VR Avionics Walter M601 User manual

TSLM
for
Walter M601
Engines
OPERATIONAL &
INSTALL MANUAL
Updated: 29 June 2016
Copyright 2016 by VR Avionics

TSLM - M601 Operational & Install Manual
© 2016 VR Avionics Inc.
All ri hts reserved.
This User and Installation Guide and the information contained herein is the proprietary data of VR
Avionics. No part of this manual may be reproduced, copied, transmitted, disseminated or stored in
any stora e medium, for any purpose without the express written permission of VR Avionics, Inc.
VR Avionics hereby rants permission to download a sin le copy of this manual and of any
revision to this manual onto a hard drive or other electronic stora e medium to be viewed for
personal use, provided that such electronic or printed copy of this manual or revision must contain
the complete text of this copyri ht notice and provided further that any unauthorized commercial
distribution of this manual or any revision hereto is strictly prohibited. Information in this document
is subject to chan e without notice. VR Avionics reserves the ri ht to chan e or improve its
products and to make chan es in the content without obli ation to notify any person or
or anization of such chan es. Visit the VR Avionics website (www.vravionics.com) for current
updates and supplemental information concernin the use and operation of this and other VR
Avionics products.
VR Avionics
www.vravionics.com
06/29/16 © 2016 VR Avionics pa e 2 of 33

TSLM - M601 Operational & Install Manual
Contents
Introduction.......................................................................................................................................5
System Options...............................................................................................................................5
Retrofit to existin systems.............................................................................................................5
TSLM versions................................................................................................................................5
Operation...........................................................................................................................................6
Introduction.....................................................................................................................................6
Power-up (Master ON)....................................................................................................................6
Initiatin a Start...............................................................................................................................6
Initiatin a Run ...............................................................................................................................7
Automatic Protection Limitin .........................................................................................................8
Start Limitin ...............................................................................................................................8
Beta & Reverse Propeller Limitin ..............................................................................................8
Anti-Flameout Operation (AFO)......................................................................................................8
Determinin En ine State...............................................................................................................8
Parameter Exceeds........................................................................................................................9
Required Actions........................................................................................................................9
TSLM Li ht Codes..........................................................................................................................9
Operational Check Lists and Codes.............................................................................................10
Electrical & Mechanical Specifications.........................................................................................11
Dimensions (SN 7001 and later)...................................................................................................11
Dimensions (SN 5001 – 6200)......................................................................................................12
RS232 Data Interface (SN 5001 – 6200)......................................................................................12
Installation.......................................................................................................................................13
Tools and Equipment....................................................................................................................13
Electrical Installation.....................................................................................................................14
Power and Ground........................................................................................................................15
I nition Circuit...............................................................................................................................16
Start/Run Selection.......................................................................................................................17
Start Contactor..............................................................................................................................17
Start Interrupter Valve...................................................................................................................18
Limitin (EHT) Circuit....................................................................................................................19
TSLM Status Li ht........................................................................................................................20
Exceed Li ht.................................................................................................................................20
Volta e Sensin ............................................................................................................................21
Gas Generator Speed Sensin (N1).............................................................................................21
Propeller Speed Sensin (N2)......................................................................................................21
Inter Turbine Temperature Sensin (ITT).....................................................................................22
Beta Switch Sensin .....................................................................................................................22
Torque and Oil Pressure Sensin (optional)................................................................................23
Oil Temperature Sensin (optional)..............................................................................................24
TSLM Pin Definitions....................................................................................................................25
Configuration..................................................................................................................................26
Introduction...................................................................................................................................26
Confi uration Settin s..................................................................................................................26
History Recorded (bytes)..........................................................................................................26
Start Cycles..............................................................................................................................26
Fli ht Hours..............................................................................................................................26
Upper ITT Exceeds...................................................................................................................26
Lower ITT Exceeds...................................................................................................................26
N1 Exceeds .............................................................................................................................26
N2 Exceeds .............................................................................................................................26
Torque Exceeds .......................................................................................................................27
Max. Unit Temperature ºC .......................................................................................................27
Min. Unit Temperature ºC ........................................................................................................27
Last Attempted Start Time (seconds) ......................................................................................27
06/29/16 © 2016 VR Avionics pa e 3 of 33

