EnOcean STM110C User manual

Rhein Tech Laboratories, Inc. Client: EnOcean GmbH
360 Herndon Parkway Model: STM110C
Suite 1400 Standards: FCC 15.231/IC RSS-210
ID’s: SZV-STM110C/5713A-STM110CHerndon, VA 20170
http://www.rheintech.com Report #: 2007284
Page 22 of 26
Appendix K: Manual
Please see the following pages.

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Patent protected:
WO98/36395
DE 100 25 561
DE 101 50 128
WO 2004/051591
DE 103 01 678 A1
RF Sensor Transmitter Module
STM110C
February 18, 2008

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STM110C
REVISION HISTORY
The following major modifications and improvements have been made to the first version of
this document:
No Major Changes
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 specifica-
tions, 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 pack-
ing 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 in-
voice you for any costs incurred.

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STM110C
TABLE OF CONTENT
1GENERAL DESCRIPTION...................................................................................... 5
1.1 Basic Functionality......................................................................................... 5
1.2 Typical Applications ....................................................................................... 5
1.3 Technical Data .............................................................................................. 6
1.4 Physical Dimensions ...................................................................................... 7
1.5 Environmental Conditions............................................................................... 7
1.6 Ordering Information ..................................................................................... 7
2FUNCTIONAL DESCRIPTION................................................................................. 8
2.1 Block Diagram .............................................................................................. 8
Module power supply........................................................................................... 8
Power control ..................................................................................................... 9
Power supply outputs .......................................................................................... 9
Wake-up timer.................................................................................................... 9
Processor..........................................................................................................10
RF transmitter ...................................................................................................10
2.2 Pin Description and operational characteristics..................................................11
2.3 Absolute maximum ratings ............................................................................13
2.4 Equivalent schematics of Inputs and Outputs ...................................................14
Equivalent schematic of WAKE and /WAKE inputs ...................................................14
Equivalent schematic of wake-up cycle time inputs CW_0 to CW_1............................14
Equivalent schematic of LED output ......................................................................15
Equivalent schematic of V_SC1 input ....................................................................15
Equivalent schematic of V_SC2 input ....................................................................16
Equivalent schematic of analog inputs AD_0 to AD_2 ..............................................16
Equivalent schematic of voltage outputs V_0UT and V_REF ......................................16
2.5 Encoding Scheme of CW and CP Input Pins ......................................................17
Wake-up cycle time............................................................................................17
Redundant retransmission...................................................................................17
2.6 Solar Energy Balance Calculation....................................................................18
2.7 Radio Telegram of STM110C ..........................................................................20
Frequency range and modulation scheme ..............................................................20
Transmission timing ...........................................................................................20
2.7 Serial Interface for module configuration .........................................................21
Serial protocol ...................................................................................................22
Command list ....................................................................................................23
2.8 Serial Data Reception via Transceiver Modules TCM 200C / TCM 210C..................27
3APPLICATIONS INFORMATION ............................................................................28
3.1 Module Mounting..........................................................................................28
3.2 Antenna Mounting ........................................................................................29
3.3 Transmission Range......................................................................................30
3.4 Connecting the solar cell ...............................................................................31
3.5 Solar Cell Handling, Soldering & Mounting........................................................32
Handling...........................................................................................................32
Soldering ..........................................................................................................32
Gluing ..............................................................................................................34
Corrosion protection ...........................................................................................35
Shade ..............................................................................................................35

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STM110C
3.6 Using an Alternative Power Supply, e.g. Battery ...............................................36
3.7 Learn Push Button........................................................................................36
4AGENCY CERTIFICATIONS..................................................................................37
4.1 FCC (United States) Certification ....................................................................37
4.2 IC (Industry Canada) Certification ..................................................................38
5SPECIFICATION OF SS3513 SOLAR CELL..............................................................39

