Danfoss DST P92S User guide

Safety guide

Pressure transmitter SIL-2

DST P92S

ia.danfoss.com

Safety guide | DST P92S Pressure transmitter

Table of contents

Contents

1. Introduction ................................................................................................................................................. 2

2. General information.................................................................................................................................. 3

2.1 Contact........................................................................................................................................................... 3

2.2 Used symbols and format........................................................................................................................ 3

2.3 Reference....................................................................................................................................................... 3

2.4 Abbreviations............................................................................................................................................... 4

3. Qualication test........................................................................................................................................ 5

3.1 Compliance information......................................................................................................................... 5

3.2 Electromagnetic and electrical tests................................................................................................... 5

3.3 Environmental qualication................................................................................................................... 12

4. System information................................................................................................................................... 13

4.1 Functional safety classication............................................................................................................. 13

4.2 Technical data............................................................................................................................................. 14

4.3 Technical drawings..................................................................................................................................... 16

4.4 Pin congurations...................................................................................................................................... 17

4.5 Wiring diagram............................................................................................................................................ 17

4.6 Safety functions.......................................................................................................................................... 17

4.7 Diagnosis....................................................................................................................................................... 18

5. Safety requirements.................................................................................................................................. 18

5.1 Known issues............................................................................................................................................... 19

5.2 Instructions and constraints................................................................................................................... 19

5.3 Safe state....................................................................................................................................................... 19

5.4 System............................................................................................................................................................ 20

5.5 Pressure.......................................................................................................................................................... 21

5.6 Outputs.......................................................................................................................................................... 22

5.7 Decommissioning and disposal............................................................................................................ 24

5.8 Security.......................................................................................................................................................... 24

6. Transport and storage............................................................................................................................... 24

7. Maintenance................................................................................................................................................. 24

8. Mounting....................................................................................................................................................... 24

9. Dismounting................................................................................................................................................. 25

1. Introduction This document includes system information and
safety requirements for the pressure transmitter
DST P92S, which have to be considered and
fullled within the overall safety application.

It shall be used as input for the:

• development of the overall safety

application.

• overall installation and commissioning

planning.

• overall safety validation planning.

• overall operation, maintenance and repair

planning.

2 | © Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

2. General information

2.1 Contact

Danfoss A/S
Industrial Automation
DK-6430 Nordborg
Denmark
www.ia.danfoss.com
E-mail: technical [e-mail]

2.2 Used symbols and formats

REQIREMENT:
Requirement which shall be adhered
to maintain safe system operations.

RECOMMENDATION:
Recommendation on how to handle
certain aspects of requirements.

WARNING:
Warning of faults and errors during
the application development.

NOTE:
A note provides additional and
important information of the system
behavior.

2.3 Reference

No. Description

International standard IEC 61508:2010

/1/

Functional safety of electrical, electronic and programmable electronic safety-related systems

Safety standard EN ISO 13849-1:2015

/2/

Safety of machinery - Safety-related parts of control systems

/3/ Siemens standard SN 29500: Failure rates of components

EMC standard EN 61000-4-5:2005

/4/

Electromagnetic Compatibility; testing and measurement techniques - Surge immunity test

Safety standard ISO 25119:2010 / EN 16590:2014

/5/

Tractors and machinery for agriculture and forestry - Safety-related parts of constrol system

© Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782 | 3

Safety guide | DST P92S Pressure transmitter

2.4 Abbreviations

Abbreviation Description

AgPL Agricultural Performance Level: Safety classication according to ISO 25119 / EN 16590

CCF Common Cause Failure

CRC Cyclic Redundancy Check

DC Diagnostic Coverage

DFB Digital Feedback

DTI Diagnostic Test Interval

ECU Electronic Control Unit

EEPROM Electrically Erasable Programmable ROM

EMC Electromagnetic Compatibility

FRT Fault Reaction Time

FTT Fault Tolerance Time

FS Full Scale

GND Ground

HW Hardware

I/O Input / Output

MDT Mean Downtime

MTBF Mean Time Between Failure

MTTFd Mean Time To dangerous Failure

MTTR Mean Time To Restoration

PFH Probability of dangerous Failure per Hour

PL Performance Level: Safety classication according to EN ISO 13849

PST Process Safety Time

RAM Random Access Memory

ROM Read Only Memory

SFF Safe Failure Fraction

SIL Safety Integrity Level: Safety classication according to IEC 61508

SMM Shadow Memory Module (if existing)

SN Siemens Standard

SRL Software Requirement Level

SW Software

TBD To be determined / to be dened

VCC Positive voltage supply connection

VFB Voltage Feedback

VSRC Valid Safety Relevant Conguration

4 | © Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

3. Qualication tests

3.1 Compliance information

Standard Description Parameter

Conformity See EU Dclaration of conformity

Certication
Requirement in accordance
to the EC type-approval of

the Kraftfahrt-Bundesamt
KBA (Kraftfahrt­Bundesamt)

See also Functional Safety Classication on page 9

E

(KBA) - Fedral Motor tTransport

1

Authority:

All vehicle types with a 12 V

respectively 24 V - electrical

wiring and battery(-) at the

body

According UN ECE Regulation No. 10

3.2 Electromagnetic and electrical tests

Electrical Safety

Standard Test description Test parameter

Danfoss reference Supply voltage Current variant:

Operation with U
and U

= 9V DC for a duration of

min

= 32V DC

max

60 min. each.

Current
variant

x x

Ratiometric
voltage
variant

Ratiometric voltage variant:
Operation withg U
and U

= 4.5V DC for a duration

min

= 5.5 V DC

max

of 50 min. each

Danfoss reference Starting prole

switch-on
hysteresis

Overvoltage and hysteresis:
U

t = U

max

+3%

Tes

t = 5 min.

