EnOcean PTM 240C User Manual

USER MANUAL V1.01

EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany

Phone [phone]
Fax [phone]
[e-mail]
www.enocean.com

Subject to modifications
PTM 240C User Manual V1.01
September 26, 2008 4:13 PM
Page 1/11

Patent protected:

WO98/36395
DE 100 25 561
DE 10309334

Transmitter Module 315MHz
PTM 240C

September 26, 2008

USER MANUAL V1.01

EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany

Phone [phone]
Fax [phone]
[e-mail]
www.enocean.com

Subject to modifications
PTM 240C User Manual V1.01
September 26, 2008 4:13 PM
Page 2/11

PTM 240C

REVISION HISTORY

The following major modifications and improvements have been made to the first version of
this document:

No Major Changes

0.97 Documentation of energy pulse requirements extended

0.98 Energy pulse requirements corrected. Polarity is important!

1.00 Product released to serial production

1.01 Timing requirement for SW1, SW2 modified in section 2.2

Published by EnOcean GmbH, Kolpingring 18a, 82041 Oberhaching, Germany
www.enocean.com, [e-mail], phone ++49 (89) 6734 6890

© EnOcean GmbH
All Rights Reserved

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
systems containing RF components must meet the essential requirements of the local legal
authorities.
The modules must not be used in any relation with equipment that supports, directly or
indirectly, 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. By agreement we will take pack­ing material back if it is sorted. You must bear the costs of transport. For packing material
that is returned to us unsorted or that we are not obliged to accept, we shall have to in­voice you for any costs incurred.

USER MANUAL V1.01

EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany

Phone [phone]
Fax [phone]
[e-mail]
www.enocean.com

Subject to modifications
PTM 240C User Manual V1.01
September 26, 2008 4:13 PM
Page 3/11

PTM 240C

TABLE OF CONTENT

1

GENERAL DESCRIPTION...................................................................................... 4

1.1 Functional Principle........................................................................................ 4

1.2 Features Overview ........................................................................................ 4

1.3 Mechanical Interface...................................................................................... 5

1.4 Environmental Conditions............................................................................... 5

1.5 Ordering Information ..................................................................................... 5

2 FUNCTIONAL DESCRIPTION................................................................................. 6

2.1 Block Diagram .............................................................................................. 6

2.2 Pin Description and operational characteristics .................................................. 6

2.3 PTM 240C Radio Telegram .............................................................................. 7

2.3.1 Transmission timing ................................................................................... 7

2.3.2 Telegram Data........................................................................................... 7

2.4 Energy Pulse Requirements ............................................................................ 8

3 APPLICATIONS INFORMATION ............................................................................. 9

3.1 Antenna Mounting ......................................................................................... 9

3.2 Transmission Range .....................................................................................10

3.3 FCC/IC Approval Requirements ......................................................................11

USER MANUAL V1.01

EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany

Phone [phone]
Fax [phone]
[e-mail]
www.enocean.com

Subject to modifications
PTM 240C User Manual V1.01
September 26, 2008 4:13 PM
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PTM 240C

1 GENERAL DESCRIPTION

The radio transmitter module PTM 240C from EnOcean enables
the implementation of batteryless occupancy sensors for
applications in building technology. Power is provided by an
external short energy pulse.

The PTM 240C module serves the 315 MHz air interface protocol
of EnOcean. Together with the transceiver module TCM2xyC,
this module can be easily integrated in operation and control units for the implementation
of different application specific system solutions.

1.1 Functional Principle

When a short energy pulse is supplied to the PTM 240C module an RF telegram is transmit­ted including a 32-bit module ID. In addition the information of 2 inputs is transmitted.
These inputs shall be used in the application circuitry to connect a learn button and the
evaluation unit of a passive infrared sensor (PIR).

1.2 Features Overview

Power supply external voltage pulse
Frequency / Transmission power 315.0 MHz / typ. 3 dBm conducted
Data rate / Modulation type 125 kbps / ASK
Minimal switching interval 50 ms
Antenna 15 cm whip antenna mounted
Transmission range up to 200 m free field, up to 30m indoor

range strongly dependent on surrounding material and position relative to energy harvester or metal surfaces

Serial Telegram type 4BS (provided at TCM2xyC serial output)
Module identifier individual 32-bit ID (factory programmed)
Radio standards FCC part 15 (for use in USA and Mexico)
RSS210 Issue 6 (for use in Canada)

Observe precautions! Electrostatic sensitive devices!

