PI7057 - Pressure sensor IFM - Free user manual and instructions

Product type	Electronic pressure sensor
Brand	IFM
Model	PI7057
Pressure type	Relative pressure
Measuring range	0 … 25 bar
Admissible overpressure	100 bar
Burst pressure	350 bar
Supply voltage	18 … 30 V DC
Output current	250 mA, short-circuit protection
Outputs	2 configurable transistor outputs (Hno, Hnc, Fno, Fnc)
Display	Digital display, 2 red status LEDs
Materials in contact with fluid	INOX 316L, ceramic, FPM (Viton), PTFE
Housing material	INOX 316L, Pocan, PC (Macrolon), PA, EPDM/X, FPM
Protection rating	IP 67, class III
Ambient temperature	-25 … +80 °C
Fluid temperature	-25 … +125 °C (+145 °C max 1h)
Switching point accuracy	< ± 1.0 % of the measuring range
Repeatability	< ± 0.25 % of the measuring range
Electrical connection	Colors: BN (brown), WH (white), BU (blue), BK (black)
Dimensions	See diagram in the manual
Weight	Approximately 150 g (estimate)
Cleaning	Clean the filter cover carefully, do not compress the residues
Safety	Follow the installation instructions, avoid pressure peaks, SELV/PELV
Repairability	Not repairable by the user, contact IFM

Frequently Asked Questions - PI7057 IFM

What type of pressure does the PI7057 sensor measure?

The sensor measures relative pressure (relative to atmospheric pressure).

What is the measuring range of the PI7057?

The measuring range is 0 to 25 bar. The admissible overpressure is 100 bar and the burst pressure is 350 bar.

How to configure the sensor outputs?

The two outputs can be configured separately with the functions: normally open hysteresis (Hno), normally closed hysteresis (Hnc), normally open window (Fno) or normally closed window (Fnc).

What is the required supply voltage?

The supply must be 18 to 30 V DC according to EN50178 (SELV/PELV).

How to clean the sensor if residues clog the filter?

Unscrew the filter cover with plastic pliers, clean carefully without compressing the residues into the vent. Re-tighten the cover. The sensor is IP67.

What is the switching point accuracy?

The accuracy is < ± 1.0 % of the measuring range, with a repeatability of < ± 0.25 %.

Can the sensor be used with high-temperature fluids?

Yes, the fluid temperature can range from -25 to +125 °C (up to +145 °C for 1 hour max).

How to lock the sensor to prevent accidental reprogramming?

In Run mode, press both push buttons simultaneously for 10 seconds. The display turns off to confirm locking. To unlock, repeat the operation.

What to do if the screen displays 'SC1' or 'SC2'?

These messages indicate a short circuit on switching output 1 or 2. The corresponding output is then cut off. Check the wiring.

What are the materials in contact with the fluid?

The materials are: stainless steel 316L, ceramic, FPM (Viton) and PTFE. Check compatibility with the fluid before use.

USER MANUAL PI7057 IFM

MD=Mode/Enter
S = Set

Sicherheitshinweise

OUT1 = Hno, OUT2 = Hnc,

SP1 = SP2 / rP1 = rP2.

5 Einstellbare Parameter

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.

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)

The unit is EHEDG 3A certified

Applications

Type of pressure: relative pressure

	Measuring range	Order no.	Permissible overl. pressure	Bursting pressure
PI70x3 0 ...	25 bar 100 bar 350	bar
PI70x4 0 ...	10 bar 50 bar 150 bar
PI70x6 0 ...	2.5 bar 20 bar 50 bar
PI70x7 0 ...	1 bar 10 bar 30 bar
PI70x8 0 ...	250 mbar	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)!

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!

Hysteresis:

The hysteresis keeps the switching state of the output stable if the system pressure varies about the preset value. When the system pressure is rising, the output switches when the switch-on point has been reached (SPx); when the system pressure is falling again, the output switches back when the switch-off point (rPx) has been reached.

The hysteresis can be set: First the switch-on point is set, then the switch-off point with the requested difference.

Window function:

The window function enables the monitoring of a defined acceptable range. When the system pressure varies between the switch-on point (SPx) and the switch-off point (rPx), the output is switched (window function / NO) or not switched (window function / NC).

The width of the window can be set by means of the difference

between SPx and rPx. SPx = upper value, rPx = lower value.

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 for a short time, the corresponding parameter value is displayed for approx. 5s; then 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. Installation

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

The unit is adaptable for various process fittings. ifm adapters to be ordered separately as accessories.

