Enocean Ptm 535z User manual

PTM 535Z 2.4 GHz Pushbutton Transmitter

USER MANUAL

Patent protected:

WO98/36395, DE 100 25 561, DE 101 50 128,

WO 2004/051591, DE 103 01 678 A1, DE 10309334,

WO 04/109236, WO 05/096482, WO 02/095707,

US 6,747,573, US 7,019,241

Observe precautions! Electrostatic sensitive devices!

PTM 535Z 2.4 GHz Pushbutton Transmitter

31 May 2016

PTM 535Z 2.4 GHz Pushbutton Transmitter

USER MANUAL

REVISION HISTORY

The following major modifications and improvements have been made to this document:

Version

Author

Reviewer

Date

Major Changes

1.0

MKA

MH, MF

01.03.2016

Initial Release

1.1

MKA

02.05.2016

Minor corrections

1.2

MKA

31.05.2016

Added appendix on telegram analysis

Published by EnOcean GmbH, Kolpingring 18a, 82041 Oberhaching, Germany

www.enocean.com, info@enocean.com, phone +49 (89) 6734 6890

Important!

This information describes the type of component and shall not be considered as assured

characteristics. No responsibility is assumed for possible omissions or inaccuracies. Circuitry

and specifications are subject to change without notice. For the latest product specifications,

refer to the EnOcean website: http://www.enocean.com.

As far as patents or other rights of third parties are concerned, liability is only assumed for

modules, not for the described applications, processes and circuits.

EnOcean does not assume responsibility for use of modules described and limits its liability to

the replacement of modules determined to be defective due to workmanship. Devices or sys-

tems containing RF components must meet the essential requirements of the local legal au-

thorities.

The modules must not be used in any relation with equipment that supports, directly or indi-

rectly, human health or life or with applications that can result in danger for people, animals

or real value.

Components of the modules are considered and should be disposed of as hazardous waste.

Local government regulations are to be observed.

Packing: Please use the recycling operators known to you.

PTM 535Z 2.4 GHz Pushbutton Transmitter

USER MANUAL

TABLE OF CONTENT

1GENERAL DESCRIPTION .................................................................................5

1.1 Basic functionality .........................................................................................5

1.2 Technical data...............................................................................................6

1.3 Physical dimensions .......................................................................................6

1.4 Environmental conditions................................................................................6

1.5 Packaging information....................................................................................6

1.6 Ordering information......................................................................................6

2FUNCTIONAL INFORMATION ...........................................................................7

2.1 PTM 535Z Device Overview.............................................................................7

2.2 Basic Functionality.........................................................................................7

2.3 Device interface signals..................................................................................8

2.4 Power supply ................................................................................................8

2.5 Input signals.................................................................................................9

2.5.1 PTM 535Z input status encoding ..............................................................9

2.6 Hardware configuration interface ................................................................... 10

2.6.1 Hardware-based security mode selection ................................................ 10

2.6.2 Hardware-based radio channel selection ................................................. 11

2.7 Radio interface............................................................................................ 12

2.7.1 Antenna.............................................................................................. 12

2.7.2 Supported Radio Channels .................................................................... 12

2.7.3 Radio channel selection ........................................................................ 13

2.8 Operation modes......................................................................................... 14

2.8.1 Data mode.......................................................................................... 14

2.8.2 Commissioning mode ........................................................................... 15

2.8.2.1 Entry into commissioning mode .......................................................... 16

2.8.2.2 Commissioning telegram.................................................................... 16

2.8.2.3 Radio channel adjustment .................................................................. 16

2.8.2.4 Determining the correct radio channel ................................................. 17

2.8.2.5 Storing the new radio channel and return to data mode ......................... 17

2.9 Security modes ........................................................................................... 18

2.9.1 Selecting the security mode .................................................................. 18

2.9.2 Security parameters............................................................................. 18

2.10 Number of redundant telegrams.................................................................... 19

3IEEE 802.15.4 Frame Structure ..................................................................... 20

3.1 PHY Header ................................................................................................ 21

3.2 MAC Header................................................................................................ 22

3.3 MAC Trailer................................................................................................. 22

3.4 MAC Payload............................................................................................... 22

PTM 535Z 2.4 GHz Pushbutton Transmitter

USER MANUAL

3.4.1 MAC payload structure for secure data telegrams..................................... 23

3.4.2 MAC payload structure for secure commissioning telegrams ...................... 24

3.4.3 MAC payload structure for standard data telegrams ................................. 25

3.4.4 MAC payload for standard commissioning telegrams................................. 26

4Device Integration ....................................................................................... 27

