FXL35 (25 July 2006)

The FXL35 is a 35 Channel Data Logger designed specifically for V8 engined racecars used in Supercharged Outlaws, Group 2 and Group 3 drag racing.

This is a well developed, proven, mature product, derived from the highly successful FXL25.

The logger monitors up to:

4 switching inputs standard

• Wide Open Throttle to trigger the recording
• Voltage seeking two step or transbrake as a record inhibit (Older MSD and newer Dyna)
• Earth seeking two step record inhibit (Older Dyna and newer MSD)
• Extra 12 volt event timer (shift light or gear shift or Nitrous solenoid indication)

Four rpm's.

• Engine RPM from the tacho terminal of the MSD or Dyna
• Input shaft RPM for manual transmissions. (Optional sensor required)
• Output shaft RPM (Probably the most important thing to monitor)
• Front right hand wheel speed (Read the rule book if you run in Group 3)

(Optional sensors may be required if the vehicle uses a magneto or a manual transmission.)

Eight exhaust gas temperatures standard.

• Eight K type thermocouples (with hotter reading open tips)

Oxygen sensing

• Two oxygen sensor inputs standard (*read the page on oxygen sensing. Customer is to supply the oxygen sensors and wiring)

Battery volts monitoring standard

Pressure sensing (Optional. Up to four sensors in the "Four Pack")

• Fuel presssure (200 psi for mechanical fuel injection or 50 psi for carby pressure)
• Boost pressure (100 psi nominal or 50 psi)
• Engine oil pressure (200 psi is nominal)
• Auto transmission oil pressure (200 psi is nominal)

NO pressure senders are to be mounted in the cabin, according to the rule book.

Sump vacuum may be done with a Commodore MAP sensor (Manifold Absolute Sensor) and scoop pressure with a low pressure sensor. Both are kept away from the Four Pack in case of accidental connection to high pressures that would destroy them.

Suspension movement detectors (Optional. Need the Four Pack to adapt the wiring)

• Left front
• Right front
• Left rear
• Right rear

These sensors are based on the idea of moving a magnet near a linear Hall Effect sensor. The voltage of the Hall Effect sensor changes in proportion to the gap and this is monitored by the logger. The wiring for each sensor adapts through the Four Pack.

Temperature Sensing with up to 3 K type thermocouples.

• There are three optional inputs for K type thermocouples that may be used for monitoring boost temperature, water temperature or oil temperature. Any thermocouples used for monitoring liquid temperatures must be closed tip thermocouples.

Four Spare 0 - 5 volt inputs

• There are four unallocated 0 - 5 volt inputs that the customer may use for any other functions they may require. The customer is expected to know how to wire the plug and must ensure the sensor that is connected to the logger DOES NOT EXCEED 5 volts, or the logger could be damaged or destroyed.

Technical Specifications: 25 July 2006

RPMs: Up to 4. Only Hall Effect Switches are used as these have a high immunity to RF interference. These Hall Effect Switches are only triggered by the South end of a magnet. Engine rpm can also be monitored if the vehicle has an MSD or Dyna or similar ignition with a tacho terminal. The logger can pick up from the tacho terminal, saving the cost and difficulty of mounting a sensor and magnets to the crank. Input shaft rpm sensing can be done on a manual transmission. It is virtually impossible with an auto because the pump drive is in the way.

Switch Monitors: Up to 4. Wide Open Throttle is essential to trigger the recording. The others are two step or transbrake monitor which is used as ' Record Inhibit ' so the vehicle can go to Wide Open Throttle on the line, but not trigger the recording. A +12 volt shift light can be monitored as can a spare input, usually for a nitrous solenoid. On the FXL22, this input is an earth seeking inhibit line to suit Dyna Ignition two steps.

Thermocouples: Up to 8 K Type ( Yellow Connectors ) isolated from earth can be used to monitor exhaust gas temperature. Only open tip thermocouples are used. There is provision for up to three extra thermocouples to monitor temperatures from 0 - 255 Celsius.

Pressure Senders: Up to 4 in the "Four Pack" only.

Suspension Movement Detectors: The FXL35 was designed to be able to monitor up to four suspension movement detectors. The individual detectors get their power from the "Four Pack", so it is necessary to have the "Four Pack" before getting the suspension movement detectors.

Oxygen sensing: The FXL35 has two internal amplifiers that the customer may connect up to two oxygen sensors. Because the voltage from the oxy sensor is low, typically less than 1 volt, the logger has an amplifier to increase the voltage slightly. If the binary number produced by the logger is multiplied by 0.0069 then it will produce the original voltage made by the oxy sensor.