TSLM - M601 Operational & Install Manual
Last Attempted Start Min Volta e (V) ......................................................................................27
Last Attempted Start Max ITT (ºC) ..........................................................................................27
Last Attempted Start EHT Resistance (Ohms) ........................................................................27
ITT Calibration .........................................................................................................................27
Volta e Calibration ..................................................................................................................27
Torque Span Calibration ..........................................................................................................27
Torque Offset Calibration ........................................................................................................27
Oil Pressure Span Calibration .................................................................................................27
Oil Pressure Offset Calibration ................................................................................................27
Oil Temperature Span Calibration ...........................................................................................27
Oil Temperature Offset Calibration ..........................................................................................28
Alternative Interrupter Activation .............................................................................................28
Enable Oil-Temperature Measurement....................................................................................28
Torque sensor is 200 psi type..................................................................................................28
Force a Start sequence when double-clickin Start Button .....................................................28
Walter En ine Type (0=M601D, 1=M601E-11, 2=M601E-11A) ..............................................28
Start ITT Control Settin ..........................................................................................................28
History Lo s Operations...............................................................................................................28
History retrieval.........................................................................................................................28
History clearance......................................................................................................................28
Viewin the history....................................................................................................................28
Dia nostic Tests...........................................................................................................................29
I nition check............................................................................................................................29
Interrupter check...........................................................................................................................29
EHT valve check...........................................................................................................................29
Exceed li ht check....................................................................................................................29
SetView Software ...........................................................................................................................30
Introduction...................................................................................................................................30
System Requirements..................................................................................................................30
SetView download and Installation...............................................................................................30
Usin SetView...............................................................................................................................30
Viewin and recordin parameters...........................................................................................31
Synchronizin with the system.................................................................................................31
Sharin files via email...............................................................................................................31
Adjustin the confi uration.......................................................................................................32
Openin and viewin history files.............................................................................................33
Dia nostic test and troubleshootin .........................................................................................33
06/29/16 © 2016 VR Avionics pa e 4 of 33

TSLM - M601 Operational & Install Manual
Introduction
System Options
This manual describes the installation and operation of the Turbine Start Limit & Monitor (TSLM)
from VR Avionics when used with a Walter/GE M601 en ine. The TSLM is a unit (black box) which
can function standalone or with other units (black boxes) from VR Avionics as shown below. This
manual is dedicated to the TSLM, so when plannin to install further units the user must also
include the manuals of these other units. For example, should you plan to use one or more VRX
multi-function displays, you need to read the VRX M601 Operational & Installation manual.
Retrofit to existing systems
The TSLM unit can be easily retrofitted to an already
existin aircraft system. Since it is remote mount, it will have
little to no impact on your current instrument panel if start
control and limitin is all you require. You can however
choose to add a VRX multi-function display (shown here) for
the added monitorin it provides, in which case you need to
make a little space for this on your panel.
TSLM versions
A few versions of the TSLM have been produced over the years. Later versions have remained
backward compatible with earlier ones by retainin the connector and pin-outs for the most part.
The followin table lists the differences other than normal eneral performance improvements of
the various versions as referenced by their serial numbers:
Serial number range Differences
3001 - 4100 First Generation
5001 - 6200 Oil-temperature measurement added
7001 and later New more compact enclosure
No serial port connector
Units with serial numbers 5001 and up are handled in this manual.
06/29/16 © 2016 VR Avionics pa e 5 of 33