Undervoltage and hysteresis:
U

= U

Start

nom

ΔU = 0.1V
U

= U

min

switch-o

Danfoss reference Broken cable

supply lines

t at U

Interruption of supply lines:
Current variant:
U

max

U

min

switch-on

= 32V

= 9V

= 5 min.

Ratiometric voltage variant:
U

= 5.5V

max

U

= 4.5V

min

t = 60 sec.

Danfoss reference Short circuits Output signals to VCC or GND in

each case

t = 60 sec.

Danfoss reference
ISO 16750-2:
2012-11

Polarity
Protection

Change supply polarity:
t = 5 min.
Curent variant:
No current limitation of supply
necessary

x x

x x

x x

x x

© Danfoss | DCS (im) | 2020.01

Ratiometric voltage variant:
Current limiting of supply to 2A

IC.PS.P21.2A.02 | 520B7782 | 5

Safety guide | DST P92S Pressure transmitter

Standard Test description Test parameter

Danfoss reference Current

consumption

Supply current consumption
without load:
Current variant:
I

≤ 50 mA

max

Ratiometric voltage variant:
I

≤ 20 mA

max

Danfoss reference Load test 48 hours at minimum

temperature:
12 hours without operating, 36
hours with operating U

min

and l

min

48 hours at maximum

Danfoss reference
ISO 16750-2:
2012-11

Insulation
Resistance

temperature with operation U
and I

max

Unpowered; 500V DC; 60
sec.; 50% rh; 35 °C; between
Connector pins and electric

max

conductive housing without
galvanic contact.

Insulation resistance > 10 MΩ

CE Conformity (EMC)

Standard Test Description Test Parameter Current

variant

DIN EN 61000-6-3
DIN EN 61326
DIN 61326-2-3

DIN EN 610000-4-2:2009-12
DIN EN 61326-1

Emission

Electrostatic Discharge (ESD)

Conducted emission: 150 kHz to 30 MHz

Radiated emission: 30 MHz to 1 GHz

Direct discharge:
Contact discharge:
±2 kV, ±4 kV

Air discharge:
±2 kV, ±4 kV, ±8 k

Current
variant

x x

x x

x x

x x

x x

Ratiometric
voltage
variant

Ratiometric
voltage
variant

DIN EN 61000-4-2: 2009-12
DIN EN 61326-1 Electrostatic Discharge (ESD)

DIN EN 61000-4-2: 2009-12
DIN EN 61326-1 Electrostatic Discharge (ESD)

DIN EN 61000-4-3: 2011-04
DIN EN 61326-1
DIN EN 61326-2-3

DIN EN 61000-4-4: 2013-04
DIN EN 61326-1
DIN EN 61326-2-3

Immunity

Burst

6 | © Danfoss | DCS (im) | 2020.01

10 discarges per test point

Indirect discharge:
(horizontal coupling-plate)

Contact discharge: ±2 kV; ±4 kV

15 discharges per test point

Indirect discharge:
(vertical coupling-plate)

Contact discharge: ±2 kV; ±4 kV

15 discharges per test point

Immunity radio frequency:
80 MHz to 1 GHz (10 V/m)

1.4 GHz to 2.0 GHz (3 V/m)

2.0 GHz to 2.7 GHz (1 V/m)

3 m, horizontal and vertical

Test voltage:
Supply lines: ± 2 kV
Data lines: ±1 kV
Duration: 5 min.
Pulse form: 5/50 ns
Frequency: 5 kHz
Polarity: positive and negative

x x

x x

x x

x x

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

Standard Test Description Test Parameter Current

variant

Symmetrical coupling (L-N):
Supply lines: ±0.5 kV; ±1 kV
Coupling: 2 Ω / 18 µF

DIN EN 61000-4-5: 2007-06
DIN EN 61326-1
DIN 61326-2-3

DIN EN 610000-4-6: 2014
DIN EN 61326-1
DIN EN 61326-2-3

DIN EN 61000-4-8
DIN EN 61326-1
DIN EN 61326-2-3

DIN EN 61000-4-8
DIN EN 61326-3-1
DIN EN 61326-1
DIN EN 61326-2-3

Surge

Immunity

Power Frequency
Magnetic Fields

Power Frequency
Magnetic Fields

Unsymmetrical coupling (L-PE, N-PE, LN-PE):
Supply lines: ±0.5 kV; ±1 kV, ±2 kV
Signal lines: not required, cable length <30 m

Coupling: 12 Ω / 9 µF

Number of repeats: 5

Conducted disturbances

0.15 mHz – 80 MHz, 3 V, 80% AM sine wave 1 kHz

50 Hz / 60 Hz
30 A/m
60 sec. for each axis

50 Hz / 60 Hz
30 A/m
60 sec. for each axis

EMC (Automotive)

Standard Test Description Test Parameter Current

variant

Articial network (AN):
150 kHz to 108 MHz, 1 m, 120 kHz bandwidth class 3

Ratiometric
voltage
variant

x -

x x

x x

x x

Ratiometric
voltage
variant

x x

CISPR 25/ECE R10 Emission

ISO 11452-2: 2004-11 Immunity

ISO 11452-4: 2011-12 Immunity

ISO 7637-2: 2004-09 Emission

ISO 7637-2: 2004-09 Emission

Road vehicles, electrical
disturbance by conduction

ISO 7637-2: 2004-09

ISO 7637-2: 2004-09

ISO 7637-2: 2004-09

and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Road vehicles, electrical
disturbance by conduction
and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Road vehicles, electrical
disturbance by conduction
and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Antenna measurement (RE):
160 kHz to 30 MHz, 1 m, 9 kHz bandwidth class 4
30MHz to 1 GHz, 1 m, 120 kHz bandwidth class 3
1 GHz to 2.5 GHz, 1 m, 120 kHz bandwidth class 5

Absorber lined chamber:
200 MHz to 2 GHz, 200 V/m
CW, AM (1 kHz/80%), PM (577 us duration, 217 Hz
repetition rate)

