IP 67 (IP 65 for some versions)
Dimensions	Ø34 x 91.5 mm (without connector)
Process connection	M12 x 1
Error display	OL (overpressure), SC1/SC2 (short circuit)
Programmable functions	SPx, rPx, dSx, drx, OUx, dAP

Frequently Asked Questions - PN7021 IFM

How to set the upper switching point (SP1 or SP2)?

Press Mode/Enter repeatedly until SP1 or SP2 is displayed. Hold down Set to increment the value. Release and briefly press Mode/Enter to confirm.

What does the display 'OL' mean?

The OL display indicates overpressure (about 110% of rated pressure). Reduce pressure to avoid damaging the sensor.

How to choose between Hno, Hnc, Fno and Fnc modes?

The modes define the output behavior: Hno (hysteresis normally open), Hnc (hysteresis normally closed), Fno (window normally open), Fnc (window normally closed). Select via parameter OU1 or OU2.

What is the required supply voltage?

The sensor requires a supply voltage of 18 to 30 V DC. Comply with standard EN50178 (SELV/PELV).

Can gases be measured with this sensor?

Yes, but limited to 25 bar maximum for gaseous fluids under pressure. Also check material compatibility.

How to clean the sensor?

Use a soft dry cloth. Avoid aggressive solvents. For parts in contact with fluid, comply with indicated materials (stainless steel, ceramic, FPM).

What to do if the display flashes 'SC1' or 'SC2'?

This indicates a short circuit on the affected output. The output is deactivated. Check wiring and eliminate the short circuit.

How to lock or unlock programming?

In Run mode, press both buttons (Mode/Enter and Set) simultaneously for 10 seconds. The display briefly turns off to confirm.

What is the function of the delay dSx and drx?

dSx delays switch-on and drx delays switch-off of the output. Adjustable from 0 to 50 seconds to avoid unwanted switching.

How to interpret the display '0' when the circuit is under pressure?

The display starts indicating pressure from 1% of the measuring range. Below this threshold, '0' does not indicate absence of pressure.

USER MANUAL PN7021 IFM

Line drawing of a digital pressure meter with dual dials and a base (no text or symbols)

InhaltSicherheitshinweise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. Bestimmungsgemäße Verwendung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2. Betriebsarten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3. Einstellbare Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4. Montage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5. Elektrischer Anschluß . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6. Programmieren . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7. Inbetriebnahme / Betrieb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8. Maßzeichnung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9. Technische Daten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DEUTSCH

ContentsSafety instructions ...... page 14Controls and visual indication ...... page 141. Function and features ...... page 152. Operating modes ...... page 173. Adjustable parameters ...... page 184. Installation ...... page 195. Electrical connection ...... page 196. Programming ...... page 207. Installation and set-up / operation ...... page 218. Scale drawing ...... page 219. Technical data ...... page 22

ENGLISH

M = Mode/Enter
S = Set

Programmieren / Programming / Programmation

1	1 x 2 x...	Parameter aufrufenSelect parametersSélectionner les paramètres
2	> 5s	Werte einstellen*Set Values*Régler la valeurs*
3	1 x	Werte bestätigenAcknowledgement of valuesConfirmer la valeur

*Wert verringern: Lassen Sie die Anzeige bis zum maximalen Einstellwert laufen. Danach beginnt der Durchlauf wieder beim minimalen Einstellwert.
*Decrease the value: Let the display of the parameter value move to the maximum setting value. Then the cycle starts again at the minimum setting value.
*Réduire la valeur du paramètre: Laisser l'affichage de la valeur du paramètre aller jusqu'à la valeur de réglage maximum. Ensuite le cycle recommence à la valeur de réglage minimum.

Sicherheitshinweise

$$ O U T 1 = H n o, O U T 2 = H n c, $$

$$ \mathrm{SP1} = \mathrm{SP2} / \mathrm{rP1} = \mathrm{rP2}. $$

6. Programmieren

Please read the product description prior to installing the unit. Please check that the product is suitable for your application without any restrictions.

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

Please check in all applications that the product materials (see Technical data) are compatible with the media to be measured.

For gaseous media the application is limited to max. 25 bar.