USER MANUAL V1.01

EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany

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Fax [phone]
[e-mail]
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PTM 240C

1.3 Mechanical Interface

Figure: PCB Dimensions in mm

Do not connect with wrong orientation. The module may be destroyed!

1.4 Environmental Conditions

Operating temperature -25 up to +65 °C
Storage temperature -40 up to +85 °C
Humidity 0 % to 93 % r.h., non-condensing, no IP-class

1.5 Ordering Information

Type Ordering Code

PTM 240C

S3031-A240

35. 0

29.2

3.7

3.9

21. 9

2

Units mm

1

10

ANT

2

35. 0

29.2

3.7

3.9

21. 9

2

Units mm

1

10

ANT

2

USER MANUAL V1.01

EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany

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Fax [phone]
[e-mail]
www.enocean.com

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PTM 240C

Processor

HF

Power
Converter

Data

DC Power

Processor

HF

Power
Converter

Data

DC Power

Polarity

SW1

SW2

SW_HIGH

PWR 1

PWR 2

ANT

2 FUNCTIONAL DESCRIPTION

2.1 Block Diagram

Figure: Block diagram of PTM 240C

2.2 Pin Description and operational characteristics

Pin Symbol Function Operational Characteristics

3

1

PWR1

PWR2

Negative input for energy
pulse
Positive input for energy
pulse

Maximum wire length: 5cm each

See section 2.4 for requirements on
the energy pulse.

7

9

SW1

SW2

Digital inputs.
Connect SW2 to SW_HIGH
for transmission of a
teach-in telegram.
Leave SW2 open to trans­mit a data telegram. The
status of SW1 will then de­termine if “PIR ON” or “PIR
OFF” will be signalized.

No capacitive load!
Maximum wire length to SW_HIGH:
3cm each.

The signal at SW1 and SW2 must be
stable ≥ 0µs before and > 10ms after
energy is supplied to the module.
Please consider contact bouncing!

2 SW_HIGH Supply for SW1 and SW2 Maximum wire length to SW1, SW2:

3cm

4, 5, 6,

8, 10

RES Reserved Leave open!

ANT Pad for antenna mounting 15cm whip antenna as defined in 3.1

USER MANUAL V1.01

EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany

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Fax [phone]
[e-mail]
www.enocean.com

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PTM 240C

2.3 PTM 240C Radio Telegram

2.3.1 Transmission timing

The transmission timing of the radio module PTM 240C has been developed to avoid possi­ble collisions with data packages of other EnOcean transmitters as well as disturbances
from the environment.

With each transmission cycle, up to 3 identical subtelegrams are transmitted. The transmis­sion of a subtelegram lasts approximately 1.2 ms. To optimize data security, each telegram
is repeated several times within about 40 ms, whereas the delay between the second and
the third transmission burst is effected at random.

2.3.2 Telegram Data

The PTM 240C transmits an EnOcean radio telegram according to profile 0b000111 – Occu­pancy Sensor - type 0b0000001 as defined in “Standardization EnOcean Communication
Profiles V1.03”.
For detailed information on the serial protocol please refer to the user manual of TCM2xyC
and the above standardization document.

A teach-in telegram is transmitted, if SW2 is connected to SW_HIGH. This telegram con­tains the above mentioned profile an type information as well as a manufacturer ID which is
0b11111111111 (multiuser ID) in this case.

In case SW2 is left open the module transmits a data telegram with the information about
the status of the PIR sensor which has to be coded using SW1.

The information transmitted is:

 Unique factory programmed 32bit ID
 ORG, Data3, Data2, Data1, Data0 and Status as follows:

R=repeater counter

SW1 SW2 ORG Data3 Data2 Data1 Data0 Status Description

open open 0x07 0xFF 0xFF 0x00 0xFF 0x0R PIR OFF
SW_HIGH open 0x07 0xFF 0xFF 0xFF 0xFF 0x0R PIR ON
open SW_HIGH 0x07 0x1C 0x0F 0xFF 0x80 0x0R Teach-in
SW_HIGH SW_HIGH 0x07 0x1C 0x0F 0xFF 0x80 0x0R Teach-in

USER MANUAL V1.01

EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany

Phone [phone]
Fax [phone]
[e-mail]
www.enocean.com

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PTM 240C

2.4 Energy Pulse Requirements

The energy pulse hat to fulfill the following requirements:

 E

Pulse

> 0.25mWs

 U

min

=0V

 2.5V ≤ U

max,Pulse

≤ 5.5V

 0.3ms ≤ T

Pulse

≤ 25ms

Please make sure to use right polarity as specified in section 2.2!
Otherwise the module may transmit only 2 subtelegrams.