BCI:
20 MHz to 400 MHz, 200 mA, AM, (1 kHz, 80%)

Transient emissions on supply cables (12 V system)
Severity level:III: +75 V, -100 V

Transient emissions on supply cables (24 V system)
Severity level III: +150 V, -450 V

Pulse 1 (12 V system): -150 V, 5000 pulses
Severity level: IV

Pulse 1 (24 V system): -600 V, 5000 pulses
Severity level: IV

Pulse 2a (12 V system): +50 V, 5000 pulses
Severity level: IV

x x

x x

x -

x -

x -

x -

x -

© Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782 | 7

Safety guide | DST P92S Pressure transmitter

Standard Test Description Test Parameter Current

variant

Road vehicles, electrical
disturbance by conduction

ISO 7637-2: 2004-09

ISO 7637-2: 2004-09

ISO 7637-2: 2004-09

ISO 7637-2: 2004-09

ISO 7637-2: 2004-09

ISO 7637-2: 2004-09

ISO 7637-2: 2004-09

ISO 7637-2: 2004-09

ISO 7637-2: 2004-09

ISO 7637-3: 2007-07 Immunity

and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Road vehicles, electrical
disturbance by conduction
and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Road vehicles, electrical
disturbance by conduction
and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Road vehicles, electrical
disturbance by conduction
and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Road vehicles, electrical
disturbance by conduction
and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Road vehicles, electrical
disturbance by conduction
and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Road vehicles, electrical
disturbance by conduction
and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Road vehicles, electrical
disturbance by conduction
and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Road vehicles, electrical
disturbance by conduction
and coupling (data, signal), test
level 4
Test level 4 for 12 V and 24V
systems

Pulse 2a (24 V system): +50 V, 5000 pulses
Severity level: IV

Pulse 2b (12 V system): +10 V, 10 pulses
Severity level: IV

Pulse 2b (24 V system): +20 V, 10 pulses
Severity level: IV

Pulse 3a (12 V system): -150 V, 1 hour
Severity level: IV

Pulse 3a (24 V system): -200 V, 1 hour
Severity level: IV

Pulse 3b (12V system):+100 V, 1 hour
Severity level: IV

Pulse 3b (24 V system):+200 V, 1 hour
Severity level: IV

Pulse 4 (12V system):-7 V, 1 pulse
Severity level: IV

Pulse 4 (24V system):-16 V, 1 pulse
Severity level: IV

Capacitive coupling (CCC)
12 V system
test level: IV (-110 V)
Test ime: 10 min.

24 V system
Test level: IV (-150 V)
test time: 10 min.

Ratiometric
voltage
variant

x -

x -

x -

x -

x -

x -

x -

x -

x -

x x

8 | © Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

Standard Test Description Test Parameter Current

variant

Capacitive coupling (CCC)
12 V system
test level: IV +75 V)

ISO 7637-3: 2007-07 Immunity

ISO 7637-3: 2007-07 Immunity

ISO 7637-3: 2007-07 Immunity

CISPR 25 Emission

ISO 10605: 2008-07 Electrostatic Discharge (ESD)

Test ime: 10 min.

24 V system
Test level: IV (+150 V)
test time: 10 min.

Capacitive coupling (ICC)
12 V system
test level: IV (-110 V)
Test ime: 10 min.

24 V system
Test level: IV (-150 V)
test time: 10 min.

Capacitive coupling (ICC)
12 V system
test level: IV (+75 V)
Test ime: 10 min.

24 V system
Test level: IV (+150 V)
test time: 10 min.

Conducted emission
150 kHz to 108 MHz

Powered-up test wit direct discharge:

- contact discharge:
±2 kV, ±4 kV, ±6 kV, ±8 kV

- air discharge
±4 kV, ±8 k±15 kV

Ratiometric
voltage
variant

x x

x x

x x

x x

x x

ISO 10605: 2008-07 Electrostatic Discharge (ESD)

ISO 10605: 2008-07 Electrostatic Discharge (ESD)

ISO 10605: 2008-07 Electrostatic Discharge (ESD)

3 discharges per test point

Powered-up test wit indirect discharge:

- contact discharge:
±2 kV, ±4 kV, ±6 kV, ±8 kV

50 discharges per test point

Unpowered-up test wit direct discharge:

- contact discharge to pins and connectors:
±2 kV, ±4 kV

3 discharges per test point

Unpowered-up test wit direct discharge:

- air discharge to surface:
±4 kV, ±8 k±15 kV

3 discharges per test point

x x

x x

x x

© Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782 | 9

Safety guide | DST P92S Pressure transmitter

EMC (Functional Safety with Normal Condition)

Standard Test Description Test Parameter Current

variant

Direct discharge:

Contact discharge:
DIN EN 61000-4-2: 2009-12
DIN EN 61326-3-1
DIN EN 61326-1
DIN EN 61326-2-3

Electrostatic Discharge (ESD

±6 kV

Air discharge:

±2 kV, ±4 kV, ±8 kV

10 discharges per test point

Indirect discharge (Horizontal coupling-plate):
DIN EN 61000-4-2: 2009-12
DIN EN 61326-3-1
DIN EN 61326-1

Electrostatic Discharge (ESD

Contact discharge:

±6 kV
DIN EN 61326-2-3

15 discharges per test jpoint.

Indirect discharge (Vertical coupling-plate):
DIN EN 61000-4-2: 2009-12
DIN EN 61326-3-1
DIN EN 61326-1

Electrostatic Discharge (ESD

Contact discharge:

±6 kV
DIN EN 61326-2-3

15 discharges per test jpoint.