5APPLICATION INFORMATION......................................................................... 28

5.1 Transmission range ..................................................................................... 28

5.2 Duty Cycle.................................................................................................. 28

6REGULATORY INFORMATION......................................................................... 29

6.1 FCC (United States) Certification ................................................................... 29

6.1.1 FCC (United States) Labeling Requirements ............................................ 29

6.1.2 FCC (United States) Certificate .............................................................. 29

6.1.3 FCC (United States) Regulatory Statement.............................................. 30

6.2 IC (Industry Canada) Certification ................................................................. 31

6.2.1 IC (Industry Canada) Labeling Requirements .......................................... 31

6.2.2 IC (Industry Canada) Certificate ............................................................ 31

6.2.3 IC (Industry Canada) Regulatory Statement............................................ 32

AUnderstanding PTM 535Z telegram structure................................................... 33

A.1 Installation instructions for TI CC2531 packet sniffer ....................................... 33

A.1.1 CC2531EMK setup ................................................................................... 33

A.2 Configuration .............................................................................................. 34

A.3 Data capture............................................................................................... 36

A.4 Interpretation of the telegram data................................................................ 37

A.4.1 MAC Payload........................................................................................... 37

A.4.2 Device ID ............................................................................................... 37

A.4.3 Sequence Counter ................................................................................... 37

A.4.4 Command payload................................................................................... 38

A.4.5 Telegram Signature ................................................................................. 38

PTM 535Z 2.4 GHz Pushbutton Transmitter

USER MANUAL

1GENERAL DESCRIPTION

1.1 Basic functionality

PTM 535Z enables the realization of energy harvesting wireless switches for EnOcean sys-

tems communicating based on the 2.4 GHz IEEE 802.15.4 radio standard.

PTM 535Z is primarily intended for operation in conjunction with the EnOcean ECO 200 energy

harvester. ECO 200 can be either mechanically connected using two contact pairs or connect-

ed to the electrical interface of PTM 535Z.

Upon detection of energy pulses from the ECO 200 harvester, PTM 535Z will read the status

of additional input signals (on-board meander contact, external input signals) and report the

result as IEEE 802.15.4 radio telegram. Both secure and normal transmission modes are sup-

ported.

PTM 535Z telegram format has been defined to maximize compatibility with a wide range of

devices including such supporting the ZigBee Green Power standard. PTM 535Z radio tele-

grams are protected with AES-128 security based on a device-unique private key.

PTM 535Z contains a learn button (LRN) to send dedicated commissioning telegrams and to

change the radio channel. Radio channel and security mode can also be selected using the

hardware configuration interface consisting of six zero Ohm resistor pads (R1 … R6).

PTM 535Z provides a five pad external electrical interface with the following signals:

External connection to ECO 200 (AC1 and AC2)

Two external input signals (IN1 and IN2)

Ground (GND)

PTM 535Z is mechanically compatible with the outline of existing PTM 33x modules. Figure 1

below shows PTM 535Z.

Figure 1 –PTM 535Z Product Outline

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

1.2 Technical data

Antenna

Integrated PCB antenna

External 50 Ohm whip antenna (optional)

Radio Standard

IEEE 802.15.4 (2.4 GHz)

Supported Radio Frequency Range

IEEE 802.15.4 radio channel 11 … 26 (default: channel 11)

Radio Channel Selection

HW-configurable (0 Ohm resistor pads)

User-selectable (Commissioning)

Commissioning

Learn Button (on-board)

Security

AES128 with Sequence Code

(Can be disabled via HW configuration)

Transmit Power (typ, at 25°C)

+2 dBm

Power Supply

ECO 200 Kinetic Energy Harvester

Harvester Interface

2 pairs of contacts

On-board Button Interface

1 meander contact

External Interface

5 pins (solderable)

2 ECO 200 contacts, 2 button inputs, Ground

Certification

R&TTE (Europe)

1.3 Physical dimensions

Module Dimensions

26.2 x 21.15 x 3.5 mm

Module Weight

1.4 Environmental conditions

Operating Temperature

-25°C ... 65°C

Storage Temperature

-25°C ... 65°C

Humidity

0% to 95% r.h. (non-condensing)

1.5 Packaging information

Packaging Unit 100 units

Packaging Method Tray / Box (10 units per tray, 10 trays per box)

1.6 Ordering information

Type

Ordering Code

Frequency

PTM 535Z

S3071-A535

2.4 GHz (IEE 802.15.4)

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2FUNCTIONAL INFORMATION

2.1 PTM 535Z Device Overview

The radio transmitter device PTM 535Z from EnOcean enables the implementation of wire-

less remote controls without batteries. Power is provided by an external power generator

(typically ECO 200).

