ams HPS-100 Automotive hydrogen sensor Datasheet

HPS-100
Automotive Hydrogen Sensor
General Description
The HPS-100 is an automotive hydrogen sensor that monitors
hydrogen concentrations of 0 – 100 Vol%. The design fulfills
Zone 2 requirements according to ATEX 100a. The predicted
concentration is transmitted to the host via the CAN bus
interface or PWM.
Ordering Information and Content Guide appear at end of
datasheet.
Key Benefits & Features
The benefits and features of HPS-100, Automotive Hydrogen
Sensor are listed below:
Figure 1:
Added Value of Using HPS-100
Benefits
Features
• High sensitivity over large
concentration range
• 0 – 100% H2 in nitrogen
• Accuracy ±2% vol.
• Resolution ±0.5% vol.
• Low cross sensitivity
• Heated field-effect transistor technology
• No detection towards HC, H2S, N2, CO, CO2, NOx
• Designed for humid environment
• Humidity influence <1% typical
• Operating humidity range 5–100% relative humidity
including condensation
• Fast response time
•
•
•
•
•
• Low power consumption
• 70 mA (typical)
• Long-term stability and reliability
• ESD and EMC protection
• Operating temperature range –40ºC to 90ºC
• Operating pressure range 0.3 – 3 bar (absolute)
• Safety integrity level and
explosion proof
• Designed for SIL2 (IEC 61508) and ATEX 100a zone 2
• Long lifetime
• IP6K7 and IP6K9K qualified with expected lifetime of 5 years
ams Datasheet
[v1-00] 2015-Apr-06
Start-up time <5s
Speed of response (t90) < 5s
Speed of recovery < 5s
CAN bus interface 500 kbit/s (ISO11898-2)
PWM output (on request)
Page 1
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HPS-100 − General Description
Applications
Hydrogen gas measurement in fuel cell systems and other
in-process applications.
Block Diagram
The functional blocks of this device for reference are
shown below:
Figure 2:
HPS-100 Block Diagram
LDO Voltage Regulation
EMC Filter
Protection
Overvoltage, reverse polarity
Timer
μController
Page 2
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Watchdog
Output Switch
Connector
Power Supply
Heater Switch
Resistor
H2-Sensor
ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 − Overview
Overview
Figure 3:
HPS-100 Overview
Process
Connection
ams Datasheet
[v1-00] 2015-Apr-06
Power & CAN
Bus Connector
Page 3
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HPS-100 − Over view
Installation
The HPS-100 is designed for process connection with metric
straight screw thread with o-ring M14x1.5 in accordance with
ISO 6149-3 (stud end) and to fit into ISO 6149-1 (port).
Recommended O-ring, 11.3±0.2, 2.2±0.08 or 11.3±0.2, 2.4±0.08
EPDM 70 “Peroxide crosslinked” or FPM 75 (Viton)
Note(s): The O-ring is currently part of the delivery
Recommended torque for fixation: 15 Nm (+10% -0%) acc.
ISO 6149-3
Recommended orientation of the sensor, see below.
Figure 4:
Recommended Mounting Position of the Sensor
Page 4
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ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 − Electrical Interface
Electrical Interface
Electrical Connector
The sensor connector is a A2105404381 - Code A with mating
connector MQS 4-pin, TE Connectivity AMP p/n 1-967640-1
Code A.
Figure 5:
Pin Coding AMP A2105404381 - Code A
2
4
1
3
Figure 6:
Pin Assignment
Pin
ams Datasheet
[v1-00] 2015-Apr-06
Function
1
Vcc
2
GND
3
CAN – High
no termination resistor
4
CAN – Low
no termination resistor
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HPS-100 − Electrical Inter face
CAN Bus Interface
This section describes the CAN bus interface that is available in
some variants of HPS-100.
Physical Interface
The physical interface is two-wire balanced. It is a high speed
CAN interface (ISO 11898-2) with bus bit rate at 500 kbit/s.