DIN EN 61000-4-3: 2011-04
DIN EN 61326-3-1
DIN EN 61326-1

Immunity

80 MHz to 1.0 GHz (20 V/m)

1.4 GHz to 2.0 GHz (10 V/m)

2.0 GHz to 2.7 GHz (3 V/m)

DIN EN 61326-2-3

DIN EN 61000-4-3: 2013-04
DIN EN 61326-3-1
DIN EN 61326-1

Burst

Supply: ±3 kV (5/50 ns, 5 kHZ)

Signal: ±2 kV (5/50 ns, 5 kHz)

DIN EN 61326-2-3

Symmetrical coupling (L-N):

Supply lines: ±0.5 kV, ±1 Kv

Coupling: 2 Ω / 18 µF
DIN EN 61000-4-5: 2007-06
DIN EN 61326-3-1
DIN EN 61326-1
DIN EN 61326-2-3

Surge

Unsymmetrical coupling (L-PE, N-PE, L-N-PE):

Supply lines: ±0.5 kV, ±1 kV, ±2 kV

Signal lines: not required for cable length < 30 m

Coupling: 12 Ω / 9 µF

Ratiometric
voltage
variant

x x

x x

x x

x x

x x

x x

DIN EN 61000-4-6: 2014
DIN EN 61326-3-1
DIN EN 61326-1

Immunity

DIN EN 61326-2-3

DIN EN 61326-3-1
DIN EN 61326-1
DIN EN 61326-2-3

Voltage Dips

DIN EN 61000-4-29

DIN EN 61326-3-1
DIN EN 61326-1
DIN EN 61326-2-3

Short Interruptions

DIN EN 61000-4-29

10 | © Danfoss | DCS (im) | 2020.01

Number of repeats: 5

Conducted disturbance

0.15 MHz - 80 MHz

10 V

80% AM sine wave 1kHz

V

: 40%

dip

Td: 10 ms

Tr: 10 s

Number of repeats: 3

V

: 100%

dip

Td: 20 ms

Tr: 10 s

Number of repeats: 3

x x

x x

x x

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

EMC (Functional Safety with Fail-safe Condition)

Standard Test Description Test Parameter Current

variant

Direct discharge:

Contact discharge:
DIN EN 61000-4-2: 2009-12
DIN EN 61326-3-1
DIN EN 61326-1
DIN EN 61326-2-3

Electrostatic Discharge (ESD

±6 kV

Air discharge:

±2 kV, ±4 kV, ±8 kV

10 discharges per test point

Indirect discharge (Horizontal coupling-plate):
DIN EN 61000-4-2: 2009-12
DIN EN 61326-3-1
DIN EN 61326-1

Electrostatic Discharge (ESD

Contact discharge:

±6 kV
DIN EN 61326-2-3

15 discharges per test jpoint.

Indirect discharge (Vertical coupling-plate):
DIN EN 61000-4-2: 2009-12
DIN EN 61326-3-1
DIN EN 61326-1

Electrostatic Discharge (ESD

Contact discharge:

±6 kV
DIN EN 61326-2-3

15 discharges per test jpoint.

DIN EN 61000-4-3: 2011-04
DIN EN 61326-3-1
DIN EN 61326-1

Immunity

80 MHz to 1.0 GHz (20 V/m)

1.4 GHz to 2.0 GHz (10 V/m)

2.0 GHz to 2.7 GHz (3 V/m)

DIN EN 61326-2-3

DIN EN 61000-4-3: 2013-04
DIN EN 61326-3-1
DIN EN 61326-1

Burst

Supply: ±3 kV (5/50 ns, 5 kHZ)

Signal: ±2 kV (5/50 ns, 5 kHz)

DIN EN 61326-2-3

Symmetrical coupling (L-N):

Supply lines: ±0.5 kV, ±1 Kv

Coupling: 2 Ω / 18 µF
DIN EN 61000-4-5: 2007-06
DIN EN 61326-3-1
DIN EN 61326-1
DIN EN 61326-2-3

Surge

Unsymmetrical coupling (L-PE, N-PE, L-N-PE):

Supply lines: ±0.5 kV, ±1 kV, ±2 kV

Signal lines: not required for cable length < 30 m

Coupling: 12 Ω / 9 µF

Ratiometric
voltage
variant

x x

x x

x x

x x

x x

x x

DIN EN 61000-4-6: 2014
DIN EN 61326-3-1
DIN EN 61326-1
DIN EN 61326-2-3

DIN EN 61326-3-1
DIN EN 61326-1
DIN EN 61326-2-3
DIN EN 61000-4-29

DIN EN 61326-3-1
DIN EN 61326-1
DIN EN 61326-2-3
DIN EN 61000-4-29

© Danfoss | DCS (im) | 2020.01

Immunity

Voltage Dips

Short Interruptions

Number of repeats: 5

Conducted disturbance

0.15 MHz - 80 MHz

10 V

80% AM sine wave 1kHz

V

: 40%

dip

Td: 10 ms

Tr: 10 s

Number of repeats: 3

V

: 100%

dip

Td: 20 ms

Tr: 10 s

Number of repeats: 3

x x

x x

x x

IC.PS.P21.2A.02 | 520B7782 | 11

Safety guide | DST P92S Pressure transmitter

3.3 Environmental qualication

Standard Test Description Test Parameter Current

variant

5 Hz to 2000 Hz, 20 g

5 hours for each axis,

-40 °C to + 125 °C, 2 temperature cycles per axis,

directions: ±x, ±y, ±z

1 m free fall on concrete ground, 6 axes

10 Hz to 2000 Hz, broadband random, 32 hours for

each axis,

-40 °C to +85 °C, 4 tmperature cycles per axes

See ISO 16750-3:2012-12 clause 4.1.2.7

directions: ±x, ±y, ±z

DIN EN 60068-2-6: 2008-10
DIN EN 60068-2-14: 2010-04

DIN EN 60068-2-31: 2008
ISO 16750-3: 2012-12

DIN EN 60068-2-14: 2009
DIN EN 60068-2-64: 2008
ISO 16750-3: 2012-12

Environmental testing

- Vibration (sinusoidal) with
temperature prole

Environmental testing:
Free fall

Road vehicles ­Environmental conditions
and testing for electrical and
electronic equipment:
Mechanical loads ­Random vibration - Test VII

