Steca PA 15 User manual

Operating Manual
Remote control
Steca PA 15
703.639 | V 04.04 | 09.46
PHOTOVOLTAIK - PHOTOVOLTAIC - PHOTOVOLTAIQUE - FOTOVOLTAICA
EN

PA15 TTS Operating Manual Page 2
1 INTRODUCTION ................................................................................4
2 SAFETY INSTRUCTIONS AND DAMAGE EXCLUSIONS................4
2.1 Symbols used for safety instructions............................................................................... 4
2.2 About this manual............................................................................................................ 5
2.3 General safety instructions.............................................................................................. 5
3 INSTALLING THE STECA PA15 TTS REMOTE SWITCH................6
3.1 Precautions........................................................................................................................ 6
3.2 Choosing the installation site........................................................................................... 6
3.2.1 Wall installation PA15.............................................................................................. 7
3.2.2 Mounting the remote switch ..................................................................................... 7
3.2.3 Proximity to consumer equipment............................................................................ 7
3.3 Preparatory measures...................................................................................................... 8
3.3.1 Line preparation........................................................................................................ 8
3.3.2 Preparing the cabling ................................................................................................ 8
3.3.3 Cabling work ............................................................................................................ 8
3.4 Installation and commissioning....................................................................................... 9
3.4.1 Connecting the PA15 to the DC system: .................................................................. 9
3.4.2 Connecting the consumer equipment........................................................................ 9
3.5 Disassembly....................................................................................................................... 9
3.6 Safety measures ................................................................................................................ 9
3.6.1 Fuse in the PA15..................................................................................................... 10
3.6.2 Flammability........................................................................................................... 10
3.6.3 Fuse protection........................................................................................................ 10
3.7 Earthing........................................................................................................................... 11
3.7.1 Positive earthing ..................................................................................................... 11
3.7.2 Negative earthing.................................................................................................... 12
4 THE OPERATING MODES ..............................................................12
4.1 General notes on configuration:.................................................................................... 12
4.2 Release for the data transfer on the SOLARIX TAROM / POWERTAROM ........13
4.3 Decentralised power management (SOC MANAGER P1<P2) .................................. 14
4.3.1 What does this mean? ............................................................................................. 14
4.3.2 How to do this......................................................................................................... 14
4.3.3 Example.................................................................................................................. 17
4.3.4 Special features, using the button / switch.............................................................. 17
4.3.5 Safety function / behaviour on faulty data transfer................................................. 17
4.4 Generator manager (SOC MANAGER P1 > P2) ........................................................ 18
4.4.1 What does this mean? ............................................................................................. 18

PA15 TTS Operating Manual Page 3
4.4.2 How to do this.........................................................................................................19
4.4.3 Special features, using the button / switch..............................................................21
4.4.4 Safety function / behaviour on faulty data transfer.................................................21
4.5 Solar manager.................................................................................................................22
4.5.1 What does this mean? .............................................................................................22
4.5.2 How to do this.........................................................................................................22
4.5.3 Special features, using the button / switch..............................................................24
4.5.4 Safety function when reception fails.......................................................................24
4.6 Excess management (excess)..........................................................................................25
4.6.1 What does this mean? .............................................................................................25
4.6.2 How to do this.........................................................................................................25
4.6.3 Special features, using the button / switch..............................................................26
4.6.4 Safety functions in the event of transmission failure ..............................................26
4.7 Nightlight (NIGHTLIGHT)...........................................................................................27
4.7.1 What does this mean? .............................................................................................27
4.7.2 How to do this.........................................................................................................28
5 HELP WITH TROUBLESHOOTING.................................................28
6 EXAMPLE SYSTEMS.......................................................................32
7 FUNCTIONAL DESCRIPTION .........................................................32
8 TECHNICAL DATA ..........................................................................39
9 MISCELLANEOUS...........................................................................39
Steca GmbH; Version of 04.04; No. 711.576