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STM110C
1GENERAL DESCRIPTION
The extremely power-saving RF transmitter module STM110C from EnOcean enables the
implementation of wireless and maintenance-free sensors. Power supply is provided by a
solar cell. An integrated energy storage allows operation for several days in total darkness.
1.1 Basic Functionality
Three 8-bit A/D converter inputs and 4 digital inputs facilitate multifunctional detector sys-
tems, based on passive sensing components. This allows easy and convenient monitoring of
temperature, illumination, etc. – or controlling window and door states – or supervising
input voltages or input currents respectively.
Figure 1: STM110C sensor transmitter module
1.2 Typical Applications
•Building installation
•Industrial automation
•Consumer electronics
The STM110C module serves the 315 MHz air interface protocol of EnOcean. Together with
the transceiver modules TCM200 / TCM210C, this module can be easily integrated into op-
eration and control units for the realization of various application-specific system solutions.
The module is part of a powerful RF system solution from EnOcean for operation and con-
trol applications. Because the RF transmitters are self-powered, maintenance-free RF sys-
tems can be implemented.

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STM110C
1.3 Technical Data
Power supply Solar Power Generator (discrete optical cell), or 2.2 - 5.0V external
Frequency / Conducted transmission power 315.0 MHz / 12dBm
Data rate / Modulation type 125 kbps / ASK
Transmission range 300m free field, typ. 30m indoor
Module identifier individual 32-bit ID factory-programmed
EnOcean telegram type 4BS (“Four Byte Sensor”)
Telegram packet length (sub-telegram) 1.2 ms ±5%
No. of (redundant) packets 3 packets within about 40ms, delay effected at random
Input channels 3 x analog inputs (8-bit resolution), 4 x digital inputs
Spontaneous wake-up differential external trigger signal, minimum wake interval 7ms
Cyclic wake-up user-configurable (every 1, 10, 100, or 110 s, tolerance ± 20%)
Redundant retransmission user-configurable, affected at random
Illumination 100 lx up to 100.000 lx
Operation startup time with empty energy store < 10 min @ 400 lx
Operation time during total darkness > 60 h 1)
1) storage is filled @ 1000 lx (4.2V in Goldcap)
RF transmission statistically every 17 min, 100s wake-up, temperature 25°C, Goldcap formatted
Ext. power supply output 3.0 V ±3%, 1mA max., ~2.6ms (during wake-up time)
Ext. voltage reference output 2.05V ±3%, 1mA max., ~2.6ms (during wake-up time)
Input sample time after wake-up >1.7 ms
Transmitting indication output (LED) 3.0V ±3%, 2mA max., 3 x 1.2 ms within 40ms
A change of WAKE pin status forces the onboard controller instantly to check all current
analog and digital input values. In addition, a user-programmable cyclic wake-up is pro-
vided.
After wake-up, a radio telegram (input data, unique 32-bit sensor ID, checksum) is trans-
mitted in case of a change of any digital input value compared to the last sending or in case
of a significant change of measured analog values: >5LSB of AD_1 input, >6LSB of AD_0
or >14LSB of AD_2. In case of a triggered wake-up a radio telegram is sent in any case.
In case of no relevant input change, a redundant retransmission is sent after a while to
announce all current input values. Between the wake-up phases, the module is in sleep
mode for minimum power consumption.
There is a serial interface which allows to configure several parameters of the module:
-Threshold values of the AD inputs which lead to immediate radio transmission
-Manufacturer code (information about manufacturer and type of device)
In case a manufacturer code is programmed into the module and DI3=0 at wake-up the
module will transmit a dedicated teach-in telegram containing the manufacturer code.
Observe Precautions, electrostatic sensitive devices!