Controls and visual indication

1	7-segment display	display of the system pressure, display of parameters and parameter values
2	2 x LED red	switching status; lights if output I / II has switched
3	Mode / Enter button	selection of the parameters and acknowledgement of the parameter values
4	Set button	setting of the parameter values (scrolling by holding pressed; incremental by pressing briefly)

1. Function and features

• The pressure sensor detects the system pressure,
  • shows the current system pressure on its display (indication as from 1% to 105% of the value of the measuring range)
• and generates 2 output signals according to the set output configuration.

	output 1 output 2
Switching function (can be selected for each output separately)	hysteresis function / N.O. (Hno)
	hysteresis function / N.C. (Hnc)
	window function / N.O. (Fno)
	window function / N.C. (Fnc)

Applications

Type of pressure: relative pressure

Order no.	Measuring range	Permissible overl. pressure	Bursting pressure
PN7xx0/PE7xx0	0 ... 400 bar 600 bar	1000 bar
PN7xx1/PE7xx1	0 ... 250 bar 400 bar	850 bar
PN7xx2/PE7xx2	0 ... 100 bar 300 bar	650 bar
PN7xx3/PE7xx3	0 ... 25 bar 100 bar	350 bar
PN7xx4/PE7xx4	0 ... 10 bar 50 bar 1	50 bar
PN7xx6/PE7xx6	0 ... 2,5 bar 20 bar	50 bar
PN7xx7/PE7xx7	0 ... 1 bar	10 bar	30 bar

Avoid static and dynamic overpressure exceeding the given overload pressure.

Even if the bursting pressure is exceeded only for a short time the unit can be destroyed (danger of injuries)!

For gaseous media the application is limited to max. 25 bar.

Indication of the current system pressure as from 1% of the value of the measuring range. Display "0" does not mean that the system is free of pressure!

©

2. Operating modes

Run mode:

(Normal operating mode)

When the supply voltage has been applied, the unit is in the Run mode. It monitors and switches the transistor outputs according to the set parameters.

The display shows the current system pressure, the red LEDs indicate the switching state of the outputs.

Display mode:

(Indication of parameters and the set parameter values)

When the "Mode/Enter" button is pressed for a short time, the unit passes to the Display mode. Internally it remains in the operating mode. Irrespective of this the set parameter values can be read:

• The parameter names are scrolled with each pressing of the "Mode/Enter" button.
• When the "Set" button is pressed briefly, the corresponding parameter value is displayed for 5s. After another 5s the unit returns to the Run mode.

Programming mode:

(Setting of the parameter values)

The unit passes to the programming mode when after the selection of a parameter value (Display mode) the "Set" button is pressed until the display of the parameter value is changed. Internally the unit remains in the operating mode. It continues its monitoring function with the existing parameters until the change has been terminated.

You can change the parameter value by pressing the "Set" button and confirm it by pressing the "Mode/Enter" button. The unit returns to the Run mode when no button has been pressed for 5s.

3. Adjustable parameters

(Menu structure: see page 3)

	Switch-on point: Upper limit value at which the output changes its switching status.● setting range 1 ... 100% of the value of the measuring range● in steps of 0.5% of the value of the measuring range● indicated in bar
	Switch-off point: Lower limit value at which the output changes its switching status.● setting range 0.5 ... 99.5% of the value of the measuring range● in steps of 0.5% of the value of the measuring range● indicated in barrPx is always lower than SPx. The unit only accepts values which are 0.5% lower than SPx.Changing the switch-on point also changes the switch-off point (the distance between SPx and rPx remains constant).If the distance is higher than the new switch point, it is automatically reduced (rPx is set to the minimum setting value).
	Delay time for the switching outputsdSx = switch-on delay; drx = switch-off delayThe output does not immediately change its switching status when the switching condition is met but when the delay time has elapsed. If the switching condition is no longer met when the delay time has elapsed, the switching state of the output does not change.● setting range: 0 - 0.2 - 0.4 ... 9.8 - 10 - 11 - ... - 49 - 50s● in steps of 0.2 or 1s● indicated in seconds
	Switching functions of the switching outputs4 settings can be selected:Hno = hysteresis / normally openHnc = hysteresis / normally closedFno = window function / normally openFnc = window function / normally closed
dAP	Damping for the switching outputsPressure peaks of short duration or high frequency can be filtered out.dAP-value = response time between pressure change and change of the switching status in ms.the value for dAP defines the switching frequency (f) of the output:
	dAP	3	6	10	17	30	60	125	250	500
	f [Hz]	170	80	50	30	16	8	4	2	1

4. Installation

Before mounting and removing the sensor, make sure that no pressure is applied to the system.

