Hella FS191S User manual

HELLA GmbH & Co. KGaA
59552 Lippstadt
FS191S
Date:
2022-09-07
Processed:
O. Kushova E-CA-D-HW
Revision: 1.2
Page 1of 10
This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
Copyright Protection: Confidential - ISO 16016
User Manual
FS191S
Passive Entry / Passive Start
radio identification devices

HELLA GmbH & Co. KGaA
59552 Lippstadt
FS191S
Date:
2022-09-07
Processed:
O. Kushova E-CA-D-HW
Revision: 1.2
Page 2of 10
This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
Copyright Protection: Confidential - ISO 16016
Content
1FS191S family overview 3
2Safety warnings and precautions 3
3Communication technologies 4
4FS191S Technical data summary 5
5FS191S pictures 6
6FS191S Modes of operation 10
6.1 Remote keyless entry (RKE) 10
6.2 Keyless Entry / Keyless Go (PKE) 10
6.3 Transponder mode 10
7Statement: 10

HELLA GmbH & Co. KGaA
59552 Lippstadt
FS191S
Date:
2022-09-07
Processed:
O. Kushova E-CA-D-HW
Revision: 1.2
Page 3of 10
This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
Copyright Protection: Confidential - ISO 16016
1 FS191S family overview
This document is to describe the FS191S family of Radio Identification Devices (RID) intended for use
in automotive Passive Entry / Passive Start systems. All family members use the same PCB layout
and basic type of housing. There are different variants regarding number of buttons, finish of the
housing, labelling of the housing etc. Images of the devices are given in chapter 5.
2 Safety warnings and precautions
Do not ingest battery, Chemical Burn Hazard
This product contains a coin / button cell battery. If the coin /
button cell battery is swallowed, it can cause severe internal
burns in just 2 hours and can lead to death.
Keep new and used batteries away from children. Should a
child swallow a battery, consult a physician immediately.
If the battery compartment does not close securely, stop
using the product and keep it away from children.
If you think batteries might have been swallowed or placed
inside any part of the body, seek immediate medical
attention.
CAUTION
Risk of explosion if the battery is replaced by an incorrect
type
Keep batteries away from direct sunlight, high temperature,
and high humidity
Please be sure to observe the following warnings. As batteries contains flammable substances such
as lithium or other organic solvents, they may cause heating, rupture or ignition
Warning
1. Do not charge, short, disassemble, deform or heat batteries. Do not throw batteries into fire.
2. When discarding batteries, insulate the positive and negative terminals of batteries with
insulating tape, etc. When disposed of improperly, lithium batteries may short, causing them
to become hot, burst or ignite.
Caution
1. Be sure to connect the positive and negative electrodes correctly.
2. Avoid mixed use of batteries, i.e. new, used or different types.
3. Avoid direct soldering to batteries.

HELLA GmbH & Co. KGaA
59552 Lippstadt
FS191S
Date:
2022-09-07
Processed:
O. Kushova E-CA-D-HW
Revision: 1.2
Page 4of 10
This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
Copyright Protection: Confidential - ISO 16016
3 Communication technologies
There are two basic communication technologies implemented in the FS191S devices:
•Low Frequency (LF) communication, used for waking up the devices and for communication
with the immobilizer system of the vehicle
•RF (UHF) communication, used for communication between radio identification devices and
vehicle

HELLA GmbH & Co. KGaA
59552 Lippstadt
FS191S
Date:
2022-09-07
Processed:
O. Kushova E-CA-D-HW
Revision: 1.2
Page 5of 10
This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
Copyright Protection: Confidential - ISO 16016
4 FS191S Technical data summary
Markets
USA, Canada
Model name
FS191S
DC Supply voltage range
Approx. 2.2V to 3.2 V
Technology
RF (UHF)
Number of RF channels (1)
3
RF channel frequencies (1)
433.46 MHz
433.92 MHz
434.36 MHz
RF radiated power
Approx. 78 dBµV/m @ 3m (average)
Mode of operation
Simplex TX only (RKE mode)
Half duplex TRX (PKE mode)
Modulation method
FSK (F1D)
Frequency deviation
+/- 7.8 KHz (RKE mode)
+/ - 20 KHz (PKE mode)
Data rate
7.8 Kbit / s (RKE mode)
19.2 Kbit / s (PKE mode)
RF Antenna
Integrated PCB loop
LF
Operating frequency
125 kHz
Modes of operation
LF detector
Passive Transponding
(1) Not all channels may be used for every RF mode of operation
Table 1: Versions of Hella FS191S