G Meter: Only one is needed. It is connected to the Thermocouple Amplifier Module.

Main module Connector pinouts.The FXL22, FXL25, FXL32 and FXL35 have one common connector which is where the RPM and Switch loom plugs in. This is a 25 pin ' D ' connector. Note that the FXL22 uses +5 Volts DC for its switches and rpm pickups and the FXL25, FXL32 and FXL35 use +9 Volts DC. The FXL32 and FXL35 are derived from the FXL25 and only one pin is different, that is Pin 10. On the FXL32 and FXL35 it was decided to make it an earth seeking record inhibit, the same as the FXL22, so it can accomodate early Dyna ignitions and late MSD ignitions which have earth seeking two steps.

The Four RPM cables will have heat shrink tubing for insulation and identification. The color corresponds to the color of the traces on the DOS based software.

• RPM 1 Engine RPM cable if fitted, will have Blue heat shrink.
• RPM 2 Input shaft RPM cable if fitted, will have Red heat shrink.
• RPM 3 Drive shaft RPM cable is always supplied as standard, will have Green heat shrink.
• RPM 4 Front Right Hand Wheel speed if fitted, will have Black heat shrink.

Pin Function: ( Viewed from behind the connector where all the wiring comes out )

• Pin 1 +12Volts main power - with short lengths of Red heat shrink.
• Pin 2 RPM 1 Signal - Engine rpm signal return. White/Blue wire.
• Pin 3 RPM 1 Power - Engine rpm sensor power. White/Orange wire.
• Pin 4 RPM 2 Signal - Input Shaft rpm signal return. White/Blue wire.
• Pin 5 RPM 2 Power - Input Shaft rpm sensor power. White/Orange wire.
• Pin 6 RPM 3 Signal - Drive Shaft rpm signal return. White/Blue wire.
• Pin 7 RPM 3 Power - Drive Shaft rpm sensor power. White/Orange wire.
• Pin 8 RPM 4 Signal - Front Right Hand Wheel speed signal return. White/Blue wire.
• Pin 9 RPM 4 Power - Front Right Hand Wheel speed sensor power. White/Orange wire.
• Pin 10 Dual purpose input. On the FXL25 it is a voltage seeking input usually used for monitoring when a Nitrous solenoid is switched on or off, and on the FXL22, FXL32 and FXL35 it is an earth seeking input used as a record inhibit to suit Dyna ignitions, new style MSD ignitons or Junior dragsters using a switch on the brake pedal. Usually has short lengths of blue heat shrink tubing for identification purposes.
• Pin 11 Wide Open Throttle switch power. This is a White/Blue wire which goes to either contact on the Wide Open Throttle switch. There will always be a companion White wire inside the cable. This White wire is an earth from the logger. The shield is earthed at the logger end of the cable. It is NOT earthed at the switch. Wrap insulating tape or put on heat shrink tubing at the switch end.
• Pin 12 Two Step or Transbrake switch input. Single White wire with short lengths of Green heat shrink tubing. This is a voltage seeking input on all models.
• Pin 13 Shift Light +12 volts input. Single White wire with short lengths of red heat shrink tubing. DO NOT Confuse this wire with the main +12 Volts input.
• Pin 14 Master earth. Has short lengths of Black heat shrink tubing.
• Pin 15 Earth for RPM1 Sensor
• Pin 16 Earth for RPM1 Shield
• Pin 17 Earth for RPM2 Sensor
• Pin 18 Earth for RPM2 Shield
• Pin 19 Earth for RPM3 Sensor
• Pin 20 Earth for RPM3 Shield
• Pin 21 Earth for RPM4 Sensor
• Pin 22 Earth for RPM4 Shield
• Pin 23 Earth for Wide Open Throttle Switch
• Pin 24 Earth for Wide Open Throttle Switch shield
• Pin 25 MSD or Dyna Ignition tacho terminal take off. This will have short lengths of Blue heat shrink tubing. Not to be confused with the nitrous switch input on pin 10.

Thermocouple connector for the FXL35.