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STM110C
1.4 Physical Dimensions
Dimensions of PCB 21.0 x 40.0 x 9.0 mm (incl. energy store and wiring pins)
Dimensions of solar cell 35.0 x 13.0 x 1.1 mm (for details see chapter 5)
Antenna pre-installed 15 cm whip antenna
Connector: 20 pins, dual row male, grid 1.27 mm
Figure 2: STM110C package outlines
1.5 Environmental Conditions
Operating temperature -25°C up to +65 °C
Storage temperature -25°C up to +65 °C
Humidity (PCB) 0% to 95% r.h.
Humidity (Solar cell, rear side) 0% to 60% r.h., no condensate 1)
1) For corrosion protection, see chapter 3.5
The product life strongly depends on the temperature as the Goldcap used for
energy storage degrades with higher temperature. As a reference the lifetime (ca-
pacitance reduced to 70% of nominal value) of the Goldcap is reduced from
100.000 h to 5.000 h when the temperature is raised from 25°C to 65°C.
1.6 Ordering Information
Type EnOcean Ordering Code Radio Frequency Solar Cell
STM110C S3031-D110 315.0 MHz Included
STM111C S3031-D111 315.0 MHz Not included
2
1
20
19
ANT

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STM110C
2FUNCTIONAL DESCRIPTION
2.1 Block Diagram
Figure 3: STM110C block diagram
Module power supply
The supplied solar cell has been designed especially for the STM110C for maximum module
performance at smallest dimensions. The active solar area is divided into two to provide
independent module power supplies:
V_SC1: Main power supply input. Must be connected to the STM110C solar cell
(small active area) or by another external energy source respectively
V_SC2: Goldcap charging input by connecting to the STM110C solar cell (big active
area)
The capacitance of the Goldcap may be reduced after long term storage of mod-
ules without energy supply. It may take up to one day of charging until the full
capacitance is recovered.
Continuous operation at temperatures higher than 50°C may decrease the capa-
citance of the Goldcap. This will result in shorter charging times and shorter oper-
ating times in total darkness!
Power control &
wake-up timer
Redundant
retransmission
(every 70th - 140th,
every 7th - 14th,
every cyclic wake-up)
Spontaneous
wake-up
Cyclic wake-up
(every 1,10, 100,
or 110s)
Goldcap RF Transmitter
Processor
A/D
8-bit
ANT
(whip)
Active during
wake-up only
Digital
Inputs
V_REFV_OUT
Power, Data*)
AD_2
AD_1
AD_0
DI_3
DI_2
DI_1
DI_0
*) DI_x and AD_x input values are transmitted ...
- If wake-up and an input value has changed
- At wake-up and presence signal time
Ready
(power off)
GND
CW_1
CW_0
WAKE
CP_1CP_0
V_SC1
LED
WAKE
Wake-up
(power on)
V_SC2
Power control &
wake-up timer
Redundant
retransmission
(every 70th - 140th,
every 7th - 14th,
every cyclic wake-up)
Spontaneous
wake-up
Cyclic wake-up
(every 1,10, 100,
or 110s)
Goldcap RF Transmitter
Processor
A/D
8-bit
ANT
(whip)
Active during
wake-up only
Digital
Inputs
V_REFV_OUT
Power, Data*)
AD_2
AD_1
AD_0
DI_3
DI_2
DI_1
DI_0
*) DI_x and AD_x input values are transmitted ...
- If wake-up and an input value has changed
- At wake-up and presence signal time
Ready
(power off)
GNDGND
CW_1
CW_0
WAKE
CP_1CP_0
V_SC1
LED
WAKE
Wake-up
(power on)
V_SC2

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STM110C
Power control
The power control supervises V_SC1 supply and charging status of the energy store. It con-
trols the power supply for wake-up timer, microprocessor, HF transmitter and the supply
outputs.
Power supply outputs
Two power supply outputs are available:
a) V_OUT
b) V_REF (stabilized reference voltage)
The outputs are active after wake-up during the active state of the module to drive an ex-
ternal sensor user circuitry.
Wake-up timer
The wake-up timer provides user-programmable wake-up time intervals for activating the
processor and an external wake-up opportunity (WAKE pins).
Features:
Extremely low power consumption during sleeping time period
Cyclic processor wake-up configurable by user through external pin configuration
(CW_0, CW_1)
The sleep mode can be terminated immediately by changing the pin status of the
differential WAKE inputs. Note that the WAKE inputs are part of a special capacitor
circuitry that offers lowest operating power consumption (current flow at switching
over time only).
WAKE and /WAKE always have to be operated via switch-over as shown in the
following:
Figure 4: External WAKE pin circuit
A radio telegram is always transmitted after wake-up via WAKE pins!
After transmission the counter for redundant retransmission is reset to a random
number in the confi
g
ured ran
g
e.
See chapter 2.5 for configuration of wake-up cycle times.
GND
WAKE
WAKE
GND
WAKE
WAKE