TSLM - M601 Operational & Install Manual
Operation
Introduction
The followin sections describe the workin of the TSLM (firmware version 3.1 or later) in detail.
Near the end of this chapter we provide the various checklists and error codes on one pa e for
your convenience.
Power-up (Master ON
When first the TSLM is powered it turns on the TSLM li ht for about 2 seconds while it does a self-
check. If everythin checks out the TSLM li ht is turned off. If a problem or concern is detected the
TSLM li ht indicates as follows:
Problem or Concern TSLM light indication
EHT Error:
The EHT valve is bein powered externally from the
TSLM due to possible wirin problem
4 blinks.. pause.. 4 blinks.. pause, etc
Memory Warning:
The TSLM memory used for recordin start and
exceed raphs has reached the 90% mark. You may
want to retrieve this history and clear the TSLM's
memory.
7 blinks (directly after power-up)
TSLM Internal Fault:
The TSLM has failed the self-check and needs to be
serviced.
Solidly on or slowly flashin (no code)
Initiating a Start
By depressin the START button you initiate a start sequence. The TSLM performs pre-start
checks first unless commanded to bypass them (see later). It checks that the ITT is connected
properly and reads below 200ºC, that the bus volta e is at least 20 volt and that the EHT is
detected electrically. These checks have been included for safer startin and if one fails the TSLM
will decline the start and report the cause via the TSLM li ht as follows:
Cause of Error TSLM light indication
ITT Error:
ITT is above 200ºC or not connected properly. If
above 200ºC you may want to do a RUN to cool it
down before attemptin another start.
2 blinks.. pause.. 2 blinks.. pause, etc.
Voltage Error:
The bus volta e is too low for safe startin .
3 blinks.. pause.. 3 blinks.. pause, etc.
EHT Error:
Access by the TSLM to the EHT valve could not be
confirmed electrically. The reason could be that the
limiter enable/disable switch is not in the correct
position.
4 blinks.. pause.. 4 blinks.. pause, etc
The pre-start checks can be bypassed by double-clickin the START button. The “double-click
start override” settin must be enabled in the TSLM confi uration for this to work.
06/29/16 © 2016 VR Avionics pa e 6 of 33

TSLM - M601 Operational & Install Manual
If one of the pre-start checks failed, you should correct the cause before tryin a ain. To
acknowled e or reset the error code on the TSLM li ht you can press the START or RUN button
for 1 second. The TSLM li ht shall stop flashin and you are ready to issue another start.
If all the pre-start checks pass, the TSLM will activate the start sequence by en a in the starter,
turnin on the i nition and sequencin the fuel to the torch i niters. You should be able to hear the
starter/ enerator wind up and the i niters producin sparks. From the moment the starter en a es
there are 10 seconds reserved for li ht-off. Li ht-off is where the main fuel in the combustion
chamber i nites and can clearly be heard and seen in the ITT risin sharply. In case li ht-off does
not occur within the 10 seconds (which implies some problem), the TSLM will turn off the i nition
and stop the fuel to the torch i niters, but continue spinnin the en ine for 10 more seconds.
If this happens the pilot must close the fuel (shut-off valve lever to closed) just after the first 10
second period have expired. With the en ine spinnin for the next 10 seconds or so, closin the
fuel will pur e fuel vapors from the combustion chamber.
If the en ine li hts off before the first 10 second period expired (as would normally happen), the
TSLM will sense this and immediately start controllin the rise in ITT and the absolute ITT value as
needed by activatin the EHT valve. Both the TSLM li ht and the EHT li ht (if fitted) will turn on
when the EHT is activated by the TSLM durin the start.
If the ITT leads (from the thermocouples) is connected the wron way around (maybe after a
service) or become disconnected in some way that would only become apparent after li ht-off, the
TSLM will sense this and immediately turn on the EXCEED li ht. Since the TSLM can no lon er
measure the ITT accurately in this condition, the pilot needs to abort the start by cuttin fuel as
earlier mentioned to avoid possibly dama in the turbine. The starter will remain active for another
10 seconds so that fuel can a ain be pur ed from the combustion chamber.
The EXCEED li ht will also be turned on when the ITT increases to over 700ºC. The TSLM should
be able to control the ITT to below this temperature. If it is unable to, this would imply some major
problem – for example unintended isolatin valve activation, dead batteries, or fuel control unit
problems. An abort of the start is recommended in this case.
When the compressor reaches idle speed (above 50%), the starter, i nition and fuel to the torch
i niters will be turned off. Otherwise these devices will timeout 20 seconds after li ht-off was
detected.
See also Determinin En ine State.
Initiating a Run
A run operation pur es possible fuel vapors inside the combustion chamber. If your ITT is above
200ºC performin a run will cool down the turbine temperature by forcin new air throu h the
en ine.
By depressin the RUN button you initiate a RUN / MOTOR sequence. The TSLM will turn on the
starter for 8 seconds to spin the en ine. After the 8 seconds, the starter is turned off. The TSLM
will monitor the N1 si nal and alert you after the run if no si nal was detected from the N1 tach-
enerator sensor by pulsin the TSLM li ht as follows:
Caution TSLM light indication
N1 Error:
While conductin the run the TSLM did not detect any
si nal from the N1 sensors. A si nal should have
been detected. Check wirin .
5 blinks.. pause.. 5 blinks.. pause, etc
If you et the above warnin , check your wirin to rectify this. See also Determinin En ine State.
06/29/16 © 2016 VR Avionics pa e 7 of 33