CAN Matrix
HPS-100 will send the first CAN message within 0.1 s after reset.
The repetition rate of the CAN messages is 100ms ± 2ms. The
first H 2 concentration will be delivered after 5 s. The CAN
messages prior to that will have the Not_ready bit set,
indicating that the concentration value of the message is not
valid.
In case of a warm restart (<5 s) error category 1 will be set for
10 s. The Msg Counter increments with each CAN message.
The CAN message has the ID 1120 (0x0460). The byte 7 is not
used and has the value 0.
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ams Datasheet
[v1-00] 2015-Apr-06
H P S - 1 0 0 − Electrical Interface
Figure 7:
CAN Matrix Message Layout HPS-100
System:
Name:
ID: (hex)
Datalengthcode:
Interrupt:
Transceive:
Remote:
Repetition rate:
H2AS
H2 Anode Sensor
Receiver
0x460
8
no
Tx
no
100 ms
Rev. 3.1
MSB
variables
short name
datatype
resolution
phys. range / unit
H2 Concentration
Status
H2AS_Con
byte
0.5
0 .. 100 Vol.% H2
H2AS_not_ready
H2AS_Err_Cat
H2AS_EMC_Corr
H2AS_SW
bit
2 bit
bit
bit
bit
bit
bit
2 byte
(Motorola format)
byte
H2AS_HW_Type
H2AS_HW_Rev
H2AS_Count
2 bit
6 bit
byte
Sensor not ready
Error Category
EMC correction active
Error 2
Error 3
Error 4
Error 5
Board Temperature
SW Version y.z
HW Version
Type
HW release
Msg Counter
H2AS_BT
raw range no value
0 .. 200
b7
LSB
b6
b5
b4
b3
b2
b1
b0
255
Byte-No.
Byte 0
b0
Byte 1
b9
b1
z
b8
Byte 2
Byte3
Byte 4
b1
b0
b2
b1
b10
b2
z
b5
b4
b3
b2
to be incremented each message !
b3
x
x
x
0.1
-40⁰C .. 155ͼC
0 .. 1950
1
0 .. F . 0 .. F
0.. 255
1
1
1
1
0 .. 63
0 .. 127
1
0 .. 63
0 .. 127
65535
255
x
b15
b7
y
b14
b6
y
b7
b6
b13
b5
y
b12
b4
y
b11
b3
z
z
Byte 5
Byte 5
Byte 6
Definition Error Category :
Code
0
1
2
3
Name
No Error
Performance Error
Slight functional error
Severe functional error
Description
H2AS Sensor OK
General function still given (e.g. tolerance range may be increased to x % vol.)
General function still given but high likelihood for upcoming severe error (sensor should be replaced)
Severe error, general function NOT given anymore, sensor not longer trustable (= signal not available)
Definition HW Version Type :
Code
0
1
2
3
Name
H2ES
H2AS
H2S
H2ES
Description
H2 Exhaust Sensor
H2 Anode Sensor
H2 Ambient Sensor
H2 Stack Module Vent Sensor
ams Datasheet
[v1-00] 2015-Apr-06
Type A
Type B
valid for this component!
Page 7
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HPS-100 − Electrical Inter face
Byte 0, H 2 Concentration
Figure 8:
Byte 0 Bit Order
Bit
MSB
7
6
5
4
3
2
1
LSB
0
Byte 0
X
X
X
X
X
X
X
X
This byte shows the H 2 concentration in a resolution of 0.5.
x = Concentration in % Hydrogen
(EQ1)
Byte Value = (x % H 2)* 200/ (100 % H2)
(EQ2)
x % = Byte Value *(100% H 2)/200
Range: 0 - 200 (Hexadecimal 0 - C7)
No Value: 255 (Hexadecimal FF)
Values: 0 - 100% H 2
Resolution: 0.5 =(100 % H2) / 200
The No Value is sent if there is no valid H 2 concentration
(accompanied by Not_ready bit in status byte (Byte 1))
Byte 1 Status
Figure 9:
Byte 1 Status Bit Assignment
Bit
MSB
7
6
5
4
3
2
1
Byte 1
Error 5
Error 4
Error 3
Error 2
EMC_Corr
Bit 2 Err_
Category
Bit 1 Err_
Category
LSB
0
Not_ready
This byte shows the status of the module.