1 Introduction
Congratulations on your purchase!
The Steca PA15 TTS remote switch for the Solarix TAROM charge
controller is a future-oriented device which can used to realise many
power management functions in a fast and uncomplicated way.
This device can be used for the following functions in your solar-powered
standalone network with system voltages of 12V, 24V and 48V:
¾Realise decentralised, priority-led power management,
¾Integrate into your system additional solar module arrays and
other add-on generators such as wind or water (relay or
contactor required as the switch element),
¾Activate one or more excess consumers automatically (start
signal output),
¾When the battery begins an exhaustive discharge, start an
emergency generator to recharge your battery (start signal
output),
¾Or create an automatic nightlight.
2 Safety instructions and damage exclusions
Steca GmbH and it suppliers cannot accept any liability for any damage or
losses arising as a result of the use of this manual.
Steca GmbH and it suppliers cannot accept any liability for any damage,
losses or third party claims arising as a result of the use of the Steca PA15
TTS remote switch.
Steca GmbH and it suppliers cannot accept any liability for any damage or
losses arising as a result of malfunctions, empty batteries or repair work.
2.1 Symbols used for safety instructions
Safety instructions for personal protection are marked in this manual with
the symbol and are printed in bold.
Notes relating to the functional safety of the system are printed in bold.
Safety instructions from manufacturers of additional components
connected to this remote switch must be observed. This manual must not
be used as a replacement for such instructions. In the event of any
discrepancy between the different manuals, please contact your specialist
dealer.
PA15 TTS Operating Manual Page 4

2.2 About this manual
This manual describes the function and assembly of a remote switch for
power management in a solar-powered standalone network.
For the assembly of any other components, such as solar cells, charge
controllers and consumers, and for the installation of the battery banks,
please see the relevant assembly instructions from the manufacturer.
Tip: Before starting work, read the section: 3 – Please ensure, therefore,
that the connected loads and performance characteristics given in the
“Technical data” section are observed.
!
Before carrying out any assembly work, ensure that all preparatory steps have been taken.
Only begin the assembly work when you are sure that you have
understood the technical information in this manual and only carry out the
work in the sequence specified in the manual!
The manual must also be accessible for third parties for all work being
carried out on the system.
This manual forms part of the Steca PA15 TTS remote switch and must be
included in any onward transfer of ownership.
2.3 General safety instructions
For your safety, it is essential that the following points are observed during
assembly work:
Avoid any sparking in all working procedures!
Solar modules generate a current on light incidence. The full voltage is
present even at low light incidence. For this reason, work carefully and
observe the relevant safety precautions.
During assembly and electrical installation in the DC circuit for the
photovoltaic system, double the values of the system voltages may occur
(in the 12V system up to 24V, in the 24V system up to 48V and in the 48V
system up to 96V).
!
Therefore: Do not touch any bare cable ends!
Please also note that with powerful solar systems, a high-intensity arc may
occur in some circumstances when an electrical connection is
disconnected. This arc could cause fire, skin burns and temporary
blindness. For this reason, ensure that the lines to be connected are dead
when installing the device.
!
Therefore: Before disconnecting electrical connections, ensure that they are
not carrying any current!
Use only well-insulated tools!
Do not use any measuring equipment which you know to be damaged or
functioning incorrectly!
PA15 TTS Operating Manual Page 5