PTM 535Z device transmits data based on the 2.4GHz IEEE 802.15.4 standard.

Key components of PTM 535Z are shown on the picture below.

Note that two contact pairs of AC1 and AC2 are located on the bottom side of the PCB and

therefore not visible in the picture.

Figure 2 –Electro-dynamic powered radio transmitter device PTM 535Z

2.2 Basic Functionality

PTM 535Z devices contain an interface with two pair of signals (AC1 and AC2) used to con-

nect an external energy generator (ECO 200). Having two contact pairs improves the me-

chanical design flexibility.

Upon detection of an energy pulse, PTM 535Z reports the status of the on-board meander

contact (M1), the external input signals IN1 and IN2 and the polarity of ECO 200 action

(press or release).

“Press” is defined within the scope of this document as a move of a mechanically connected

ECO 200 away from the PTM 535Z PCB while “Release” is defined as a move towards the

PTM 535Z PCB

Radio telegrams are transmitted using the on-board antenna (ANT). An external antenna

(EXT_ANT) can optionally be used, capacitor CA needs to be removed in that case. Radio

telegram format has been defined to maximize compatibility with a wide range of devices

including such supporting the ZigBee Green Power standard.

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.3 Device interface signals

Table 1 below summarizes key elements and interface signals of PTM 535Z.

NAME

DESCRIPTION

NAME

DESCRIPTION

AC1

Input 1 from ECO 200

AC2

Input 2 from ECO 200

IN1

External input 1

IN2

External input 2

ANT

On-board PCB antenna

EXT_ANT

External antenna

Meander contact

LRN

Learn button

R1 … R6

Configuration resistors

GND

Ground

Table 1: PTM 535Z key elements and interface signals

The PTM 535Z device interface is described in more detail below.

2.4 Power supply

PTM 535Z is intended to be supplied by a connected ECO 200 kinetic energy harvester. ECO

200 can be connected to PTM 535Z in the following ways:

Mechanical connection to one of the two pairs of AC1 / AC2 pads

Use of a suitable mechanical design is required to reliably fixate the ECO 200 contacts

with the AC1 / AC2 connection pads

Electrically connected using the AC1 / AC2 signals of the external interface

Figure 3 below illustrates the mechanical connection between an ECO 200 kinetic energy

harvester and PTM 535Z.

Note that two pairs of contacts are provided by PTM 535Z to enable two orientations of ECO

200 (spring facing down = red lines / spring facing up = yellow lines) depending on the

requirements of the customer mechanical design.

Figure 3: Mechanical connection between ECO 200 and PTM 535Z

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.5 Input signals

PTM 535Z data transmits telegrams indicating the status of the following input signals:

ECO 200 action direction (press or release)

Press indicates a move away from the PCB (and the ECO 200 contacts)

Release indicates a move towards the PCB (and the ECO 200 contacts)

On-board meander contact (M1)

This meander contact is intended for use with a conductive rubber button and is consid-

ered to be active if it is closed.

Contact EnOcean for reference on suitable rubber contact mats if required.

External input signals (IN1 and IN2)

PTM 535Z provides and internal pull-up resistor on these signals.

These inputs are considered active if they are connected to Ground (GND).

2.5.1 PTM 535Z input status encoding

Table 2 below shows the encoding used by PTM 535Z.

Input 2 (IN2)

Input 1 (IN1)

Meander (M1)

ECO 200

Command

0 = Not Connected to GND

1 = Connected to GND

0 = Open

1 = Closed

Press= Move away from PCB

Release = Move towards PCB

Release

0x23

Press

0x22

Release

0x12

Press

0x13

Release

0x14

Press

0x15

Release

0x16

Press

0x17

Release

0x18

Press

0x19

Release

0x1A

Press

0x1B

Release

0x1C

Press

0x1D

Release

0x1E

Press

0x1F

Table 2: PTM 535Z input status encoding

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.6 Hardware configuration interface

PTM 535Z provides a hardware configuration interface based on six zero Ohm resistor foot-

prints (R1 … R6).

Populating these resistors allows customer-specific adaption of the following parameters:

Hardware-based security mode selection

Hardware-based radio channel selection

2.6.1 Hardware-based security mode selection

By default, PTM 535Z transmits securely authenticated data telegrams based on AES128

encryption standard using a 16 byte device-unique secret key and a 4 byte sequence

counter.