Horizontal mounting recommended for high medium temperatures.

The housing (A) is freely rotatable.

Prozess adapter:

Mount adapter (C) to the sensor first, then sensor + adapter to the process connection by means of a nut, a clamping flange or similar (B).

If it is not possible to slide the fixing element (B) down over the top of the sensor: slide it up over the bottom of the sensor before the adapter is mounted.

Sensor and adapter are only to be mounted once.

If it is not possible to slide the fixing element (B) down over the top of the sensor: slide it up over the bottom of the sensor before the adapter is mounted.

Welding adapter:

Weld the adapter first. Then mount the sensor.

Mounting of the adapter Step 1

Grease thread and sealing chamfer of the sensor and of the adapter with the greasing paste supplied.

The greasing paste is food-grade (USDA-H1 84-201).

Make sure that the O-ring (D) is correctly positioned.

D

Step 2

Screw the sensor into the adapter. Avoid mechanical influence on the sealing chamfers.

Step 3

Clamp sensor and adapter into a clamping device (E). The sealing chamfers (F) must not be damaged. Tighten the sensor with a spanner until you can feel the end stop.

Note: If you continue to turn, this can have adverse effect on the sealing.

36

E

F

4. 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:

Core colours of ifm sockets:

1 = BN (brown), 2 = WH (white),

3 = BU (blue), 4 = BK (black).

Programming of complementary outputs:

output 1: = Hno, output 2: = Hnc,

SP1 = SP2 / rP1 = rP2.

5. Adjustable parameters

Menu structure: see fold out page

SP1 SP2	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
rP1 rP2	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 bar rPx 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).
d51 d52 dr1 dr2	Delay time for the switching output dSx = switch-on delay; drx = switch-off delay The 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
O01 O02	Switching functions of the switching output 4 settings can be selected: Hno = hysteresis / normally open Hnc = hysteresis / normally closed Fno = window function / normally open Fnc = window function / normally closed
dAP	Damping for the switching output Pressure 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

6. Programming

Take the following 3 steps for programming:

1	Mode/Enter Set	→SP1	Press the Mode/Enter button several times until the respective parameter is displayed.
2	Mode/Enter Set	→10	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).
		→15
3	Mode/Enter Set	→SP1	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 run mode.

Locking / Unlocking

The unit can be electronically locked to prevent unwanted adjustment of the set parameters: Press (in Run mode) both setting buttons 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)
SC 1	(FLASHING) = short-circuit in switching output 1/2;
SC 2	the respective output is switched off

Cleaning of the filter cover

If viscous and residues producing media clog the filter cover of the sensor (and thus reduce the measuring accuracy slightly), you can clean it.

Unscrew the filter cover (B) (use a pair of pliers with plastic-covered jaws for this). Clean the cover thoroughly.

The vent (A) should only be cleaned by skilled personnel and with utmost care.

Possible medium residues must not be compressed and pressed into the vent. This could clog the filter system and reduce the measuring accuracy of the sensor.

Screw the filter cover again tightly.

The sensor is sufficiently protected against harsh ambient conditions (protection IP 67). The protection rating can be increased by a special accessory (order no. E30043).

8. Technical data

Operating voltage [V]	18 ... 30 DC
Current rating [mA].	250 short-circuit protection, reverse polarity protection / overload protection, integrated Watchdog Voltage drop [V]. < 2 Current consumption [mA] < 60
Repeatability [% of value of measuring range]	< ± 0.25 Accuracy of switch point [% of value of measuring range] < ± 1.0 Temperature drift [% of value of measuring range / 10 K] < ± 0.3* in the temperature range [°C] -25 ... +145 Power-on delay time [s] 0.2
Materials (wetted parts)	stainless steel (316S12); ceramics; FPM (Viton); PTFE
Housing material	stainless steel (316S12); Pocan; PC (Macrolon); PA; EPDM/X (Santoprene); FPM
Protection	IP 67 Protection class. III
Insulation 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 million
Ambient temperature [°C]	-25 ... +80
Medium temperature [°C]	-25 ... +125 (+145 max. 1h)
Storage temperature [°C]	-40 ... +100
EMC
IEC 1000/4/2 ESD:	4 / 8 KV
IEC 1000/4/3 HF radiated:	10 V/m
IEC 1000/4/4 Burst:	2 KV
IEC 1000/4/6 HF conducted:	10 V

*0.4% for PI70x8

9. Scale drawing

(1) 7-segment display
(2) programming button
(3) filter cover

④ sealing edge
(5) ifm thread for connection to ifm process adapter