TSLM - M601 Operational & Install Manual
Automatic Protection Limiting
The TSLM provides automatic en ine limitin when it restricts fuel to the en ine by activatin the
EHT valve. The EHT li ht (if installed) will come ON whenever limitin is performed. Limitin is
restricted to only the start and beta-propeller speed limitin . Limitin may also be disabled, by an
external limiter enable / disable switch (see pa e 19 for its electrical circuit).
Start Limiting
Durin the start process the en ine’s temperature (ITT) can be exceeded – more so when it is
started without any form of limitin (no activation of the EHT). The amount of limitin required vary
accordin to conditions such as outside air temperature, altitude, battery char e and initial ITT. The
TSLM utilizes an al orithm to control both the rate of rise and the absolute value of the inter-turbine
temperature (ITT).
If you have for otten the limiter enable / disable switch (if installed) in the disable position when
initiatin a start attempt, the TSLM's pre-start checks will detect it, decline the start attempt and
inform you via the TSLM li ht as to the problem. See the section on initiatin a start for more.
Beta & Reverse Propeller Limiting
To prevent a propeller exceed in Beta mode as well as to ensure effective reverse thrust
application, the TSLM will limit the propeller speed (N2) while in BETA mode. The TSLM knows the
propeller is in beta mode by sensin the BETA micro-switch.
Anti-Flameout Operation (AFO
In anti-flameout operation the i niters and i nition fuel valves are continuously activated as a
precautionary measure a ainst en ine flameout. This mode is manually activated by the pilot when
the en ine has already been started (is runnin ) by depressin the START switch for at least one
second before releasin it. The TSLM status li ht will li ht up to indicate that the AFO mode has
been entered. To deactivate this mode in-fli ht, the pilot depresses the RUN switch for at least one
second before releasin it. The TSLM status li ht should o out indicatin the anti-flameout mode
has been exited. See also Determinin En ine State.
Determining Engine State
The TSLM mainly uses the N1 (NG) parameter to determine whether the en ine is running or not
running (above 50% N1 means running and below means not running). This en ine state is
important since it impacts the start-run switch functionality. If not-runnin the start-run switch(es)
initiate start and run sequences, while if the en ine is runnin the switch(es) activate and
deactivate anti-flameout operation (AFO). This is why proper N1 wirin and si nalin to the TSLM
is emphasized and why we have a dedicated TSLM li ht code for N1 error. The TSLM has an
alternative to determine en ine state if for example N1 become disconnected or the tach- enerator
ceases to provide an alternatin si nal. In this alternative (where N1 will read zero) both the ITT
and N2 parameters need to be above 400 (400 °C ITT and 400 rpm N2) for the en ine state to be
considered as running.
06/29/16 © 2016 VR Avionics pa e 8 of 33