Bit 0: If the Not_ready bit is set, the module is not up or not
working.
Value: 0 or 1
No Value: 1
Bit 1+2: The error category
Value: 0 - 3
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ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 − Electrical Interface
Figure 10:
Definition of Error Category
Value
Name
Description
0
No error
Sensor OK
1
Performance error
General function still given; warm start-up indication (<5s)
2
Slight functional error
General function still given but high likelihood for
upcoming severe error (sensor should be replaced)
3
Severe functional error
Severe error, general function NOT given anymore, sensor
not longer trustable (=signal not available)
Bit 3: EMC disturbance detected, compensation active
(0-no disturbance, 1-disturbance)
Bit 4 to 7: Not used.
Byte 2 + Byte 3, Board Temperature
Figure 11:
Byte 2 + Byte 3 Board Temperature Bit Order
Bit
MSB
7
6
5
4
3
2
1
LSB
0
Byte 2
X
X
X
X
X
X
X
X
Byte 3
X
X
X
X
X
X
X
X
These two bytes show the board temperature in ºC.
Range: 0 - 1950 (Hexadecimal 0 – 79E)
Value: -40 ºC to 155 ºC
No value: 65335 (Hexadecimal FFFF)
Resolution: 0.1 ºC
0-399 = -40 ºC to -0.1ºC
400 = 0 ºC
401–1950 = 0.1 ºC to 155 ºC
Byte 2 is the high byte and byte 3 the low byte.
ams Datasheet
[v1-00] 2015-Apr-06
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HPS-100 − Electrical Inter face
Byte 4, Software Version Y.Z
Figure 12:
Byte 4 Software Version Numbering Code
Bit
MSB
7
6
5
4
3
2
1
LSB
0
Byte 4
Y
Y
Y
Y
X
X
X
X
This byte shows the firmware version.
View: Y.Z
Range: 0 - 255 (Hexadecimal 0 - FF)
Value: 0.0 - 15.15 (Hexadecimal 0.0 - F.F)
Byte 5, Hardware Version
Figure 13:
Byte 5 Hardware Version Numbering Code
Bit
MSB
7
6
5
4
3
2
1
LSB
0
Byte 5
HW Type
HW Type
Rev.
Rev.
Rev.
Rev.
Rev.
Rev.
This byte is divided into two parts. The first part shows the
hardware type.
Bit 6 and 7: HW Type
Range: 0 - 3 here 1
Figure 14:
Definition of HW Version Type
HW Type
Name
0
HLS-440P type A
1
HPS-100
H2 Exhaust Sensor (H2ES Type A)
H2 Anoder Sensor (H2AS)
H2 Ambient Sensor (H2S)
2
3
Description
HLS-440P type B
H2 Stack Module Vent Sensor (H2ES Type B)
The second part of byte 5 shows the revision of the hardware.
Bit 0 - 5: Revision of the hardware.
Range: 0 - 63
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ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 − Electrical Interface
Byte 6, Msg Counter
Figure 15:
Byte 6 Message Counter Order
Bit
MSB
7
6
5
4
3
2
1
LSB
0
Byte 6
X
X
X
X
X
X
X
X
The Msg Counter byte numbers the CAN messages and is
incremented by 1 with each message
Range: 0 - 127 (Hexadecimal 0 - 7F)
Value: 0 - 127
After reaching the value 127 the counter starts from 0 again.