The required pulse width depends on voltage, pulse shape and source impedance.

The figure below shows how the required pulse length changes for a rectangular pulse as a
function of the open circuit voltage. The measurement has been performed with a source
impedance of 0.25 Ohm.

0

5

10

15

20

25

30

35

2.5 3.0 3.5 4.0 4.5 5.0 5.5

open circuit voltage at 0.25 Ohm source-impedance [V]

pulse length [ms]

USER MANUAL V1.01

EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany

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PTM 240C

L=15cm

3 APPLICATIONS INFORMATION

3.1 Antenna Mounting

Positioning and choice of receiver and transmitter antennas are the most important factors
in determining system transmission range. The PTM 240C modules are supplied with an­tenna. For standard applications the use of a whip antenna is recommended (L=15cm).
This antenna enables a very compact unit with good radio characteristics. For mounting the
antenna, the following notes should be considered to optimize the system performance:

Mounting a 1/4-wave whip antenna:

For good transmit performance, great care must be taken about the space immediately
around the antenna since this has a strong influence on screening and detuning the an­tenna. The antenna should be drawn out straight as far as possible and must never be cut
off. Primarily, the far end of the wire should be mounted as far away as possible from all
metal parts, PCB strip lines and fast logic components (e.g. microprocessors).

Do not roll up or twist the whip antenna!

To avoid possible damage to the module the end of the antenna should be insu­lated.

Note that 315 MHz whip antennas do not show any directional effects under free-field ra­dio-wave propagation conditions (spot-wise radiator).

Figure: Specification of whip antenna

USER MANUAL V1.01

EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany

Phone [phone]
Fax [phone]
[e-mail]
www.enocean.com

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PTM 240C

3.2 Transmission Range

The main factors that influence the system transmission range are:

 Type and location of the antennas of receiver and transmitter
 Type of terrain and degree of obstruction of the link path
 Sources of interference affecting the receiver
 “Dead” spots caused by signal reflections from nearby conductive objects

Since the expected transmission range strongly depends on these system conditions, range
tests should categorically be performed in early project phases!

The following figures for expected transmission range are considered by using the PTM
240C radio transmitter module and the TCM2xyC radio transceiver module with mounted
whip antenna and may be used as a rough guide only:

 10 m in industrial applications with metal in the vicinity
 30 m for obstructed environment (e.g., through two brick walls inside a building)
 200 m for unobstructed environment (“free field”)

Further notes to determine the transmission range within buildings are available as down­load from www.enocean.com

.

USER MANUAL V1.01

EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany

Phone [phone]
Fax [phone]
[e-mail]
www.enocean.com

Subject to modifications
PTM 240C User Manual V1.01
September 26, 2008 4:13 PM
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PTM 240C

3.3 FCC/IC Approval Requirements

Because of the very low radiated field strength on average, the EnOcean radio technology
can be approved in the USA and in Canada. If the PTM240C is operated in compliance with
the following requirements, a finished sensor unit containing this radio will comply with Part
15 of the FCC Rules and with RSS-210 of Industry Canada.

The finished radio sensor unit has to be approved by a notified body for operating free of
charge in the area of the United States of America (“FCC approval”) and in Canada (“IC
approval”).

FCC/IC operational and timing requirements:

Because of the very low average to peak factor, the (corrected) field strengths of EnOcean
transmitters meet the FCC 15.231 conditions for manually operated transmitters and the
lower field strength limit values for intentional radiators operated at a periodic rate. In ad­dition to the field strength limits, the following timing conditions have to be met with re­spect to FCC 15.231:

 Intentional radiators operated at a periodic rate:

Periodic transmissions of EnOcean modules at regular predetermined inter­vals are allowed with respect to FCC 15.231e, if the silent period between
transmissions is in no case less than 10 seconds.

 Manually operated transmitters:

▫ If transmissions are not periodic approval according to FCC 15.231a is possi-

ble. In this case the total duration of transmissions must not exceed more
than two seconds per hour for each transmitter.

▫ Under this regulation it must be ensured that the PTM240C radio sensor

module does not transmit data more than 1058 times per hour. For this tim­ing calculation the PTM240C packet length of 1.2 ms, a tolerance of 5% in
packet length, a 50% on average packet Ton/Toff ratio and all 3 redundant
packets are considered.

For details please refer to the FCC part 15 regulation, which is available for download at

http://www.fcc.gov/oet/info/rules/

.