Mount the pressure sensor on a suitable process connection (see type label "Port Size").

5. Electrical connection

The unit must only be connected by an electrician.

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

Voltage supply to EN50178, SELV, PELV.

Disconnect power before connecting the unit.

Wiring:

graph TD
    A["4: OUT1\n2: OUT2"] --> B["1: BN"]
    A --> C["2: WH"]
    A --> D["4: BK"]
    A --> E["3: BU"]
    B --> F["L+"]
    C --> G["BK"]
    D --> H["BU"]
    E --> I["L-"]

Core colours of ifm sockets:

$$ 1 = \text { BN(brown) }, 2 = \text { WH(white) }, $$

$$ 3 = \text {BU} (\text {blue}), 4 = \text {BK} (\text {black}). $$

Programming of complementary outputs:

output 1: = Hno, output 2: = Hnc, SP1 = SP2 / rP1 = rP2.

6. Programming

Take the following 3 steps for programming:

1			Press the Mode/Enter button several times until the respective parameter is displayed.
2			Press the Set button and keep it pressed. The current parameter value is indicated for 5s, then the value is increased* (incremental by pressing briefly or scrolling by holding pressed).
3			Press the Mode/Enter button briefly (= acknowledgement). The parameter is displayed again, the set parameter value becomes effective.
Wait 5s (the unit passes to the operating mode and the current measured value is indicated again), or start again with step 1 to program other parameters.

*Decrease the value: Let the display of the parameter value move to the maximum setting value. Then the cycle starts again at the minimum setting value.

If no button is pressed for 20s during the setting procedure, the unit returns to the operating mode.

Locking / Unlocking

The unit can be electronically locked to prevent unwanted adjustment of the set parameters: Press (in Run mode) both pushbuttons for 10s. As soon as the indication goes out the unit is locked or unlocked. Units are delivered from the factory in the unlocked state.

With the unit in the locked state is indicated briefly when you try to change parameter values.

7. Installation and set-up / Operation

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

Faults displayed during operation:

OL	= overload pressure(as from approx. 110% of the max. nominal pressure)
SC1	(flashing) = short-circuit in switching output 1/2;
SC2	the respective output is switched off

8. Scale drawing

7-segment display

programming button

process connection

9. Technical data

Operating voltage [V]....18 ... 30 DCCurrent rating [mA].....250short-circuit protection,reverse polarity protection / overload protection,integrated WatchdogVoltage drop[V] < 2Current consumption [mA]....< 60

Repeatability [% of value of measuring range]....< ± 0.25Accuracy of switch point [% of value of measuring range]....< ± 1.0Temperature drift [% of value of measuring range / 10 K]....< ± 0.3in the temperature range [°C]....-25 ... +80Power-on delay time [s]....0.2

Materials (wetted parts)....stainless steel (303S22); ceramics; FPM (Viton)Housing material....EPDM/X (Santoprene); FPM (Viton); PA; Pocan;PC (Macrolon); stainless steel (304S15)Protection Px7xx0 ... Px7xx2....IP 67Protection Px7xx3 ... Px7xx7....IP 65*Protection class....IIIInsulation resistance [MΩ]....>100 (500 V DC)Shock resistance [g]....50 (DIN / IEC 68-2-27, 11ms)Vibration resistance [g]....20 (DIN / IEC 68-2-6, 10 - 2000 Hz)Switching cycles min....100 millionAmbient temperature [°C]....-25 ... +80Medium temperature [°C]....-25 ... +80Storage temperature [°C]....-40 ... +100EMCIEC 1000/4/2 ESD:....4 / 8 KVIEC 1000/4/3 HF radiated:....10 V/mIEC 1000/4/4 Burst:....2 KVIEC 1000/4/6 HF conducted:....10 V

*Increased protection (IP 67) with accessories (Order no. E30038).

1 = BN (brun), 2 = WH (blanc),

3 = BU (bleu), 4 = BK (noir).