The inherent safety measures in the design of the remote switch can be
impaired or deactivated if the switch is operated in a way not specified by
the manufacturer.
Please ensure, therefore, that the connected loads and performance
characteristics given in the “Technical data” section are observed.
3 Installing the Steca PA15 TTS remote switch
3.1 Precautions
Do not install or operate any PV components in areas where flammable
gas mixtures may occur!
Explosive oxyhydrogen gas may be generated in the vicinity of the battery.
For this reason, ensure good ventilation around the battery and avoid
sparking!
The following legal regulations for batteries must be observed:
⇒DIN VDE 0510 Part 2, Sections:
•7. Precautions against the risk of explosion
•8. Precautions against dangers from electrolytes (sulphuric acid)
•9. Positioning
⇒National Electric Code including Article 690
3.2 Choosing the installation site
The Steca PA15 must be connected to the battery and the consumer
devices. As the line losses and therefore also the voltage drops need to be
kept as low as possible, the PA15 must be installed in such a way that the
cable paths selected are as short and direct as possible. The line lengths
to the consumer equipment can only be affected in a minimal way as on-
site distribution is required.
The PA15 must not be installed in areas where there are flammable liquids
or gases. Installation is only permissible in an area with sufficient
protection classification for the PA15 (see Technical data). The minimum
and maximum permissible ambient temperatures must always be
observed at the installation site. In addition, the PA15 must not be installed
or operated in humid conditions (e.g. bathrooms), or in rooms where
flammable gas mixtures may occur, e.g. from gas cylinders, paint, varnish,
solvents, etc.
The remote switch must be protected against the direct effects of the
weather. Direct sunlight and heating from to neighbouring devices must be
avoided.
Batteries and the PA15 must be installed in a position inaccessible to
children and unauthorised persons. No arrangements should therefore be
made to provide access to the PA15 by unauthorised persons.
PA15 TTS Operating Manual Page 6

The base on which the PA15 is installed must not consist of flammable
material. During operation, the device will heat up due to power dissipation.
For this reason, the installation site should withstand a temperature of
85°C.
3.2.1 Wall installation PA15
The PA15 must be installed on an incombustible base. In addition, there
must be no flammable materials underneath the installation site.
The remote switch can in principle be installed horizontally or vertically.
The PA15 is screwed onto the wall using the bores in the housing. The
remote switch is designed without strain relief so that the conductor cross-
section can be modified in accordance with the site conditions. For this
reason, during installation a strain relief device (e.g. cable clips) should be
fitted approx. 200mm underneath the device before the cable strands are
distributed onto the individual components.
The wiring work can be started once the PA15 has been mechanically
installed.
3.2.2 Mounting the remote switch
The device can be used as a template in order to mark out the mounting
holes
Only use the PA15 as a marking template, and never as a template for
drilling
3.2.3 Proximity to consumer equipment
The PA15 contains a highly sensitive data receiver whose function may be
impaired by radio interference. For this reason, do not install the device in
the immediate proximity of consumer equipment. Maintain a minimum
spacing of 1.5m.
Data reception may be disrupted, especially when used in the immediate
vicinity of consumer equipment containing a DC/DC converter, equipment
containing a radio transmitter or other devices which emit electromagnetic
signals.
The PA15 must not be installed in the immediate vicinity of the following
device types in particular:
-Energy-saving lamps
-Television sets
-DC/DC converters (e.g. MPP tracker, voltage converter for
consumer equipment)
-DC/AC converters (inverters)
-Telecoms systems, mobile telephones, radio equipment
PA15 TTS Operating Manual Page 7

The equipment listed above can be connected to the PA15, of course, but
the spatial distance must be observed in order to prevent interference with
the data reception.
3.3 Preparatory measures
3.3.1 Line preparation
All lines, distributor cans and boxes and fuses should normally be
prepared before connection:
•Cut to length
•Strip on both sides and crimp on the wire end ferrules as necessary
•Prepare the distributor cans
3.3.2 Preparing the cabling
Cables not permanently connected to the housing must be fitted with strain
relief outside the device.
Ensure that the cable cross-section conforms to the maximum load
current. Use cables with a minimum cross-section of 2.5mm2for the
maximum permissible load current of 15A.
3.3.3 Cabling work
Please read the instructions on connecting the PA15 in section 3.4
Installation and commissioning before starting the cabling work.
The PA15 is connected directly to the battery for the solar system.
A short-circuit in the battery must be avoided at all costs. This could result
in the PA15 and the battery being destroyed.
Please therefore ensure that the rechargeable batteries are disconnected
from the system before installing the PA15.
And only reconnect the battery once it has been ensured that the cabling
is functioning correctly.
When assembling onto an existing solar system, please note that solar
modules will generate a current even at low light incidence.
Please ensure that the system is not carrying any voltage from the solar
modules after the system battery has been disconnected.
Even at low light incidence, the full voltage will be present, which may
result in damage to the system. Fit the solar modules with an opaque
cover securely fixed using adhesive tape. The modules can be rendered
free of voltage via this cover.
•The solar modules must never be disconnected by a short-circuit. Sparking!
•Use only well-insulated tools!
•Do not touch any bare cable ends!
•Immediately insulate any bare cable end which is not connected straight away!
PA15 TTS Operating Manual Page 8