DIN EN 60068-2-27: 2009

DIN EN 60068-2-27: 2009

DIN EN 60068-2-2: 2008-05
ISO 16750-4: 2010-4

DIN EN 60068-2-2: 2008-05
ISO 16750-4: 2010-04

IEC 60068-2-14: 2009
DIN EN 60068-2-14: 2010-04

Environmental testing:
Shock

Environmental testing:
Bump

Environmental testing:
Cold storage

Environmental testing:
Dry heat (storage)

Environmental testing:
Change of temperature Na

50 g / 11 ms, half-sine wave, 3 shocks per direction

directions: ±x, ±y, ±z

Bumo, 30 g / 6 ms, half-sine wave, 3 shocks per

direction,

directions: ±x, ±y, ±y

24 hours with -40 °C

96 hours with 85 °C

-40 °C --> +85 °C, 100 cycles, duration time 1 hour,

temperature changes 10 seconds

Ratiometric
voltage
variant

x x

x x

x x

x x

x x

x x

x x

x x

IEC 60068-2-14: 2009
DIN EN 60068-2-14: 2010-04

IEC 60068-2-14: 2009
DIN EN 60068-2-14: 2010-04

ISO 16750-4: 2010-04

IEC 60068-2-30: 2005
DIN EN 60068-2-30: 2005

DIN EN 60068-2-78: 2014-02

IEC 60068-2-60: 1996-09
ISO 16750-4: 2010-04

DIN EN 60529: 2000-09
DIN 40050-9: 1993-05

Environmental testing:
Change of temperature Na

Environmental testing:
Life test, thermal shock

Environmental testing:
Ice water shock

Environmental testing:
Damp heat cyclic

Environmental testing:
Damp heat constant

Flowing mixed gas corrosin test

IP protection classes

ISO 16750-5: 2010-04 Chemical resistance

-40 °C --> +85 °C, 10 cycles

Weibull test according ISO 16750-1: 2003

: 60 Kelvin

ΔT

prac

Frequency of temperature dierences: twice a day

Number of days in the year: 365 days

Life time: 10 years

Cycles: 10

T

85 °C

max:

Duration time: 5 min.

+25 °C to 55 °C with 93% r.h. 6 cycles (each cycle 24

hours)

21 days with 40 °C and 93% r.h.

Sulfur dioxide SO2, hydrogen sulde H2S, nitrous

oxide NO2, Chlorine CI1

IP67/IP69K,

IP6KX Dust tight according to ISO 12103-1

Arizona test dust A2 ne

Gas / petrol, diesel, cleaner solvent, antifreeze, urea,

battery uid, brake uid, engine oil, hydraulic oil

x x

x x

x x

x x

x x

x x

x x

x x

12 | © Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

4. System information

The DST P92S is designed for the operation
in working machinery and further suitable
application areas and qualied especially for use
under harsh conditions.

The pressure transmitter is a passive intelligent
sensor. Its basically function is to convert the
physical quantity “pressure” to an electrical signal.

Available output types:
Curent variant:
Current output signal. This variant provides two
opposing current outputs 4 – 20 mA and
20 – 4 mA.

Ratiometric voltage variant:
Ratiometric voltage output signal. This variant
provides two opposing ratiometric voltage
outputs 10% * VCC – 90% * C and
90% * VCC – 10% ' VCC

4.1 Functional safety classication

The DST P92S has the following functional safety classication and parameters:

Standard Description Parameters of

current variant

Safety Integrity Level (SIL) 2

Architecture 1oo1 (single channel) 1oo1 (single channel)

IEC 61508/1/ (see “Reference” on
page 3)

EN ISO 13849-1 /2/ (see “Reference”
on page 3)

ISO 25119/EN 16590/5/(see
“Reference” on page 3)

Hardware Failure Tolerance (HFT) 0

Safety-related subsystem Type B

Safe Failure Fraction (SFF) 95.8% *

Average frequency of dangerous
failure per hour (PFH)

Performance Level (PL) d

Category (Cat.) 2

Avg. Diagnostic Coverage (DC

Common Cause Failures (CCF) 70 points

Mean Time To dangerous
Failure (MTTFD)

Agricultural Oerformance level
(AgPL)

Category (Cat)

Avg. Diagnostic Coverage (DC

Mean Time to Dangerous
Failure (MTTFdc)

Sofware Requirement Level (SRL)

6.1 x 10-9 1/h

) 94.7% *

avg

981 years 2090 years

d d

2 2

)

94.7%* 91.0%*

avg

981 years 2090 years

Not relevant Not relevant

Parameters of the
ratiometric voltage
variant

2

0

Type B

93.1%*

4.9 x 10-9 1/h

d

2

91.0%*

70 points

* with an external monitoring according to this safety guide

© Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782 | 13

Safety guide | DST P92S Pressure transmitter

4.2 Technical data

Pressure

Parameter Min. Max.

Nominel pressure range 0 - 10 bar 0 - 1200 bar

Overload (depending on pressure range) 50 bar 2400 bar

Installation torque of the pressure connection

Current output

Parameter Min. Max.

Current within nominal pressure range 4 mA 20 mA

Current at o-state 0 mA 2 mA

Current accuracy output SIG1 (depending on ambient temperature)

Tolerance for plausibility check current output SIG1 +
output SIG2

Current load (depending on power supply) 0 Ω 1325 Ω

Electrical protection

15 Nm

1% FS

35 Nm

2.5 % FS

Depending

on application

2.5 % FS

and ECU

tolerance: e.g.