TSLM - M601 Operational & Install Manual
Parameter Exceeds
Should any of the en ine parameters o over their maximum limits the EXCEED li ht (if installed)
will come ON for the duration of the exceed. Durin this time all relevant parameters ets recorded
versus time and a dedicated counter increments within the TSLM. This information can be viewed
in the Confi uration and History sections of the SetView software.
Parameter exceeds (maximum values) are accordin to the type of M601 en ine used:
Engine Type Max. ITT Max. N1 Max. N2 Max. Torque
M601D 735 °C 100.00% 2080 RPM 132 psi
M601E-11 735 °C 100.00% 2080 RPM 145 psi (106%)
M601E-11A 710 °C 98.50% 1950 RPM 134 psi (98%)
Make sure that you set the “En ine Type” confi uration property to the appropriate model en ine
you are usin (see pa e 28).
Required Actions
Should the EXCEED li ht have come on durin fli ht, you can retrieve and analyze the time- raph
recorded within the TSLM to decide on what action to take next. Required actions vary from no
action to returnin the en ine to an overhaul facility for inspection/repair. With the raph you will
not only identify the parameter exceeded, but obtain both the maximum it reached as well as the
time it spent above the maximum limit. With this you will be able to look-up the required action you
need to take usin the en ine's manual, or askin a qualified person.
TSLM Light Codes
The TSLM li ht provides feedback to the pilot concernin the system. The li ht will blink a certain
pattern to report any problem to the pilot. The followin table shows the codes:
Problem TSLM light indication
ITT Error 2 blinks.. pause.. 2 blinks.. pause, etc
Volta e Error 3 blinks.. pause.. 3 blinks.. pause, etc
EHT Error 4 blinks.. pause.. 4 blinks.. pause, etc
N1 Error 5 blinks.. pause.. 5 blinks.. pause, etc
ISOL Error 6 blinks.. pause.. 6 blinks.. pause, etc
Memory Warnin 7 blinks.. pause.. 7 blinks.. pause, etc
TSLM Internal Error Solid ON, or slowly flashin
See also the sections that describes initiatin a start and a run.
Acknowledging the TSLM light Indication:
An error code can be acknowled ed and reset by holdin either the start or run button / switch
down for at least 1 second. The TSLM li ht will then stop blinkin , which will indicate that the TSLM
is now ready to accept new commands from the pilot (start, run, etc.).
06/29/16 © 2016 VR Avionics pa e 9 of 33

TSLM - M601 Operational & Install Manual
Operational Check Lists and Codes
START:
1. Power ON
2. Inverter on if necessary
3. Fuel ON
4. Fuel pump(s) ON
5. Condition lever forward to OPEN (detent)
6. Propeller in feather position
7. Throttle in IDLE position
8. Ensure ISOL valve is OFF (normal position)
9. Ensure Limiter Enable switch (if installed) is ON
(normal position)
10. Press START. Keep hand ready on the
condition lever in case of problem
11. If en ine fails to li ht after 10 seconds - shut fuel
down by pullin the condition lever, and wait for
starter motor to disen a e before turnin power
off to investi ate problem.
12. If en ine li hts - monitor increasin ITT
temperature. If the EXCEED li ht comes ON or
the ITT exceeds 700°C, quickly pull the
condition lever (fuel shut-off lever) to CLOSED.
13. Ensure N1 ( as enerator speed) increases to
at least 60%. If not, forward the throttle sli htly
and monitor ITT.
14. After N1 and ITT have stabilized, switch the
enerator ON.
15. Check Oil and Fuel Pressure
16. Forward Prop to full fine pitch
RUN:
1. Master switch On
2. Throttle to idle
3. Propeller to Feather
4. Condition lever in shut off
(CLOSED) position
5. Press the RUN switch and
monitor ITT temperature
drop.
Anti Flameout Operation:
(only if en ine is runnin )
Engage:
1. Press START and hold for 1
second.
2. Confirm TSLM li ht turn
ON.
Disengage:
1. Press RUN and hold for 1
second.
2. Confirm TSLM li ht turn
OFF.
ERROR codes (via TSLM light):
(Acknowled e / reset errors by pressin START or
RUN for 1 second)
1. Internal error (solid on or blinkin slowly)
2. ITT error – ITT above 200 ºC, or wirin fault.
3. VOLT error – Bus volta e too low or faulty.
4. EHT error – Limitin circuit disabled or faulty.
5. N1 error – No N1 si nal detected durin RUN
6. ISOL error – Start attempted in ISOL without
double-click (pre-start checks override)
7. Memory error – History lo more than 90% full
Notes:
To bypass the TSLM pre-start
checks initiate the start by pressin
START twice in quick succession
(double-click instead of one click).
06/29/16 © 2016 VR Avionics pa e 10 of 33

TSLM - M601 Operational & Install Manual
Electrical & Mechanical Specifications
Power Requirements 10 to 32 VDC
Supply Current (start or run sequence) < 10 A
Supply Current (monitorin only) 50 mA
Operatin Temperature -40°C to +85°C
Stora e Temperature -55°C to +125°C
Dimensions (SN 7001 and later
Wei ht 180 (0.4 lb)
Dimensions 100 x 75 x 25mm (3.94" x 2.95" x 0.98")
06/29/16 © 2016 VR Avionics pa e 11 of 33