PA15 TTS Operating Manual Page 9
•Only perform work with a dry base! Components (solar modules, cables, etc.) must not be
wet or damp during installation!
•Ensure that the correct polarity is used during cabling work!
Notes:
In standalone systems, earthing of the components is not necessary, not
standard or may be prohibited by local regulations (e.g. DIN 57100 Part
410 Prohibition of Earthing for Safety Extra-Low Voltage Electrical
Circuits).
3.4 Installation and commissioning
It is essential that all general safety instructions (section 2.3; page 5) are
observed.
It is also critical that the connection sequence given in the sections below
is followed. This is the only way to ensure that the commissioning process
is completed correctly.
3.4.1 Connecting the PA15 to the DC system:
•Disconnect the entire system from the supply
•For additional protection for the PA15, fit a 15A fuse on the supply line to the battery
•Remove the fuse on the PA15
•Ensure that the polarity is correct on connection
•Connect the plus pole on the power lead to terminal A+.
•Connect the minus pole on the power lead to terminal A-.
⇒Insert the fuse into the PA15.
When the device has been correctly connected to the supply lead, a short beep will be emitted
to indicate that the device is being supplied with power.
3.4.2 Connecting the consumer equipment
•Each consumer circuit should be protected by an additional fuse.
•Before connecting the consumer line, switch off all the consumer equipment to prevent
sparking.
•Connect the consumer line to the screw terminals on the remote switch. Ensure that the
polarity is correct!
•Connect the plus pole on the consumer line to terminal L+.
•Connect the minus pole on the consumer line to terminal L-.
Lastly, secure all cables with strain relief devices in the immediate vicinity
of the PA15. Strain relief devices should also be fitted to the remaining
components.
3.5 Disassembly
Disassembly is carried out in the reverse order to the installation process
described above. First shut down all consumer devices manually and then
disconnect from the remote switch. The fuse in the PA15 can now be
removed.
3.6 Safety measures
All safety measures used to protect the PA15 still may not prevent
problems caused by incorrect installation external to the remote switch.

We therefore strongly recommend installing a fuse directly at the battery
pole to prevent short-circuits.
3.6.1 Fuse in the PA15
The fuse is used solely to protect the PA15 against incorrect polarity and
excess current. The fuse must be replaced following a polarity reversal.
Only spare fuses of the same type may be used. This greatly increases
the safety of the system which also means that no dangerous operating
conditions occur even if the electronics fail.
3.6.2 Flammability
The PA15 comprises only non-flammable or self-extinguishing materials.
Even in unforeseeable error situations, no fires can be triggered if there
are no flammable materials in the immediate vicinity of the controller and
the remote switch has been installed on an incombustible base.
3.6.3 Fuse protection
A fuse protects the PA15 against single faults (e.g. load short-circuit,
battery reverse polarity, reverse polarity of the consumer equipment, etc.).
+
-
+
-
Ba tte ry wire
Button or switc h
Max. Load
15 A
15 A
A+ A- S S L+ L-
So l a r
Manager Excess SOC Manager Nightlight Buzzer
PA 15
However, some double faults can result in the destruction of the remote
switch and the components connected to it (consumer equipment).
The PA15 TTS remote switch can be destroyed if, for example:
•The battery has been connected with the reverse polarity on the load
output,
•Regardless of the polarity, a battery connection lead is connected to the
battery input (A+ or A-) and the other battery lead is connected to the
load output (L+ or L-),
•The battery connection has been connected to the switch inputs S,
PA15 TTS Operating Manual Page 10

