PU1743 - Sensor IFM - Free user manual and instructions

Product Type	Electronic Pressure Sensor for Mobile Applications
Model Number	PU1743
Pressure Type	Relative Pressure
Measuring Range (Nominal Pressure)	0…500 psi
Max. Permissible Pressure (Static)	1450 psi
Bursting Pressure	11600 psi
Analogue Output Signal	0.5…4.5 V
Output Signal at Zero Pressure	0.5 V
Output Signal at Nominal Pressure	4.5 V
Process Connection	9/16-18 UNF
Recommended Tightening Torque	25…35 Nm
Operating Voltage (DC)	8…32 V
Medium Temperature Range	-40…125 °C
Ambient Temperature Range	-40…100 °C
Storage Temperature Range	-40…100 °C
Shock Resistance	500 g (1 ms, DIN EN 60068-2-27)
Vibration Resistance	20 g (10…2000 Hz, DIN EN 60068-2-6)
Electrical Connector	Deutsch DT04 3P
Applications	Hydraulic systems in mobile machines
Overload Protection	Do not exceed max. permissible pressure; bursting pressure must not be exceeded
Special Feature	Integrated diaphragm attachment with 0.3 mm restrictor for damping pressure peaks

Frequently Asked Questions - PU1743 IFM

How do I install the PU1743 pressure sensor?

Before installation, ensure the system is depressurized. Insert the sensor into a 9/16-18 UNF process connection and tighten to a torque of 25-35 Nm. The recommended torque depends on lubrication, seal, and pressure rating.

What is the output signal of the PU1743?

The PU1743 provides an analogue voltage output of 0.5 to 4.5 V corresponding linearly to the measured pressure. At 0 psi the output is 0.5 V, and at 500 psi (nominal) it is 4.5 V.

What is the maximum pressure I can apply to the sensor?

The maximum permissible static pressure is 1450 psi. The bursting pressure is 11600 psi and must never be exceeded, even momentarily, to avoid destruction and risk of injury.

Can the PU1743 be used in mobile hydraulic systems?

Yes, it is specifically designed for mobile hydraulic applications. It includes a diaphragm attachment with a 0.3 mm restrictor to reduce pressure peaks and cavitation effects common in such systems.

What are the electrical connection requirements?

The sensor uses a Deutsch DT04 3P connector. Connect the power supply (8-32 V DC) and the analogue output as per the wiring diagram. The voltage supply must comply with SELV/PELV (EN 50178). Cable length over 30 m or outdoor use may require overvoltage protection.

What temperature ranges can the sensor withstand?

The medium temperature range is -40 to 125 °C. Ambient temperature range is -40 to 100 °C, and storage temperature is also -40 to 100 °C.

How do I clean or maintain the sensor?

There are no specific cleaning instructions in the manual. Generally, avoid contact with aggressive chemicals. For soiling, gently wipe the housing with a dry cloth. Replace the sensor if the diaphragm is damaged.

What is the tightening torque for installation?

The recommended tightening torque for the PU1743 (500 psi range) is 25 to 35 Nm. For higher range models (8000 psi) it is 30-50 Nm. Torque depends on lubrication, seal, and pressure rating.

Is the sensor resistant to shock and vibration?

Yes, it can withstand 500 g shock (1 ms) and 20 g vibration (10-2000 Hz) according to DIN EN 60068-2-27 and -2-6 standards, making it suitable for rough mobile environments.

What should I do if the sensor is not outputting the correct signal?

First, check the pressure source and ensure the system is within the measuring range. Verify the electrical connections and supply voltage (8-32 V). If the output is fixed at 0.5 V or 4.5 V, the sensor may be damaged or overloaded. Refer to the manual for troubleshooting or contact IFM support.

USER MANUAL PU1743 IFM

Operating instructions Electronic pressure sensor for mobile applications

PU17xx

UK

80261064 / 00 03 / 2020

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

Contents

1 Preliminary note....2
2 Safety instructions .... 2
3 Functions and features....3
3.1 Applications ....4
3.2 Use in hydraulic systems of mobile machines....5
4 Functions....5
5 Installation....6
6 Electrical connection....6
7 Technical data and scale drawing....7

1 Preliminary note

Symbols used

▶ Instructions
→ Cross-reference

Important note

Non-compliance can result in malfunction or interference.

Information

Supplementary note.

CAUTION

Warning of personal injury.

Slight reversible injuries may result.

2 Safety instructions

- The device described is a subcomponent for integration into a system.