TSLM - M601 Operational & Install Manual
Dimensions (SN 5001 – 6200
Wei ht 350 (0.772 lb)
Dimensions 150 x 95 x 35mm (5.9" x 3.74" x 1.38")
RS232 Data Interface (SN 5001 – 6200
The TSLM uses a RS232 interface (9600 baud, 8 data-bits, 1 stop-bit, no parity) to link to a
Personal Computer, Laptop or similar device. The pins used on the DB-9 port are as follows:
2 – RXD
3 – TXD
5 – GND
The TSLM will transmit a stream of data 10 times per second out on pin 2. Please contact VR
Avionics should you require detailed protocol information.
06/29/16 © 2016 VR Avionics pa e 12 of 33

TSLM - M601 Operational & Install Manual
Installation
Tools and Equipment
Tools and equipment required for installation (not included in the purchase) are:
✔Wire cutters
✔Wire strippers
✔Wire (sin le core, Teflon insulated 20 AWG)
✔Thermocouple wire (K-type)
✔Connector crimp tool
✔DB-25 female connector with crimp pins
✔Personal computer runnin Windows 98 or hi her, with a spare serial port. If no serial port,
a USB port to ether with a USB-to-Serial adapter will do.
✔Standard RS-232 cable (DB-9 male to DB-9 female)
✔Torque and Oil Pressure transducers (see pa e 23)
Description Part Numbers
Crimp contacts M24308/10-1 M39029/63-368 AMP 205090-1
Crimp tool M22520/2-01 AFM8 (DMC)
Crimp tool positioner M22520/2-08 K13-1 (DMC)
Insertion tool MS1969/1-02 DAK 145
Extraction tool MS1969/1-02 DAK 145
06/29/16 © 2016 VR Avionics pa e 13 of 33

TSLM - M601 Operational & Install Manual
Electrical Installation
The followin section describes the wirin requirements for usin the TSLM. Please follow these
instructions explicitly as improper wirin can result in permanent dama e to your unit. All electrical
power and data lines interface with the TSLM via the 25-pin D-Sub connector on the side of the
unit.
Important Note:
After completin the TSLM system installation, verify it by performin the followin tests before you
do the first en ine start:
➔Do a Dia nostic Test (Dia nostic Test and Troubleshootin , pa e 33)
➔Do a RUN/MOTOR sequence (Run Operation, pa e 7)
Recommended wiring practices
NOTE: For all electrical connections, use correct splicin techniques, takin care to properly
insulate any exposed wire. A short circuit between any of the wires may cause dama e to the
TSLM and/or other equipment.
VR Avionics does not supply connectors or wire for wirin up your TSLM. We recommend that
standard aircraft rade wirin and connectors be used durin installation. 20 au e wire is
sufficient for most lines to the unit. Make sure you protect the power lines with either a circuit
breaker or fuse sized appropriate to the wire you select. We recommend you use wire meetin Mil
Standard MIL-W-22759/16 (Tefzel insulation) which is available from various suppliers. Another
option is to use Teflon insulated wire which is available in various colors.
Connectors: We recommend you use machined pin connectors to mate with the TSLM connector.
Crimp connections have proven to be the most reliable in aircraft installations. D sub shells to hold
the pins are available from various sources. Purchasin quality connectors is a very wise
investment.
Installin : Make sure all connections are secure and all wires are routed and strain relieved to
ensure the wires will not chafe a ainst any other object in the aircraft.
06/29/16 © 2016 VR Avionics pa e 14 of 33

TSLM - M601 Operational & Install Manual
Electrical installation of the TSLM system is divided in sections accordin to function. Sections
marked as ‘optional’ are not required for proper operation, but are recommended. The followin
sections are the minimum requirement:
Power and Ground
I nition Circuit
Start/Run Selection
Start Interrupter Valve
Start Contactor
Limitin (EHT) Circuit
TSLM Status Li ht
Exceed Li ht
Volta e Sensin
Gas Generator Speed Sensin (N1)
Propeller Speed Sensin (N2)
Inter Turbine Temperature Sensin (ITT)
Power and Ground
The maximum current drawn by the TSLM unit is 10 Amps, thus we have to ensure the circuit-
breaker and the positive power wire will carry this current. This can be achieved by runnin one 16
AWG wire into one side of a solder-sleeve and two 20 AWG wires on the other side. The two 20
au e wires then o to pins 12 and 24 of the TSLM module. The round wire will not be carryin
lar e current, which means a sin le 20 AWG wire to pin 13 will be sufficient.
Figure 1 Power and Ground Wiring
06/29/16 © 2016 VR Avionics pa e 15 of 33