Byte 7, Empty
Figure 16:
Byte 7 Default Values
Bit
MSB
7
6
5
4
3
2
1
LSB
0
Byte 7
0
0
0
0
0
0
0
0
This byte is needed to fulfill the CAN data length code of 8 bytes.
This byte is not used and has the value 0.
ams Datasheet
[v1-00] 2015-Apr-06
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HPS-100 − Electrical Inter face
PWM
This section describes the PWM output that is available in some
variants of HPS-100.
Physical Interface
The electrical connector is the same as in the variants with CAN
bus interface (see Electrical Connector ).
The PWM signal is created as a differential CAN signal on pin 3
and 4. A CAN signal is said to be in a dominant state when the
signal lines are separated (a dominant bit is transmitted). When
the signal lines are at the same voltage level, the state is
recessive. Recommended circuitry to convert CAN signals to
TTL is specified in a separate document, available on request.
The PWM signal is only an output signal. No other transmitting
devices should be attached to the bus.
The PWM Signal
The PWM signal has a period time of 255 μs. The rather short
period is chosen since modern CAN transceivers do not allow
for a longer dominant state.
The duration of the recessive state can be translated into output
H 2 prediction from the sensor module. The recessive duration
(pulse width) ranges from 20 to 220 μs, which corresponds to 0
to 100% hydrogen. An error is shown as a 10 μs pulse width. At
startup the pulse width will be 255 μs (100% duty cycle) until
the first valid H 2 concentration is delivered after 5 s.
Page 12
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ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 − Electrical Interface
The figure below shows the output for 0% hydrogen (pulse
width of 20 μs).
Figure 17:
Sensor Output for 0% Hydrogen (Pulse Width of 20 μs)
The relation between detected H 2 concentration (in ppm) and
pulse width (in μs) is:
(EQ3)
H 2 = (pulse width – 20)*5000
The figure below shows the relation between H 2 prediction and
pulse width.
Figure 18:
Relation Between H2 Prediction and Pulse Width
ams Datasheet
[v1-00] 2015-Apr-06
Pulse Width
Message Type
10 μs
Error
20 μs
0% H2
21 μs
0.5% H2
…
…
219 μs
99.5% H2
220 μs
100% H2
Page 13
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HPS-100 − Specifications
Specifications
Figure 19:
Typical Characteristics
Description
Value
Sensor Function
Target gas
Hydrogen
Concentration range
0 – 100 Vol% H2 in N2
Accuracy
± 2 Vol% under typical conditions
Resolution
0.5 Vol%
Speed of response (t90)
<5 s
Speed of recovery
<5 s
Cross-sensitivity
None towards HC, H2S, N2, CO, CO2, NOx
Some influence of humidity, depending on application
conditions (typically ±1 Vol% H2)
Humidity correction by subtracting 1.5%
Start-up time
5s
Expected lifetime
5 years or 3000 operation hours
Safety
Explosion proof
Designed to fulfill Zone 2 requirements according to ATEX
100a
Self test/Error handling
Yes
Electrical
Supply voltage
8.5 –16 V
Supply current
70 mA typical @ 13.8 V and 20 ºC, increased current during
start-up phase (avg. 200 mA during first 1s)
CAN interface
Version 2.0 ISO 11898
Connector
A2105404381 - Code A
Mating Connector
MQS 4-pin, AMP 1-967640-1 Code A
ESD/Reverse polarity
Yes
Environmental
Operation temperature range
-40 ºC to 90 ºC
Storage temperature range
-50 ºC to 95 ºC
Humidity
5-100% including condensation
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ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 − Specifications
Description
Value
Operating Pressure
0.3 – 3 bar(a)
EMC
Automotive requirements
Mechanical
Dimensions (L, Ø)
L=93.5mm Ø = 30mm
Stud
M14x1.5 acc. to standard ISO 6149-3
O-ring
ID: 11.3 ± 0.2 mm, rec. cord size 2.2 ± 0.08 mm
alt. cord size 2.4 ± 0.08 mm
Weight
77 g
Material
Stainless steel and PBT GF30
Filter membrane
Pall SUPOR 450R, 0.45 μm
IP code
IP6K7 and IP6K9K
The figure below describes the specification of the different
variants of HPS-100
Figure 20:
Specification of the Different Variants of HPS-100
Description
CAN interface
CAN bit rate (kbits/s)
PWM output
ams Datasheet
[v1-00] 2015-Apr-06
Default
On Request
Version 2.0 ISO 11898
500
250
-
n.a.
n.a.