3%FS

Short circuit protected (signal

on GND/VCC)

NOTE

• The accuracy is only guaranteed under
reference conditions (T

medium

= T

ambient

).

• The maximum current load depends on the
power supply and is calculated by R

MAX

=

(+UB - 5.5 V) / 0.02 A.

Operating area for current outputs of the current variant

14 | © Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

Output of ratiometric voltage variant

Parameter of the ratiometric voltage outputs

Parameter Min. Max.

Relative voltage withnin nominal pressure range

Relative voltage at o-state

Accuracy of output SIG1 (depending on ambient temperature)

Accuracy plausibility check output SIG1 + output SIG2
(depending on ambient temperature

Load Resistance

Load current

Capacitive load

Electrical protection

WARNING

If the application operates at
maximum load limit, pressures above
100% FS can not be displayed!

10%* VCC

0 V

1% FS

2.5% FS

90%* VCC

5%* VCC

2.5% FS

Depending on

application and

ECU tolerance:

e.g. 3% FS

≥ 10 kΩ

-

-

Short circuit protected

(signal on GND/VCC)

-

1.3 mA

10 nF

Power supply

Parameter Min. Max.

9 V DC 32 V DC

Current variant: Voltage supply (power supply pin VCC)

Ratiometric voltage variant: Voltage supply (power supply pin VCC)

Supply lines inverse-polarity

protected

4.5 V DC 5.5 V DC

Supply lines inverse-polarity oritec

ted with current limit of up to 2 A

General accuracy

Parameter Min. Max.

Linearity, pressure hysteresis and repeatability - 0.5% FS

Long-run stability - 0.2% FS

Timing

Parameter Min. Max.

Startup - 40 ms

Response time - 2 ms

© Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782 | 15

Safety guide | DST P92S Pressure transmitter

Mechanical data

Component Description

Housing Welded stainless steel

Degree of protection IP67, IP69K

Electrical connection M12

Pressure connection G¼, ¼ NPT, 7/16 - 20 UNF and 9/16 - 18 UNF

Installation torque Maximum 35 Nm

Material with medium contact EN/DIN 1.4548 / FK

Material housing EN/DIN 1.4301

Material diagphragm EN/DIN 1.4548

Material connector PBT-GF30

Dimensions (W x H x D) DST P92S G¼ with M12x1 PBT: 54 x 22 x 26 mm (wrenchsize 22)

Weight DST P92S with M12x1 PBT: ca. 50 g

Operating chassis temperature
Ratiometric voltage variant

Operating chassis temperature
Current variant

DT04

DST P92S G¼ with DT04x1 PBT: 65 x 22 x 26 mm (wrenchsize 22)

-40 °C – 85 °C

Electrical connection

4.3 Technical drawings

M1¼¼2x1 , 5-pole PBT DT04, 4-pole PBT

Ø21.3

Ø21.3

G¼ ¼ NPT 7/16-20 UNF 9/16-18 UNF

Pressure connection

16 | © Danfoss | DCS (im) | 2020.01

G¼

14 NPT

7/16-20 UNF
(SAE 4)

9/16-18 UNF
(SAE 8)

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

4.4 Pin conguration

M12x1 DT04

Pin 1: VCC Power supply
Pin 2: SIG2 Inverse pressure signal output
Pin 3: GND Common ground
Pin 4: SIG1 Pressure signal output
Pin 5: - Do not connect

4.5 Wiring diagram

4.6 Safety functions

Pin 1: VCC Power supply
Pin 2: GND Common ground
Pin 2: SIG2 Inverse pressure signal output
Pin 4: SIG1 Pressure signal output

© Danfoss | DCS (im) | 2020.01

The pressure transmitter DST P92S executes following safety function:

Safety function Safety integrity Error reaction DTI

safe conversion of the measured pressure into two
proportional redundant-opposing current signals
or ratiometric voltage signals
(0..100 %FS correspond to 4..20 mA or

0..100 %FS correspond to 10% * VCC .. 90% * VCC)

IEC 61508 / SIL-2
EN ISO 13849 / PLd
ISO 25119 / AgPld

“Fail safe” 80 ms

Safety relevance:

1. Accuracy of the sum of the single current

2. Maximum conversion delay

NOTE

The outputs of the DST P92S are not
safe by temselves but in combination
with a redundant signal processing.

IC.PS.P21.2A.02 | 520B7782 | 17

Safety guide | DST P92S Pressure transmitter

4.7 Diagnosis

5. Safety requirements

The DST P92S uses several mechanisms to
detect faults in the electronic circuit. Those are
realized in a start-up and a cyclic diagnosis.

Cyclic Diagnosis

The cyclic diagnosis is made every 30-40ms and
includes:

• testing of the temperature sensor element

Start-Up Diagnosis

The start-up diagnosis is made once after
powering the DST P92S and includes internal
tests concerning e.g. the oscillator, the
watchdog or any memory. If the start-up

• testing of the pressure sensor concerning
drift, open circuit and short circuit

• testing of the sensor signal range

If the cyclic diagnosis detects a fault, the “Fail safe”

is entered as long as the fault is pending.
diagnosis detects a fault, the “Fail safe” is
entered. The DST P92S remains in the safe state.

The following diagram shows the pressure transmitter DST P92S is a typical application

Sensor_Y_DST P92S

NOTE

Information:
Safety requirements within this manual
are characterized by an identier like
SR_DST P92S_<index>. This can be
used to trace requirements that shall
be followed through the development
process of the application.

18 | © Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

5.1 Known issues

5.2 Instructions and constraints

NOTE

There are no known issues for the
DST P92S

Safety standards

REQUIREMENT

SR_DST P92S_001:
The current national and international
safety regulations, laws, and standards
for the whole safety lifecycle have to be
observed.

Qualication of sta

REQUIREMENT

SR_DST P92S_002:
The pressure transmitter DST P92S must
be installed and operated by trained,
qualied personnel only. The knowledge
and the technical implementation of
the safety information provided by
this manual are imperative for a safe
installation and operation.