TSLM - M601 Operational & Install Manual
Ignition Circuit
The i nition circuit consists of either one or two exciter (i niter) boxes that enerates pulses to the
spark plu s. The TSLM is capable of powerin two exciter boxes with power requirements of up to
5 Amp each and also allow for independent i nition checkin throu h a to le switch. The next
fi ure shows the wirin dia ram for a sin le exciter i nition circuit. The sin le exciter is able to
drive both spark-plu s.
Figure 2 – Single Exciter Ignition Circuit Wiring
When usin two separate exciter (i niter) boxes, each one only capable of drivin one spark-plu ,
the i nition circuit in the followin fi ure may be used instead…
Figure 3 Dual Exciters Ignition Circuit Wiring
06/29/16 © 2016 VR Avionics pa e 16 of 33

TSLM - M601 Operational & Install Manual
Start/Run Selection
To initiate either the start or run sequence two wires from the TSLM need to be connected.
Groundin the start wire (pin 20) will initiate a start attempt, while roundin the run wire (pin 19)
will initiate a run sequence. The fi ure below shows how the start/run selection can be
accomplished usin a momentary to le switch.
Figure 4 – Start/Run Switch Wiring
Start Contactor
The start contactor is used to en a e the starter motor durin the start process. The dia ram
below shows how to connect the TSLM to the start contactor. The thick cable from the start
contactor runs to terminal C on the starter/ enerator.
Figure 5 – Start Contactor Wiring
06/29/16 © 2016 VR Avionics pa e 17 of 33

TSLM - M601 Operational & Install Manual
Start Interrupter Valve
The start interrupter valve re ulates the fuel to the two torches and is used durin the start process
and in anti-flameout operation. For older TSLM SN 5001-6200 units there are two ways to wire the
interrupter to the TSLM module – the normal way and the alternative way. On the newer TSLM (SN
7001 and up) units you must wire it the normal way. In the normal way the interrupter is activated
with a positive volta e on the valve’s pin A as shown below.
Figure 6 Normal Interrupter Wiring
The alternative way on the other hand activates the interrupter valve by roundin pin V instead as
shown below.
Figure 7 Alternative Interrupter Wiring
Important:
For an older TSLM (SN 5001-6200) the unit needs to be confi ured to either the normal or
alternative interrupter settin . The SetView Software chapter explains how to do it. The
confi uration property to be set is called ‘Alternative Interrupter Activation’. If you choose the
alternative circuit, this confi uration property needs to be set to 1 instead of 0 as explained in the
Alternative Interrupter Activation settin .
06/29/16 © 2016 VR Avionics pa e 18 of 33

TSLM - M601 Operational & Install Manual
Limiting (EHT Circuit
The limitin valve or EHT (electro-hydraulic transducer) is used to restrict fuel flow to the en ine
when activated. As a precaution we recommend incorporatin a LIMIT ENABLE switch as shown
below. This switch allows the pilot to remove any doubt that the TSLM may be activatin the EHT
valve when it is not supposed to.
Figure 8 – EHT wiring with Limiter Enable Switch
Alternatively a LIMITER DISABLE switch can be incorporated as shown below.
Figure 9 – EHT wiring with Limiter Disable Switch
06/29/16 © 2016 VR Avionics pa e 19 of 33

TSLM - M601 Operational & Install Manual
TSLM Status Light
The TSLM drives an annunciator or panel li ht in the cockpit that provides feedback to the pilot
concernin the status of the TSLM system such as error codes. The TSLM li ht's wirin in the next
fi ure shows the common circuit-breaker that may be used for the whole annunciator system.
Figure 10 Status Light Wiring
Exceed Light
The TSLM drives another annunciator or panel li ht in the cockpit as shown in the followin
dia ram. Thou h not absolutely necessary we do stron ly recommend installin this li ht. It li hts
up durin start-up of in-fli ht when an exceedence occurs, or is about to occur if no corrective
action is taken. You can leave this out if not wanted or if this functionality is already provided for.
Figure 11 Exceed Light Wiring
06/29/16 © 2016 VR Avionics pa e 20 of 33