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STM110C
Processor
Controls all functionalities after wake-up: First, the values of all measurement inputs are
sampled. After that, RF signal transmission is triggered if one or more of the following con-
ditions are met:
a) One of the input values has changed since the last radio transmission (one of the 4
digital inputs has changed or one of the 3 analog inputs has changed equal to or
more than a defined value of the total measurement range), or
b) Counter for redundant retransmission is elapsed
c) The wake-up has been triggered via the WAKE pins
After every RF transmission, all measurement values are stored for data comparison at
next wake-up time.
See chapter 2.5 for configuration of timing of redundant retransmission.
RF transmitter
The radio transmitter is powered up by the processor when the sending condition is posi-
tive. The output LED is activated temporarily during telegram transmission.

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STM110C
2.2 Pin Description and operational characteristics
Pin Symbol Function Operational Characteristics
5
6
7
AD_0
AD_1
AD_2
Analog inputs sampled at every
wake-up.
The analog input values are
transmitted as sensor data
bytes:
AD_0 = DATA_BYTE1
AD_1 = DATA_BYTE2
AD_2 = DATA_BYTE3
Sample moment after wake-up: 1.7 ms …
2.6 ms
Resolution: 8-bit
Input impedance: >100kΩ
(1 bit = V_REF/256 = 8mV
Accuracy vs. V_REF @25°C typ. ±2LSB,
max ±4LSB).
Relevant input change:
>5 LSB of AD_1
>6 LSB of AD_0
>14 LSB of AD_2
These default values may be changed. See
page 23
2
1
4
3
DI_0
DI_1
DI_2
DI_3
Digital inputs sampled at every
wake-up.
Digital inputs are transmitted
within sensor DATA_BYTE0
(least significant 4 bits): DI_0 =
Bit 0, DI_1 = Bit 1, DI_2 = Bit
2, DI_3 = Bit3).
DI_2 and DI_3 are also used as
serial interface pins for the con-
figuration of the module. See
page 21.
Sample moment after wake-up: 1.7 ms …
2.6 ms
Real digital TTL input with internal pull-up
(change compared to STM100!)
LOW voltage: <0.45 V
HIGH voltage: > 2.45V
Input impedance >100kΩ
18
20
WAKE
/WAKE A signal change of WAKE inputs stops sleep mode immediately.
A radio telegram is always
transmitted after wake-up via
WAKE pins! (change compared
to STM100!)
Differential input (capacitive):
- connect to GND via switch
over only
- Resistance to GND < 100 Ω
-Switch over time < 1ms
-Minimum time between wake
signals > 7ms
-Pins should be connected to
V_SC1 if not needed in
application
- max. external allowed leakage
current 100pA
12
14
CW_0
CW_1 Encoding input for processor wake-up cycle time: 1, 10, 100,
or 110 seconds approximately.
Pins should be left open or connected to
GND
Resistance to GND < 10 Ω
Cyclic wake-up time value strongly depends
on actual power supply voltage and temper-
ature (up to ±20%)
13
15
CP_0
CP_1 Encoding input for determining the number of cyclic wake-up
signals that trigger the redun-
Pins should be left open or connected to
GND
Resistance to GND < 100 Ω