•The battery connections are touching the jumper board (contacts for the
selecting the battery type),
•An incorrect source (e.g. network at 230V) has been connected to any
connection.
3.7 Earthing
The sections below describe only the technical options for earthing. The
aim is to maintain the switching functions. The local regulations where the
device is being used must be observed and followed by the installation
engineer. The losses in safety extra-low voltage status caused by earthing
must be compensated by the corresponding insulation measures on active
parts (protection against direct contact).
3.7.1 Positive earthing
If earthing on the positive side is selected, this can also be used as the
common earthing for all system components. All plus lines will still be
interconnected inside the device.
-
-
Butto n or switc h
Lo a d (Relay)
+
-
-
So la r m o d ule Tarom controller
15 A
A+ A- S S L+ L-
So la r
Manager Excess SOC Manager Nightlight Buzzer
PA 15
Ba tte ry wire s
Lo a d
+
PA15 TTS Operating Manual Page 11

3.7.2 Negative earthing
-
-
Lo a d
(
Re la
y)
+
-
-
So la r m o d ule Tarom controller
15 A
A+ A- S S L+ L-
So la r
Manager Excess SOC Mana ger Nightlight Buzzer
PA 15
Lo a d
+
Ba tte r
y
wires Button orswitch
Only one connection may be earthed on each of the minus connections on
the battery input and load output components.
The earthing conditions on the existing solar system must be noted.
If there is already a minus-side earthing in your solar system, only one
component (in this example the battery minus) may be connected to this
earth. Connecting other minus connections (e.g. L-) will bridge the
switching elements inside the device and will prevent the entire device
from functioning.
4 The operating modes
The remote switch has various operating modes. It can be custom-
configured depending on the function required. The sections below
describe how to do this.
4.1 General notes on configuration:
In order to configure the device for the required operating mode,
adjusting controllers P1 and P2 need to be set and one or more
jumpers need to be set correctly.
The PA15 detects most configuration errors and indicates these with
an uninterrupted beep. The device indicates an error of this type if
both the adjusting controllers are set to the same value or the
jumpers are set incorrectly.
A button (momentary contact) or switch (permanent contact) can be
connected to the PA15 between the two terminals marked with an S.
PA15 TTS Operating Manual Page 12

PA15 TTS Operating Manual Page 13
When the load output on the remote switch is triggered, the
consumer equipment connected can be switched on and off using
the button, just as with a remote-control switch. When the load output
on the PA15 is blocked, the load output is only triggered for as long
as the button is depressed. If an option for manual override is
required for the PA15, a switch (permanent contact) can be
connected to these terminals.
4.2 Release for the data transfer on the SOLARIX TAROM /
POWERTAROM
The Steca PA15 TTS remote switch can only be operated in
combination with SOLARIX TAROM 235, TAROM 245, TAROM 430
or POWERTAROM solar charge controllers, software version 12.15
and higher.
On delivery, the data transfer function is deactivated on TAROM /
POWERTAROM solar charge controllers. To be able to use the
PA15, the transfer function first needs to be enabled.
The PA15 does not need to be installed for this purpose.
Proceed as follows:
•Commission the TAROM / POWERTAROM charge controller
in accordance with the instructions in the relevant installation
manual.
•Press any key to access the first menu level.
•Then press the two outermost buttons on the TAROM/
POWERTAROM simultaneously; this will take you to the
“OPTION TRANSMIT” menu.
•Press the OK button in the “OPTION TRANSMIT” menu to
view the current setting.
•Use the UP / DOWN buttons to select the “AKKU” (BATTERY)
mode and confirm by pressing the OK button.
•The setting will now be saved, even when the Tarom /
Powertarom is not operational.
•This function can only be enabled by selecting “AKKU”
(BATTERY); no data will be sent to the receiver in the “PC”
and “OFF” positions.
•The “PC” option is used for servicing purposes by the
manufacturer only and cannot be used.
Once the data transfer function has been enabled using the “AKKU”
option, the Tarom / Powertarom start transferring one data packet to the
battery lead about once a minute.