Yes
Page 15
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HPS-100 − Handling Instructions
Handling Instructions
Due to the fact that the sensor element consists of a silicon chip
facing the surrounding the following precautions have to be
taken into account:
During storage and handling avoid:
• Humidity (condensing conditions)
• Dropping (sensor must be replaced if dropped)
• Dust (especially if cap is removed)
• Mechanical impact (especially the entrance membrane)
• Electromagnetic radiation (rf fields, high magnetic fields)
In case of storage and transport it is recommended to keep the
sensor within its original packaging (plastic cap and ESD
protected bubble bag). The disassembly of any parts is not
allowed, except for the removal of the plastic cap directly before
final assembly.
Page 16
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ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 − Reference Data
Reference Data
Figure 21:
Concentration Measurement with H2 Pulse Width of 2 min and Nominal Concentration 10%, 30%,
50%, 70% and 90% vol. H2
Figure 22:
Deviation of Prediction Over Nominal Concentration
ams Datasheet
[v1-00] 2015-Apr-06
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HPS-100 − Mechanical Information
Mechanical Information
Figure 23:
Sensor Dimensions
RoHS
Green
Note(s) and/or Footnote(s):
1. Dimensions are in millimeters.
Mating Connector: Housing:
O-ring:
Page 18
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A2105404381 – code A
Contacts:
A0135454526
Seals:
A0005456980
11.3±0.2, 2.2±0.08 EPDM 70 “Peroxide crosslinked”
ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 − Ordering & Contact Information
Ordering & Contact Information
Figure 24:
Ordering Information
Ordering Code
Type
Delivery Form
Delivery Quantity
HPS-100
CAN (500 kbit/s) (1)
Individually Wrapped
Single Item
Note(s) and/or Footnote(s):
1. For availability of other variants contact ams.
Buy our products or get free samples online at:
www.ams.com/ICdirect
Technical Support is available at:
www.ams.com/Technical-Support
Provide feedback about this document at:
www.ams.com/Document-Feedback
For further information and requests, e-mail us at:
[email protected]
For sales offices, distributors and representatives, please visit:
www.ams.com/contact
Headquarters
ams AG
Tobelbaderstrasse 30
8141 Unterpremstaetten
Austria, Europe
Tel: +43 (0) 3136 500 0
Website: www.ams.com
ams Datasheet
[v1-00] 2015-Apr-06
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HPS-100 − RoHS Compliant & ams Green Statement
RoHS Compliant & ams Green
Statement
RoHS: The term RoHS compliant means that ams AG products
fully comply with current RoHS directives. Our semiconductor
products do not contain any chemicals for all 6 substance
categories, including the requirement that lead not exceed
0.1% by weight in homogeneous materials. Where designed to
be soldered at high temperatures, RoHS compliant products are
suitable for use in specified lead-free processes.
ams Green (RoHS compliant and no Sb/Br): ams Green
defines that in addition to RoHS compliance, our products are
free of Bromine (Br) and Antimony (Sb) based flame retardants
(Br or Sb do not exceed 0.1% by weight in homogeneous
material).
Important Information: The information provided in this
statement represents ams AG knowledge and belief as of the
date that it is provided. ams AG bases its knowledge and belief
on information provided by third parties, and makes no
representation or warranty as to the accuracy of such
information. Efforts are underway to better integrate
information from third parties. ams AG has taken and continues
to take reasonable steps to provide representative and accurate
information but may not have conducted destructive testing or
chemical analysis on incoming materials and chemicals. ams AG
and ams AG suppliers consider certain information to be
proprietary, and thus CAS numbers and other limited
information may not be available for release.