For certain applications it might be desirable to transmit data telegrams without sequence

counter and device security key / telegram signature. PTM 535Z can be configured to do so

by populating configuration resistor R2.

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.6.2 Hardware-based radio channel selection

By default, the radio channel used by PTM 535Z can be changed by the user during com-

missioning as described in chapter 2.8.2.3.

For certain applications it is desirable to pre-configure the radio channel in a way that it

cannot be modified by the user.

This can be achieved by populating configuration resistor R1. If this resistor is populated

then the radio channel used by PTM 535Z will exclusively be determined by configuration

resistors R3 … R6 as shown in Table 3 below.

Using the LRN button, the user will trigger the transmission of a commissioning telegram,

but he cannot modify the radio channel.

Channel

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Not populated

Populated

Table 3: Resistor encoding for HW-based radio channel selection

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.7 Radio interface

2.7.1 Antenna

PTM 535Z transmits data based on an on-board PCB antenna (ANT). An external 50Ω whip

antenna connected to the EXT_ANT pin can alternatively be used. Connection to the inter-

nal antenna has to be cut in this case by removing capacitor CA.

Please check with EnOcean if you intend to use an external antenna.

2.7.2 Supported Radio Channels

PTM 535Z supports all sixteen IEEE 802.15.4 radio channels in the 2.4 GHz band (channels

11 … 26 according to IEEE 802.15.4 notation).

Table 4 below shows the correspondence between channel number and channel frequency

(in MHz).

Table 4: IEEE 802.15.4 Radio Channels and Frequencies (in MHz)

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.7.3 Radio channel selection

The radio channel used by PTM 535Z can be selected in two ways:

User selection (using LRN button, default mode)

If configuration resistor R1 is not populated (default) then the radio channel can be se-

lected by the user as described in chapter 2.8.2.3

HW selection (using configuration resistors, requires R1 to be populated)

If configuration resistor R1 is populated then the radio channel used by PTM 535Z is

fixed exclusively by the configuration resistors R3 … R6 as discussed in chapter 2.6.2.

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.8 Operation modes

PTM 535Z can operate in two modes:

Data mode

Data mode is used to transmit data telegrams reporting the status of PTM 535Z button

inputs

Commissioning mode

Commissioning mode is used to commission (learn, teach-in) PTM 535Z into a specific

receiver or network. To do so, PTM 535Z will identify its capabilities and its security pa-

rameters and –if required –change the radio channel it uses for telegram transmission.

2.8.1 Data mode

Data mode is the standard mode of operation. In this mode, PTM 535Z will transmit data

telegrams identifying the status of its inputs.

PTM 535Z uses the following sequence to identify and transmit input status:

1. Determine polarity of ECO 200 pulse (to identify press or release direction)

2. Read input status of all signals

3. Calculate data part of IEEE 802.15.4 radio telegram

4. Calculate security part of IEEE 802.15.4 radio telegram (if security is enabled)

5. Transmit radio telegram

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.8.2 Commissioning mode

Commissioning mode provides two key functions:

Transmission of a commissioning telegram in order to learn-in PTM 535Z into a network

Radio channel selection in order to set the radio channel of PTM 535Z to that used by the

network

Figure 4 below shows the commissioning state chart used by PTM 535Z.

Figure 4: Commissioning state chart used by PTM 535Z

The different functions are described subsequently in more detail.

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.8.2.1 Entry into commissioning mode

Commissioning mode is entered as soon as PTM 535Z detects an energy pulse from ECO

200 in “Press” direction and the LRN button is pressed.

PTM 535Z will remain in commissioning mode as long as the LRN button is pressed when-

ever ECO 200 is actuated in the “Press” direction.

2.8.2.2 Commissioning telegram

PTM 535Z will transmit a commissioning telegram on the current radio channel upon enter-

ing commissioning mode. This enables PTM 535Z to be learned into additional devices with-

out modifying the currently used radio channel.

The type of commissioning telegram depends on whether PTM 535Z operates in secure

mode or standard mode, see chapter 2.9.1. The format of the commissioning telegram is

described in chapter 3.4.

2.8.2.3 Radio channel adjustment

PTM 535Z will enter radio channel adjustment mode if it has entered commissioning mode

and again the LRN button is pressed and ECO 200 is actuated in the “Press” direction.