PA15 TTS Operating Manual Page 14
The Tarom / Powertarom transfers the following system information:
•Current SOC VALUE,
•Identifier for the generator manager
•Identifier for the excess manager (EXCESS)
•DAY / Night information
In accordance with this setting, the PA15 TTS remote switch will only react
to the signals sent if it receives the information transferred at least 3 times
without error.
This transfer protection features, realised using multiple reception, may
result in delays in the switch response. The shortest delay time is around 4
minutes.
If the information itself changes within the required triple information
transfer (e.g. the SOC changes from 60% to 59%), a third transfer of the
new value will be required.
If the PA15 is unable to receive any correct signals, permanently specified
safety functions become active in order to protect the system (e.g. load
shut-off).
During data transfer, the power consumption of the TAROM /
POWERTAROM charge controller increases for a short time. For this
reason, this mode should be deactivated if not being used.
4.3 Decentralised power management (SOC MANAGER P1<P2)
4.3.1 What does this mean?
Decentralised power management can be used to assign different
priorities to the consumer equipment in your standalone network,
and enable or block them automatically regardless of the SOC. One
or more external buttons can be connected to the device to be able
to switch your consumer device on and off more easily.
You can also choose whether or not you want an acoustic early
warning before the consumer device connected is shut down.
The SOC information is transferred to the battery lead by the
Solarix Tarom charge controller via up-modulated signals, see
section 4.2.
4.3.2 How to do this
1. Connect the PA15 to your battery lead with the correct polarity
(A+ / A-).
2. Connect the consumer device to the output on the PA15 (L+ 7/
L-) with the correct polarity.

-
-
Lo a d
(
Re la
y)
+
-
-
So la r m o d ule Tarom controller
15 A
A+ A- S S L+ L-
So la r
Manager Excess SOC Mana ger Nightlight Buzzer
PA 15
Lo a d
+
Ba tte r
y
wires Button orswitch
3. To configure the remote switch for this operating mode, plug the
jumper on the PA15 into the “SOC MANAGER” position. If you
want a warning tone to be issued when the shut-down threshold
is reached, also plug in the “BUZZER” bridge.
The buzzer will then output a warning signal 10 times before the
load is shut off, over a total period of around 1 minute.
Nightlight Buzze
r
SOC
Manager
Solar
Manager Exc ess
4. Then set the shut-down threshold on “P1”. The shut-down
threshold is the SOC value at which the remote switch shuts off
the connected load. Position “2” would mean, for example, that
the load is shut off when the SOC <= 29%.
P1
P2
Reactivation
threshold
Shutdown
threshold
15 A
A+ A- S S L+ L-
So la r
Manager Excess SO C Manager Nightlight Buzzer
PA 15
P1
P2
PA15 TTS Operating Manual Page 15

The beeps sounded when resetting the adjusting controller are normal and
are intended to help you set the required values more easily.
The beep signals the transition between two setting options, e.g. starting
from the far left 0, turn 4 beeps to the right = 4. SOC values between
<10% and >99 % can be set on the scale from 0 – 9.
0 : SOC between 0 ... 9% (<10 %)
beep
1 : SOC between 10 ... 19% (<20 %)
beep
....
beep
8 : SOC between 80 ... 89% (<90 %)
beep
9 : SOC between 90 ... 99% (<100 %)
5. The activation threshold (hysteresis) is the SOC value at which the
consumer device is to be reactivated. This value can be set on “P2”.
Position “3” would mean, for example, that the load is switched back on
when the SOC <= 30%.
The beep signals the transition between two setting options, e.g. starting
from the far left 0, turn 4 beeps to the right = 4. SOC values between
<10% and >99 % can be set on the scale from 0 – 9.
0 : SOC between 0 ... 9% (>=10 %)
beep
1 : SOC between 10 ... 19% (>=20 %)
beep
....
beep
8 : SOC between 80 ... 89% (>=80 %)
beep
9 : SOC between 90 ... 99% (>=90 %)
6. Please note that for this operating mode to function correctly, the
value at “P1” must always be less than the value at “P2”!
SOC manager function only when: P1 < P2
If this condition is not fulfilled, the Generator Manager function is
automatically active, which has the opposite function, see section 4.4
The load output is always enabled if either the SOC value is greater than
the shutdown value, or, following shutdown, the SOC is once again
greater than the activation value (P2).
When making the electrical connections, please always observe
section 3. In standalone systems, earthing of the components is not
necessary, not standard or may be prohibited by local regulations (e.g.
PA15 TTS Operating Manual Page 16