HELLA GmbH & Co. KGaA
59552 Lippstadt
FS191S
Date:
2022-09-07
Processed:
O. Kushova E-CA-D-HW
Revision: 1.2
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This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
Copyright Protection: Confidential - ISO 16016
5 FS191S pictures
The following illustrations show the exterior view of the FS191S devices.
The images are exemplary, other designs e.g. with less buttons or less side buttons or different button
labels or different button positions or different colors or different customer label or different finish may
exist.
Picture 1: FS191S (3 top buttons, no side button) top Picture 2: FS191S (3 top buttons, no side button) top
Picture 3: FS191S (4 top buttons, no side button) top Picture 4: FS191S (4 top buttons, no side button) top
Picture 5: FS191S (4 top buttons, no side button) top Picture 6: FS191S (5 top buttons, no side button) top

HELLA GmbH & Co. KGaA
59552 Lippstadt
FS191S
Date:
2022-09-07
Processed:
O. Kushova E-CA-D-HW
Revision: 1.2
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This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
Copyright Protection: Confidential - ISO 16016
Picture 7: FS191S (5 top buttons, no side button) top Picture 8: FS191S (5 top buttons, no side button) top
Picture 9: FS191S (3 top buttons, 2 side buttons) top Picture 10: FS191S (4 top buttons, 2 side buttons) top
Picture 11: FS191S (4 top buttons, 2 side buttons) top Picture 12: FS191S (5 top buttons, 2 side buttons) top
Side button
Side button
Side button
Side button
Side button
Side button
Side button
Side button

HELLA GmbH & Co. KGaA
59552 Lippstadt
FS191S
Date:
2022-09-07
Processed:
O. Kushova E-CA-D-HW
Revision: 1.2
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This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
Copyright Protection: Confidential - ISO 16016
Picture 13: FS191S (VW, no side button) back Picture 14: FS191S (Seat, no side button) back
Picture 15: FS191S (Skoda, no side button) back Picture 16: FS191S (Cupra, no side button) back
Picture 17: FS191S (Ford, no side button) back

HELLA GmbH & Co. KGaA
59552 Lippstadt
FS191S
Date:
2022-09-07
Processed:
O. Kushova E-CA-D-HW
Revision: 1.2
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This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
Copyright Protection: Confidential - ISO 16016
Picture 18: FS191S (VW, 2 side buttons) back Picture 19: FS191S (Seat, 2 side buttons) back
Picture 20: FS191S (Skoda, 2 side buttons) back Picture 21: FS191S (Cupra, 2 side buttons) back
Picture 22: FS191S (Ford, 2 side buttons) back
Side button
Side button
Side button
Side button
Side button
Side button
Side button
Side button
Side button
Side button

HELLA GmbH & Co. KGaA
59552 Lippstadt
FS191S
Date:
2022-09-07
Processed:
O. Kushova E-CA-D-HW
Revision: 1.2
Page 10 of 10
This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
Copyright Protection: Confidential - ISO 16016
6 FS191S Modes of operation
The following chapters describe the modes of operation that can be carried out by the FS191S
devices.
6.1 Remote keyless entry (RKE)
The Remote Keyless Entry (RKE) functions enable the user to control the central locking system and
other functions of a vehicle from a distance. It is always manually activated by pressing one of the
buttons on the device. When activated, the device will transmit a sequence of RF messages on two of
the available RF channels.
6.2 Keyless Entry / Keyless Go (PKE)
Keyless Entry / Keyless Go functions allow the user control of the central locking system and engine
start / stop without manual operation of the key. For these functions the devices can be woken up by a
125 kHz low frequency (LF) signal generated by the vehicle. For recognition of LF signals the devices
contain a set of 3 orthogonal sensor coils (LF antenna array) and a detection circuit that is integrated
in the main μC. For Keyless Entry / Keyless Go functions RF communication takes place in half duplex
mode on two of the available RF channels.
6.3 Transponder mode
The transponder mode serves as ab backup means for communication with the immobilizer system if
the Keyless Go function is not available for any reason. In transponder mode the device is supplied
from the magnetic field generated by the immobilizer system of the vehicle and communicates with the
vehicle using damping modulation. The nominal working frequency of the transponder system is
125 KHz. No active RF communication is used in transponder mode. Therefore, the device does not
generate or emit any RF energy in this mode.
7 Statement:
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired
operation.