• The manufacturer is responsible for the safety of the system.
• The system manufacturer undertakes to perform a risk assessment and to create a documentation in accordance with legal and normative requirements to be provided to the operator and user of the system. This documentation

must contain all necessary information and safety instructions for the operator, the user and, if applicable, for any service personnel authorised by the manufacturer of the system.

• Read this document 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 (→ Functions and features).
• Only use the product for permissible media (→ Technical data).
• 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, programming, configuration, operation and maintenance of the product must be carried out by personnel qualified and authorised for the respective activity.
• Protect units and cables against damage.

CAUTION

For high medium temperatures, parts of the unit may heat up.

Risk of burns
▶ Do not touch the unit
▶ Protect the housing against contact with flammable substances and unintentional contact.

3 Functions and features

The pressure sensor detects the system pressure and converts it into an analogue output signal.

3.1 Applications

• Type of pressure: relative pressure

Order number	Final value of the measuring range (nominal pressure)	Static pressure resistance (max. permissible pressure)	Bursting pressure
	psi psi psi
PU1760 0	..8000 20000 36250
PU1700 0	..5000 14500 24650
PU1701 0	..3600 9000 17400
PU1732 0	..3000 7250 14500
PU1702 0	..1000 2500 13050
PU1743 0	..500 1450 11600

Avoid overload pressure exceeding the specified maximum permissible pressure by taking appropriate measures.

The indicated bursting pressure must not be exceeded.

Even if the bursting pressure is exceeded only for a short time, the unit may be destroyed. ATTENTION: Risk of injury!

For units with a final value of the measuring range of 8000 psi the limits of the pressure cycles across the lifetime apply ( → 7).

If the cable length exceeds 30 m or if used outside buildings, there is a risk of overvoltage pulses from external sources. We recommend to use the unit in protected operating environments and to limit overvoltage pulses to max. 500 V.

Pressure Equipment Directive (PED):

- Units with a final value of the measuring range of 500...5000 psi comply with the Pressure Equipment Directive and are designed and manufactured for group 2 fluids in accordance with the sound engineering practice. Use of group 1 fluids on request!

Pressure Equipment Directive (PED):

The units with a final value of the measuring range of 8000 psi comply with the Pressure Equipment Directive. They are designed for group 2 fluids and manufactured and tested according to Module A.

Use of group 1 fluids on request!

The units are vacuum resistant.

3.2 Use in hydraulic systems of mobile machines

Restrictor in the process connection:

In hydraulic systems of mobile machines, highly dynamic effects such as pressure peaks, cavitation etc. may arise depending on the operating conditions. To reduce these effects on the measuring element of the sensor, a diaphragm attachment is integrated into the process connection.

The specific thread pitch of the diaphragm attachment has the effect of a hole of 0.3 mm.

Please note:

High viscosity may reduce the response time by some milliseconds. Heavy soiling may affect the functionality.

4 Functions

Voltage output 0.5 ... 4.5 V (PU17xx)

P = system pressure
MAW = initial value of the measuring range MEW = final value of the measuring range
In the measuring range, the output signal is between 0.5 and 4.5 V.

5 Installation

Before installing and removing the unit: Make sure that no pressure is applied to the system.

▶ Insert the unit in a 9/16-18 UNF process connection.
▶ Tighten firmly. Recommended tightening torque:

Final value of the measuring range in psi Tightening torque in Nm
500...5000 25...35
8000 30...50
Depends on lubrication, seal and pressure rating!

6 Electrical connection

The unit must be connected by a qualified electrician. Voltage supply to EN 50178, SELV, PELV.

▶ Disconnect power.
▶ Connect the unit as follows:

PU17xx (0.5...4.5 V analogue)

Deutsch DT04 3P
	OUT: Analogue output 0.5...4.5 V

7 Technical data and scale drawing

Pressure Equipment Directive (PED) stipulates that the following technical data must be provided for units with a final value of the measuring range of 600 bar.

PU1760
Operating voltage [V]	8..32 DC
Analogue output	0.5..4.5 V
Medium temperature [°C]	-40..125
Ambient temperature [°C]	-40..100
Storage temperature [°C]	-40..100
Pressure cycles (min.) across lifetime	60 million for 1.2 x nominal pressure
Shock resistance [g]	500 (DIN EN 60068-2-27, 1 ms)
Vibration resistance [g]	20 (DIN EN 60068-2-6, 10..2000 Hz)

Further technical data and scale drawing at www.ifm.com.