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STM110C
dant retransmission: Every
wake-up signal, or every 7th -
14th, or every 70th - 140th or no
redundant retransmission.
Input impedance >100kΩ
9
V_OUT Module power supply output available during wake-up phase
to drive an external sensor cir-
cuitry by the user.
Also used for starting serial
mode.
3.0V ±3%, ~2.6ms,
IVout = 1 mA max.
10
V_REF Reference voltage output availa- ble during wake-up phase to
drive an external sensor circuit
by the user.
2.05 V ±3%, ~2.6ms,
IVref = 1 mA max.
11
LED Output for optional external LED to indicate every telegram
transmission (short flashing)
Also used for starting serial
mode.
3.0 V ±3%, 2 mA max.,
source impedance 470 Ω±1%,
~3 x 1.2 ms within 40 ms
19
V_SC1 Main power supply input. Con- nect V_SC1 in series with a
Schottky diode of Type BAS 125
to SOL1 of the STM110C solar
cell (smaller area, see Figure 9).
Or connect to another external
energy source respectively.
When using other energy source than the
supplied solar panel (see chapter 3.6):
2.2 – 5.0 V
17
V_SC2 Goldcap charging input. Connect V_SC2 in series with a Schottky
diode of Type BAS 125 to SOL2
of the STM110C solar cell (big-
ger area, see Figure 9).
For use with the solar cell only (Vo< 5.0 V)!
8
16 GND Ground connections
ANT
Whip antenna λ/4 Please find recommendations on antenna mounting in chapter 3.2
Never connect an input (like CP_0..1, AD_0..2, DI_0..3) to a permanent supply
voltage! These inputs should be always left open, connected to GND or connected
to the own V_OUT and / or V_REF (active only during measurement time!). Oth-
erwise they would permanently draw current from the permanent power supply
and could also damage the device (see absolute maximum ratings 2.3 below)
If such a function is absolutely needed, please insert a diode to avoid the problem.
For socket positions, see Figure 2.

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STM110C
2.3 Absolute maximum ratings
Symbol Parameter Min Max Units
V_SC1, V_SC2 Input voltage 0 5.5 V
V_SC1 Input current ripple 95 mA
V_SC2 Input current ripple 0.2 A
LED, V_REF,
V_OUT, DI0..3,
AD0..2, CP_0..1
Input voltage while µC not active (=
module completely switched off or sleep
timer running)
0 0.7 V
LED, DI0..3,
AD0..2 Input voltage while µC active 0 V_OUT V
V_OUT Input voltage while serial mode is active 0 3.09 V
CW_0, CW_1 Input voltage 0 V
WAKE, /WAKE Input voltage 0 V_SC1 V
ANT Input voltage 5 V
V_REF, V_OUT Output current 1 mA
LED Output current 2 mA
V_SC1, V_SC2,
CW_0, CW1,
WAKE, /WAKE,
V_OUT, V_REF,
ANT, GND
Electrostatic discharge 1 kV
CP_0, CP_1, LED,
DI_0..3, AD_0..2 Electrostatic discharge 2 kV
Module Temperature -25 65 °C
Module Humidity 95 % r.h.
Solar cell Illumination 100.000 lx
Solar cell Humidity 60 % r.h.
Exceeding these values may destroy the module!

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STM110C
2.4 Equivalent schematics of Inputs and Outputs
Equivalent schematic of WAKE and /WAKE inputs
Equivalent schematic of wake-up cycle time inputs CW_0 to CW_1
______
WAKE
WAKE
Threshold
detector
CW_0
CW_1
83n
1µ 5nA
6.8n 1M

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STM110C
Equivalent schematic of LED output
Equivalent schematic of V_SC1 input
R_C1: ~6 MΩafter 3 V applied for 10 min, >>10MΩafter 24h.
R_STM: depends on wake-up cycle time, transmit intervals and supply voltage.
In the following table R_STM is given at a supply voltage of 3V (typical values):
R_STM [kΩ] 1s 10s 100s 110s
Every wake-up 24 240 2400 2600
Every 10th wake-up (average) 63 630 6300 6900
Every 100th wake-up (average) 75 750 7500 8300
The current consumption is almost independent from the supply voltage
(typical values):
I_STM [µA] 1s 10s 100s 110s
Every wake-up 130 13 1.3 1.1
Every 10th wake-up (average) 50 5.0 0.50 0.45
Every 100th wake-up (average) 40 4.0 0.40 0.35
V_SC1
C1
470µF
R_C1
R_STM