PA15 TTS Operating Manual Page 17
DIN 57100 Part 410 Prohibition of Earthing for Safety Extra-Low Voltage
Electrical Circuits).
4.3.3 Example
Let’s say you want to connect a television set to the standalone
network via this decentralised exhaustive discharge protection. It
should only be possible to operate the device if the load status for
the solar battery is at least 50%. Therefore, set the range “<50%”
(=4) on P1. So that the television set is not switched on and off
continually when the SOC fluctuates slightly, a value at least 10%
higher than the shutdown threshold should be set for the
reactivation threshold (P2). In other words, set “P2” to >=70% (=7)
for example. So that the remote switch “knows” that it should act as
an exhaustive discharge protection device, also set the jumper to
the “SOC MANAGER” position, and if you want an acoustic early
warning to be emitted, set the second jumper to the “BUZZER”
position.
4.3.4 Special features, using the button / switch
If required, an external button can be connected between the two
terminals marked with an S. Assuming the shutdown threshold on
P1 has not yet been reached, this button can be used to switch the
load break switch on the PA15 on and off manually just like a
remote-control switch. Multiple buttons can also be connected in
parallel in order to install multiple light switches in a room, for
example. This button can also be installed at a later stage once the
device is already in operation.
4.3.5 Safety function / behaviour on faulty data transfer
When the device is commissioned, the consumer output will always
be enabled if the SOC is above the shutdown value (P1). In this
case, it doesn’t matter if the SOC is also higher than the hysteresis
value (P2).
If the shutdown value (P1) has not been reached, however, the
hysteresis value (P2) must be exceeded once again in order for the
load to be switched on.
If the PA15 has shut off the load due to its controller position and
the data transferred, the load CANNOT be reactivated by reducing
the shutdown thresholds. The activation value needs to be reached
first. Reactivation can only be achieved by reducing the activation
value accordingly. In this case, ensure that the shutdown value P1
is always smaller than the activation value P2; if necessary, reduce
the shutdown value in parallel with the activation value P2.

If the data transfer is interrupted or not activated in the Tarom, the
output remains or becomes enabled, thus ensuring the operational
safety of the consumer device.
If the data transfer is interrupted, the button / switch can be used to
switch the consumer on or off manually.
The buzzer does not indicate an interruption in the data transfer.
In the shutdown early warning phase, all the changes in the settings
are ignored, i.e. the acoustic return message is also deactivated
when the controller is adjusted. If the jumper for the buzzer is
removed during the warning phase, it will NOT be deactivated
either!
The warning for invalid settings remains active at all times.
4.4 Generator manager (SOC MANAGER P1 > P2)
PA15 TTS Operating Manual Page 18
-
-
Sw it c h
Re la y
-
-
So la r m o d u le Tarom controller
15 A
A+ A- S S L+ L-
So la r
Manager Excess S MaOC nager Nightlight Buzzer
PA 15
Ba tte ry wire s
La st
+
Shunt HS200
RJ 48
+
-
Sta rt
signal
Out
Out
(Diesel
wind
water
etc...)
G
4.4.1 What does this mean?
In this operating mode, the PA15 can supply a start signal for an
emergency generating set, depending on the load status of the
battery. If the SOC falls below a certain value, the generator will be
started via the load output on the PA15 TTS remote switch to
recharge the battery.
With this function, the PA15 provides a continuous switching signal
to its output for as long as the condition set is fulfilled. The
amplitude of this signal corresponds to the system voltage and
relates to the battery plus potential.
Before using this operating mode, it is essential to ensure that the
switching signal supplied by the PA15 is suitable for the generator
to be started!
Depending on the requirements, it may be necessary to modify the
switch signal via additional components, e.g. relays.
These components do not form part of the Steca PA15 TTS remote
switch and must be purchased and installed as an extra.