PTM 535Z will then set the radio channel to channel 11 and transmit a commissioning tele-

gram on this radio channel. Resetting the radio channel to channel 11 ensures that the

number of required LRN events for selecting a radio new channel is independent of the cur-

rently used radio channel

Each subsequent press of the LRN button together with ECO 200 being actuated in the

“Press” direction will then cause the radio channel to be incremented and a commissioning

telegram to be transmitted on the channel. If channel 26 has been reached, then the se-

quence will start again with channel 11.

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.8.2.4 Determining the correct radio channel

The user requires system feedback to determine if the correct radio channel has been

reached.

Several methods are possible for that, including:

Feedback from the device into which PTM 535Z is learned in

E.g. blinking a status light, toggling a connected load, moving a motor etc.

Feedback from a dedicated user interface

This could for instance instruct the user on the required key sequence and confirm cor-

rect execution

It is the responsibility of the system designer to define a suitable feedback mechanism.

2.8.2.5 Storing the new radio channel and return to data mode

If PTM 535Z has been successfully set to the desired radio channel then this radio channel

has to be stored and operation should return to data mode.

This is achieved by releasing the LRN button and actuating ECO 200 in the “Press” direc-

tion.

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.9 Security modes

PTM 535Z can operate in two security modes:

Secure mode (default, R2 not populated)

PTM 535Z operates in secure mode by default using AES128 security for data telegrams.

Security is based on a random, device-unique security key which is generated during the

production of the device.

Standard mode (if R2 is populated)

PTM 535Z can operate in standard mode for applications requiring shorter payloads and

without the need for an AES128 signature.

2.9.1 Selecting the security mode

The default operation mode is secure mode. Standard mode can be selected by populating

configuration resistor R2.

2.9.2 Security parameters

PTM 535Z transmits data is secured based on a 4 byte sequence counter, an out of the box

device-unique key and a 4 byte signature calculated based on the AES128 encryption using

CBC mode.

The current status of the sequence counter together with the device-unique key are trans-

mitted during commissioning and have to be stored by the device where PTM 535Z is

learned in. These parameters are subsequently used to authenticate received telegrams.

EnOcean can provide references for the implementation of the required routines for key

exchange and message validation upon request.

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.10 Number of redundant telegrams

For most telegram types, PTM 535Z will transmit the telegram more than once (redundant

transmission) in order to increase transmission reliability. The timing of the individual tele-

gram transmissions is random within a 5ms window.

The number of telegram transmissions is limited by the available energy and therefore de-

pendent on the telegram length (number of bytes to be transmitted).

Typically, PTM 535Z will transmit the following number of telegrams in secure mode:

2 secure data telegrams

1 secure commissioning telegram

Standard mode telegrams are shorter because the sequence counter and the security key

(commissioning telegram) / security signature (data telegram) do not need to be transmit-

ted.

Typically, PTM 535Z will transmit the following number of telegrams in standard mode:

3 data telegrams

3 commissioning telegrams

USER MANUAL V1.0

PTM 535Z –2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

3IEEE 802.15.4 Frame Structure

PTM 535Z transmits radio telegrams in the 2.4 GHz band according to IEEE 802.15.4 frame

structure. For detailed information about the IEEE 802.15.4 standard, please refer to the

applicable specifications.

The following information about the IEEE 802.15.4 frame structure is given for reference

only. Note that the data format used is little endian. This means that for multi-byte struc-

tures (such as 2 byte, 4 byte or 8 byte fields) the least significant byte (LSB) is transmitted

first. The IEEE 802.15.4 frame structure used by PTM 535Z consists of the following four

main parts:

PHY Header

The PHY header indicates to the receiver the start of a transmission and provides infor-

mation about the length of the transmission.

It contains the following fields:

-Preamble

Pre-defined sequence (4 byte, value 0x00000000) used to adjust the receiver

to the transmission of the sender

-Start of frame

Pre-defined symbol (1 byte, value 0xA7) identifying the start of the actual

data frame

-Length

1 byte indicating the combined length of all following fields

MAC Header

The MAC header provides detailed information about the frame.

It contains the following fields:

-Frame control field

2 bytes to identify frame type, protocol version, addressing and security

mode

-Sequence number

1 byte sequential number to identify the order of transmitted frames

-Address

PAN ID and address of source (if present) and destination of the telegram

PTM 535Z does not use source address and source PAN ID

MAC Payload

The MAC Payload field contains telegram control, device ID, telegram data and telegram

security (if present) fields.

The MAC Payload field structure depends on telegram type (data or commissioning) and

security mode (secure or non-secure transmission).

MAC Trailer

The MAC Trailer contains the Frame Check Sum (FCS) field used to verify the integrity of

the telegram data.

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