Method statement

REQUIREMENT

SR_DST P92S_003:
Before setting the DST P92S into
operation for an application it is
necessary to read and follow the
instructions of this safety manual.
The limits of the technical data (see
“Technical Data” item 4.2) must be
complied within the application.

Proof test interval

REQUIREMENT

SR_DST P92S_004:
A proof test interval of the pressure
transmitter DST P92S must be initiated
and controlled every 7½ years.
As the DST P92S can not be recalibrated,
it has to be replaced, if the deviations
exceed the maximum tolerances.

Troubleshooting procedures

REQUIREMENT

SR_DST P92S_005:
A faulty transmitter must be replaced
immediately. There is no maintenance or
repair procedure provided for the
DST P92S

CE Conformity

REQUIREMENT

SR_DST P92S_014:
For CD conformity the following
restrictions have to be observed:
The length of the cables, which are
connected to pressure transmitter, must
not exceed 30 m.

© Danfoss | DCS (im) | 2020.01

5.3 Fail Safe

The state fail safe of the pressure transmitter
DST P92S

Type of DST P92S Signal State fail safe M12 DT04

Current variant

Ratiometric voltage
variant

The safe state is entered when the DST P92S
recognizes a fault condition.

Both outputs go into the safe state simultaneous.

Output SIG1 Iout < 2 mA Pin 4 Pin 4

Output SIG2 Iout < 2 mA Pin 2 Pin 3

Output SIG1 Uout < 5% * VCC Pin 4 Pin 4

Output SIG2 Uout < 5% * VCC Pin 2 Pin 3

NOTE

Specication:
The maximum time between a fault
occurrence and the safe state of the
DST P92S is 80 ms.

REQUIREMENT

SR_DST P92S_006:
The fault detection cycle of the
superordinate logic system must be long
enough to detect an error reliably.

IC.PS.P21.2A.02 | 520B7782 | 19

Safety guide | DST P92S Pressure transmitter

Example:

The following time diagram shows the DST P92S
in a typical “sensor-logic-actuator” application
e.g. with and electronic control unit.

DST P92S Operation Interval

DST P92S Safe state

Reset condition

NOTE

Specication:
If a fault condition isn’t pending
continously, the DST P92S will leave the
safe state earliest after 60 ms.

REQUIREMENT

SR_DST P92S_007:
The diagnostic test interval of the
superordinate logic system must be short
enough to detect the safe state reliably.

5.4 System

System overview

Restrictions

WARNING

The safe state may not be entered during
an over- or under-voltage condition or
during startup. Possibly occurring spikes
on the outputs have to be ignored.

REQUIREMENT

SR_DST P92S_022:
The superordinate logic system has
to consider non-functional operating
modes, which do not lead to a safe state.

20 | © Danfoss | DCS (im) | 2020.01

REQUIREMENT

SR_DST P92S_008:
Exceeding the maximum supply voltage
of the DST P92S may cause an unsafe
operation. Therefore the superordinate
logic system has to monitor the sensor
power supply.

DST P92S

REQUIREMENT

SR_DST P92S_018:
Take measures to avoid an overvoltage
condition at the DST P92S.

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

REQUIREMENT

SR_DST P92S_009:
Running the DST P92S outside its
temperature limits may cause an unsafe
operation. Therefore the superordinate
logic system has to monitor the ambient
temperature.

REQUIREMENT

SR_DST P92S_019:
There have to be taken measures to
avoid an over- or under-temperature
condition at the DST P92S.

5.5 Pressure

The pressure is measured by a welded thin-lm
capsule, which converts the physical pressure
into an electrical signal by resistor full-bridge.
An additional temperature meander makes
itpossible to compensate the signal.

Functional diagram

REQUIREMENT

SR_DST P92S_021:
The chassis, in which the DST P92S is
mounted, has to be connected to the
power supply ground, to fulll the EMC
requirements.

© Danfoss | DCS (im) | 2020.01

REQUIREMENT

SR_DST 92S_010:
Because the radius of the pressure
channel of the DST P92S is very small,
measures must be taken for the pressure
system to prevent its clogging.

REQUIREMENT

SR_DST P92S_011:
Running the DST P92S outside its
temperature limits may cause an unsafe
operation. Therefore, the superordinate
logic system has to monitor the pressure
medium temperature.

REQUIREMENT

SR_DST 92S_024:
The thread shall be made of stainless
steel and shall be free of lubricant.

RECOMMENDATION

Avoid to exceed the specied pressure
ranges of the used DSR P92S. For a
smooth operation the pressure system
should be able to provide a stable non­uctuating pressure.
The accuracy of the pressure
measurement is only guaranteed under
reference conditions, that means if
the medium temperature and the
ambient temperature is nearly the same.
Therefore measures should be taken to
eect this.

IC.PS.P21.2A.02 | 520B7782 | 21

Safety guide | DST P92S Pressure transmitter

WARNING

A drift of the measurement cell due to an
overpressure as well as an aging-related
drift can only be detected at the pressure
limits (0 %FS, 100 %FS) of the DST P92S.

5.6 Outputs

The outputs of the DST P92S are designed as
redundant inverted signals. The inverted signals
can be used to establish a redundant signal
processing for safety-related applications.

Signal diagram

Output signal Range of current variant Range of ratiometric voltage

variant

SIG1 4 – 20 mA 10% * VCC – 90% * VCC

SIG2 20 – 4 mA 90% * VCC – 10% * VCC

90% VCC /
20 mA

SIG2

10% VCC /
4 mA

REQUIREMENT

SR_DST P92S_012:
The superordinate logic system has to
provide safety-related input pairs, which
fulll the reservations of the
DST P92S outputs (see technical data
(see “Technical Data” item 4.2).
(Especially the requirements for the
minimum and maximum loading of the
current outputs have to be observed.)