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ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 − Copyrights & Disclaimer
Copyrights & Disclaimer
Copyright ams AG, Tobelbader Strasse 30, 8141
Unterpremstaetten, Austria-Europe. Trademarks Registered. All
rights reserved. The material herein may not be reproduced,
adapted, merged, translated, stored, or used without the prior
written consent of the copyright owner.
Devices sold by ams AG are covered by the warranty and patent
indemnification provisions appearing in its General Terms of
Trade. ams AG makes no warranty, express, statutory, implied,
or by description regarding the information set forth herein.
ams AG reserves the right to change specifications and prices
at any time and without notice. Therefore, prior to designing
this product into a system, it is necessary to check with ams AG
for current information. This product is intended for use in
commercial applications. Applications requiring extended
temperature range, unusual environmental requirements, or
high reliability applications, such as military, medical
life-support or life-sustaining equipment are specifically not
recommended without additional processing by ams AG for
each application. This product is provided by ams AG “AS IS”
and any express or implied warranties, including, but not
limited to the implied warranties of merchantability and fitness
for a particular purpose are disclaimed.
ams AG shall not be liable to recipient or any third party for any
damages, including but not limited to personal injury, property
damage, loss of profits, loss of use, interruption of business or
indirect, special, incidental or consequential damages, of any
kind, in connection with or arising out of the furnishing,
performance or use of the technical data herein. No obligation
or liability to recipient or any third party shall arise or flow out
of ams AG rendering of technical or other services.
ams Datasheet
[v1-00] 2015-Apr-06
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HPS-100 − Document Status
Document Status
Document Status
Product Preview
Preliminary Datasheet
Datasheet
Datasheet (discontinued)
Page 22
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Product Status
Definition
Pre-Development
Information in this datasheet is based on product ideas in
the planning phase of development. All specifications are
design goals without any warranty and are subject to
change without notice
Pre-Production
Information in this datasheet is based on products in the
design, validation or qualification phase of development.
The performance and parameters shown in this document
are preliminary without any warranty and are subject to
change without notice
Production
Information in this datasheet is based on products in
ramp-up to full production or full production which
conform to specifications in accordance with the terms of
ams AG standard warranty as given in the General Terms of
Trade
Discontinued
Information in this datasheet is based on products which
conform to specifications in accordance with the terms of
ams AG standard warranty as given in the General Terms of
Trade, but these products have been superseded and
should not be used for new designs
ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 − Revision Information
Revision Information
Changes from (2014-Nov) to current revision 1-00 (2015-Apr-06)
Page
Content of Applied Sensor datasheet was updated to the latest ams design
Note(s) and/or Footnote(s):
1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision.
2. Correction of typographical errors is not explicitly mentioned.
ams Datasheet
[v1-00] 2015-Apr-06
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HPS-100 − Content Guide
Content Guide
Page 24
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1
1
2
2
General Description
Key Benefits & Features
Applications
Block Diagram
3
4
Overview
Installation
5
5
6
6
6
8
8
9
10
10
11
11
12
12
12
Electrical Interface
Electrical Connector
CAN Bus Interface
Physical Interface
CAN Matrix
Byte 0, H2_Concentration
Byte 1 Status
Byte 2 + Byte 3, Board Temperature H2AS_BT
Byte 4, Software Version Y.Z
Byte 5, Hardware Version
Byte 6, Msg Counter
Byte 7, Empty
PWM
Physical Interface
The PWM Signal
14
16
17
18
19
20
21
22
23
Specifications
Handling Instructions
Reference Data
Mechanical Information
Ordering & Contact Information
RoHS Compliant & ams Green Statement
Copyrights & Disclaimer
Document Status
Revision Information
ams Datasheet
[v1-00] 2015-Apr-06