25 Pin D connector (not compatible with the FXL22 or the FXL32.)

Top Row

Pin 1 is EGT 1 positive input YELLOW, matches pin 14, (0 - 1020 C)
Pin 2 is EGT 2 positive input YELLOW, matches pin 15, (0 - 1020 C)
Pin 3 is EGT 3 positive input YELLOW, matches pin 16, (0 - 1020 C)
Pin 4 is EGT 4 positive input YELLOW, matches pin 17, (0 - 1020 C)
Pin 5 is EGT 5 positive input YELLOW, matches pin 18, (0 - 1020 C)
Pin 6 is EGT 6 positive input YELLOW, matches pin 19, (0 - 1020 C)
Pin 7 is EGT 7 positive input YELLOW, matches pin 20, (0 - 1020 C)
Pin 8 is EGT 8 positive input YELLOW, matches pin 21, (0 - 1020 C)
Pin 9 is Thermocouple 9 positive input YELLOW, matches pin 22, (0 - 255 C)
Pin 10 is Thermocouple 10 positive input YELLOW, matches pin 23 (0 - 255 C)
Pin 11 is Thermocouple 11 positive input YELLOW, matches pin 24 (0 - 255 C)
Pin 12 is spare 0 to +5 volts only on FXL25, buffered input on FXL32 and FXL35 for the left oxy sensor.
Pin 13 is spare 0 to +5 volts only on FXL25, buffered input on FXL32 and FXL35 for the right oxy sensor.

Bottom Row

Pin 14 is EGT 1 negative input RED, matches pin 1, (0 - 1020 C)
Pin 15 is EGT 2 negative input RED, matches pin 2, (0 - 1020 C)
Pin 16 is EGT 3 negative input RED, matches pin 3, (0 - 1020 C)
Pin 17 is EGT 4 negative input RED, matches pin 4, (0 - 1020 C)
Pin 18 is EGT 5 negative input RED, matches pin 5, (0 - 1020 C)
Pin 19 is EGT 6 negative input RED, matches pin 6, (0 - 1020 C)
Pin 20 is EGT 7 negative input RED, matches pin 7, (0 - 1020 C)
Pin 21 is EGT 8 negative input RED, matches pin 8, (0 - 1020 C)
Pin 22 is Thermocouple 9 negative input RED, matches pin 9, (0 - 255 C)
Pin 23 is Thermocouple 10 negative input RED, matches pin 10, (0 - 255 C)
Pin 24 is Thermocouple 11 negative input RED, matches pin 11, (0 - 255 C)
Pin 25 is battery volts monitor. 0 to +25vdc only.

FXL35 Pressure Connector Pinouts:

This connector connects to the "Four Pack" module that has up to four pressures in it, plus the adaptors for the four suspension movement detectors. It is a 15 pin Dee connector. This connector has a unique pinout and is not compatible with any other FXL loggers.

Pin 1 Analog 1 Pressure 1, (0 to +5vdc, 1 kohm, 2u2)
Pin 2 Analog 2 Pressure 2, (0 to +5vdc, 1 kohm, 2u2)
Pin 3 Analog 3 Pressure 3, (0 to +5vdc, 1 kohm, 2u2)
Pin 4 Analog 4 Pressure 4, (0 to +5vdc, 1 kohm, 2u2)
Pin 5 Analog 5 Suspension Movement detector, front left (0 to +5vdc, 1 kohm, 2u2)
Pin 6 Analog 6 Suspension Movement detector, front right (0 to +5vdc, 1 kohm, 2u2)
Pin 7 Analog 7 Suspension Movement detector, rear left (0 to +5vdc, 1 kohm, 2u2)
Pin 8 Analog 8 Suspension movement detector, rear right (0 to +5vdc, 1 kohm, 2u2)

Pin 9 to 14 are earths.
Pin 15 is supply volts less 0.8vdc from the reverse polarity protection diode.

FXL35 Spare Connector Pinouts:

The FXL35 has a "Spare" connector. This is a 15 pin Dee connector that has 4 analog inputs plus several earths and a supply voltage pin.

Be very aware that pins 1 - 4 connect directly to the microprocessor. If you exceed 5 volts, or present a negative voltage to any of these pins, then you WILL DESTROY the microprocessor.

Pin 1 Analog (0 to +5v input, 1 kohm, 2u2) Spare
Pin 2 Analog (0 to +5v input, 1 kohm, 2u2) Spare
Pin 3 Analog (0 to +5v input, 1 kohm, 2u2) Spare
Pin 4 Analog (0 to +5v input, 1 kohm, 2u2) Spare
Pin 5 Not Used
Pin 6 Not Used
Pin 7 Not Used
Pin 8 Not Used

Pin 9 Earth
Pin 10 Earth
Pin 11 Earth
Pin 12 Earth
Pin 13 Earth
Pin 14 Earth

Pin 15 is supply voltage less approximately 0.8 volt from the reverse polarity protection diode.

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