As the control is carried out according to the state of charge SOC,
the actual battery voltage may in fact exceed the permissible final
charge voltage before the shutdown value is reached; it must be
ensured that the final charge voltage on the generator being
controlled cannot reach any high, non-permissible values.
For control by the PA15, only generators which have an inherent
limit to the final charge voltage are suitable.
4.4.2 How to do this
This operating mode functions in almost exactly the same way as
the decentralised exhaustive discharge protection described in
section 4.3. The difference is that the adjusting controller is set to
precisely the opposite function.
1. Connect the PA15 to your battery leads with the correct polarity (A+
/ A-).
2. Connect the load output (L+ / L-) to the start input for the generator,
if this is possible directly. Otherwise, a suitable signal converter is
required (e.g. relay).
3. To configure the remote switch for this operating mode, plug the
jumper into “SOC MANAGER”.
Nightlight Buzze
r
SOC
Manager
Solar
Manager Exc e ss
4. The position of the “Buzzer” jumper is not relevant in this operating
mode. No acoustic early warnings are issued when the PA15 is
switched on or off.
PA15 TTS Operating Manual Page 19
15 A
A
+ A- S S L+ L-
So la r
Manager Excess SOC Manager Nightlight Buzzer
PA 15
P1
P2
5. Now set the shut-down threshold on “P1”. The shut-down threshold
is the SOC value at which the PA15 output is to shut off the
generator connected. To do this, the PA15 disconnects the
connection to the battery at its output.
If the current SOC value transferred is higher than the threshold set
using P1, the PA15 output is disabled.
P1
P2
Reactivation
threshold
Shutdown
threshold

The beep signals the transition between two setting options, e.g.
starting from the far left 0, turn 4 beeps to the right = 4. SOC values
between <10% and >90 % can be set on the scale from 0 – 9.
0 : SOC between 0 ... 9% (>= 10% --> OFF; <10% --> ON)
beep
1 : SOC between 10 ... 19% (>= 20% --> OFF; <20% --> ON)
beep
....
beep
8 : SOC between 80 ... 89% (>= 80% --> OFF; <80% --> ON)
beep
9 : SOC between 90 ... 99% (>= 90% --> OFF; <90% --> ON)
The adjusting controller P2 must be set to a smaller value than P1
for this operating mode.
6. Now set the activation threshold on “P2”. The activation threshold is
the SOC value at which the PA15 output is to start the generator.
At e.g. the value “4”, the generator will be started, if the SOC is below
40%.
If this value is reached, the PA15 will connect its load output to the
battery until the shut-down threshold (of P1) is reached.
The beep signals the transition between two setting options, e.g.
starting from the far left 0, turn 4 beeps to the right = 4. SOC values
between <10% and >90 % can be set on the scale from 0 – 9.
0 : SOC between 0 .. 9% (<10%)
beep
1 : SOC between 10 .. 19% (<20%)
beep
. . .
beep
8 : SOC between 80 .. 89% (<90%)
beep
9 : SOC between 90 .. 99% (<100%)
7. Please note that for this operating mode to function correctly, the
value at “P1” must always be greater than the value at “P2”!
Generator manager function only when :
P1 > P2
If this condition is not fulfilled, the SOC MANAGER function is
automatically active, which has the opposite function, see section
4.4
PA15 TTS Operating Manual Page 20