REQUIREMENT

SR_DST P92S_020:
The superordinate logic system
has to process both output signals
simultaneously and to compare them in
a meaningful way.

SIG1

REQUIREMENT

SR_DST P92S_013:
The measured pressure is always
represented by output 1. Output 2 must
only be used for the safety function,
as it is not calibrated and temperature
compensated.

REQUIREMENT

SR_DST P92S_017
The superordinate logic system has to
check, if there is a short circuit between
the DST P92S outputs. Depending on the
applications, this must be done cyclically
or at start-up.

22 | © Danfoss | DCS (im) | 2020.01

RECOMMENDATION

For signal processing the two output
values should be accumulated by
the application and be compared to
predened limits (e.g. 24 mA ± 3 %FS).

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

Outputs of ratiometric voltage variant

With the ratiometric voltage variant the supply
and outout pins of the signal conditioning are
directly connected to the connector.

Output of current variant

With the current variant the signal conditioning
is supplied via a DC/DC converter and its outputs
are used to generate the current signals.

REQUIREMENT

SR_DST P92S_015:
A ratiometric voltage value of <7.5%*VCC
or >92.5%*VCC may be the result of
a damaged DST P92S. Therefore,, the
superordinate logic system must be able
to check the current range and react on
an invalid value.

REQUIREMENT

SR_DST P92S_025:
In case of an electronic ground loss
(GND), the two output signals have no
dened level. The superordinate logic
system must perform a plausibility check
of the two output signals (See SR_DST
P92S_020 and SR_DST_P92S_017).

© Danfoss | DCS (im) | 2020.01

REQUIREMENT

SR_DST P92S_016:
A current value < 3.5 mA or > 20.5 mA
may be the result of a damaged
DST P92S. Therefore the superordinate
logic system must be able to check the
current range and react on an invalid
value.

RECOMMENDATION

To check, if there is a short circuit
between the DST P92S current outputs,
one of them could be additional loaded,
e.g. with a programmable pull-down
resistor. The other one should not
change its value.

RECOMMENDATION

If the inputs of superordinate logic
system do not provide suitable load
resistors as required in the technical
data (see “Technical Data” item 4.2 ),
an additional series resistance can
be connected to the wiring. (See
“Examples”)

IC.PS.P21.2A.02 | 520B7782 | 23

Safety guide | DST P92S Pressure transmitter

5.7 Decommissioning and disposal 5.8 Security

NOTE

For the DST P92S there has nothing to be
considered regarding decommissioning.
The disposal of the DST P92S has to be
done according to national laws.

6. Transport and storage

7. Maintenance There is no main tenance or repair procedure

8. Mounting

Transport

Check the pressure transmitter for possible
transport damage.
Do not use damaged deivces.

provided for the DST P92S (See “Instructions
and Constraints” item 5.2).

Preconditions

• Provide an ESD suitable environment

• Provide a dry and clean environment

• The thread and all sealing faces of the
pressure transmitter must be undamaged
and clean

• Apply the force to screw the pressure
sensor only through the spanner ats
provided for this purpose

• Select a cable diameter that matches the
cable connector of the mating plug

• Protect the cable end from humidity.
Otherwise humidity can intrude into the
instrument

See Mechanical Dimensions r needed space.

WARNING

Danger of serious injury and/or damage
to the equipment, when used beyond
the specied operative range.

Ensure to select the right type of
pressure transmitter according to:

• pressure range

• measurement range

• specic measurement conditions

NOTE

For the DST P92S there has nothing to be
considered regarding security.

Storage

Store the pressure transmitter in its original
packaging.
Remove the packaging only immediately before
mounting. The packaging provides protection
during storage and transport.

Required tools

Torque wrench: Width across ats 22

How to mount

WARNING

Danger of serious injury from sudden
escaping pressurized media.

Before opening any connections, make
sure to:

• Disconnect energy source

• Prevent reconnection

• Depressurize the system, including
pressure accumulators, lower upheld
load or provide compression-resistant
support for upheld load, remove
resifual energy

• Test the system for absence of
pressure

• Prevent danger due to adjacent
systems components

1. Screw the DST P92S into your system by
hand. Do not damage the thread, otherwise
a sealing connection cannot be established.

2. Tighten the DST P92S with the torque
wrench and a maxmimal screwing-torque of
35 Nm

3. Connect the connector with opposite plug:
Make sure the sealing of the connector is
present. Make sure to latch the connector
into the opposite plug.

4. Attach the used cables for DST P92S with
a cable relief. No force must act on the
connector and cables. Do not bend the cable
with a radius smaller than 18 mm.

24 | © Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782

Safety guide | DST P92S Pressure transmitter

9. Dismounting Preconditions

• Provide an ESD suitable environment

• The connected pressure transmitter must
be cleaned

• Apply the force to screw o the pressure
transmitter only through the spanner ats
provided for this purpose

Required tools

Wrench: Width across ats 22

How to dismount

WARNING

Danger of serious injury from sudden
escaping pressurized media.

Before opening any connections, make
sure to:

• Disconnect energy source

• Prevent reconnection

• Depressurize the system,
including pressure accumulators,
lower upheld load or provide
compression-resistant support for
upheld load, remove resifual energy

• Test the system for absence of
pressure

• Prevent danger due to adjacent
systems components

1. Make sure the system is depressurized.

2. Remove cable relief from the cables. Do not
damage the cables.

3. Disconnect the connetor from mating plug.

4. Screw of DST P92S from your system with
the wrench. Do not damage the threads.

© Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782 | 25

Danfoss A/S
Industrial Automation
Nordborgvej 81
DK-6430 Nordborg
Denmark

www.ia.danfoss.com

© Danfoss | DCS (im) | 2020.01

IC.PS.P21.2A.02 | 520B7782 | 26