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STM110C
Equivalent schematic of V_SC2 input
R_C2: ~375 kΩafter 3 V applied for 10 min., ~5MΩafter 24h
Equivalent schematic of analog inputs AD_0 to AD_2
Equivalent schematic of voltage outputs V_0UT and V_REF
V_SC2
C2
0.1F
R_C2
V_SC1
1M 120p
Sample Switch
Rs =
10k max
AD_x
V_OUT
V_REF
LMV 358
470
Vpulse
<1 mA
V_OUT
V_REF
LMV 358
470
Vpulse
<1 mA

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STM110C
2.5 Encoding Scheme of CW and CP Input Pins
The encoding input pins have to be left open or connected to GND in correspondence with
the following connection schemes:
Wake-up cycle time
CW_0 CW_1 Wake-up cycle time
NC NC 1 sec. ±20%
GND NC 10 sec. ±20%
NC GND 100 sec. ±20%
GND GND 110 sec. ±20%
Redundant retransmission
Via CP_0 and CP_1 an internal counter is set which is decreased at every wake-up signal.
Once the counter reaches zero the redundant retransmission signal is sent.
CP_0 CP_1 Number of wake-ups that
trigger a redundant retransmission
NC NC Every timer wake-up signal
GND NC Every 7th - 14th timer wake-up signal, affected
at random
NC GND Every 70th - 140th timer wake-up signal, affected
at random
GND GND No redundant retransmission
A radio telegram is always transmitted after wake-up via WAKE pins!
After transmission the counter is reset to a random value within the specified in-
terval.
According to FCC 15.231a) a redundant retransmission at every timer wake-up to
determine the system integrity is only allowed in safety and security applications!
In this case the total transmission time must not exceed two seconds per hour,
which means that a combination with a 1s wake-up cycle time is not allowed!
If applied in other (non-safety, non-security) applications a minimum of 10s be-
tween periodic transmissions is required. In addition the device has to comply with
the lower field strength limits of 15.231e). The limited modular approval of
STM110C is not valid in this case.

USER MANUAL V0.904
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82041 Oberhaching
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Subject to modifications
STM110C User Manual V0.904
February 18, 2008 2:00 PM
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STM110C
2.6 Solar Energy Balance Calculation
The following diagrams are showing operational performance data of STM110C.
Figure 5: Graphs of the goldcap charging process (typ. @25°C). Measured with
white light LEDs, illustration of the illumination level as fluorescent lamp equiva-
lent (EL). Measured with 100s wake up timer.
0
1
2
3
4
5
6
0 5 10 15 20 25
charging time [h]
Charging at 1000 lx
Charging at 200 lx
Charging at 50 lx
Charging at 1000 lxCharging at 1000 lx
Charging at 200 lx
Charging at 50 lx
Voltage V_SC2[V]
Charging time [h]

USER MANUAL V0.904
EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
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Phone [phone]
Fax [phone]
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www.enocean.com
Subject to modifications
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February 18, 2008 2:00 PM
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STM110C
0
1
2
3
4
5
6
051015202530
Operating time in darkness [h]
Voltage V_SC1 [V]
10 sec timer
0
1
2
3
4
5
6
0123
Operating time in darkness [h]
Voltage V_SC1 [V]
1 sec timer
0
1
2
3
4
5
6
0306090120150
Operating time indarkness [h]
Voltage V_SC1 [V]
100 sec timer
Telegram transmission at every wake up
Telegram transmission every 10th wake up
Telegram transmission every 100th wake up
Telegram transmission at every wake up
Telegram transmission every 10th wake up
Telegram transmission every 100th wake up
Voltage V_SC2[V] Voltage V_SC2[V]Voltage V_SC2[V] Voltage V_SC2[V]
Operating time in darkness [h]
Operating time in darkness [h]
Operating time in darkness [h]
Figure 6: STM110C operation time
in darkness (typ. @25°C)
(average)
(average)