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Regular price $2,550.00 USD
Regular price Sale price $2,550.00 USD
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Emtron’s SL4 is a wire in ECU with extreme flexibility. This ECU will support up to 4 Channels of fully sequential Fuel and Ignition.  Every unit is housed in a durable billet Aluminium enclosure and includes 32MB permanent memory for onboard logging, 4-channel oscilloscope function, DBW control, Knock control using digital filter technology, high-speed Ethernet communications and 3-axis G-force sensing to name a few.

SL4 ECU Pinout - Emtron
SL4 ECU Datasheet - Emtron 


1.0 General


Power Supply
Operating Voltage: 6.0 to 22.0 Volts DC (ECU shutdowns at 24.0V)
Operating Current: 290mA at 14.0V (excluding sensor and load currents)
Reverse Battery Protection via External Fuse
“Smart” battery transient protection
Operating Temperature
Max operating range: -30 to 110°C (-22 to 230°F)
Recommended operating range: -30 to 85°C (-22 to 185°F)
Aluminium 6061 grade CNC billet enclosure
Enclosure size 120 mm x 130 mm x 27 mm
Weight: 470g
Connector system: 68-way Super Seal waterproof connectors with gold plated contacts
Pin diameter: 1 mm
Current rating: maximum 15A per pin (wire gauge dependant)
Connector A: 34 pin Key 2 Super Seal
Connector B: 34 pin Key 1 Super Seal
Dual 100MHz processors
500Mb DDR RAM (0.5Gb)
32MB ECU logging memory. Over 1200 channels available, 1Hz to 500Hz logging rate
Oscilloscope 4-channel function with 32MB storage
Sampling at 100k samples/second
Includes Crank Index and Sync sensor inputs
Includes Digital Inputs 1-4
On-Board barometric pressure sensor. Range 40 – 115.0 kPa
3-Axis accelerometer. 16-Bit resolution, +2g/+4g/+8g dynamically selectable full-scale

2.0 Outputs

4x Port Injector Outputs—high ohm
70V clamping
Outputs can be used for ground switching, 6A Continuous, 10A Limit
All outputs are short circuit and over current protected
No Flywheel diodes (external diode(s) required for VVT control)
4x Ignition Outputs
Adjustable TTL Ignition drive current (35mA or 70mA)
Outputs can be used for ground switching, 1A Continuous, 3A Limit
All outputs are short circuit and over current protected
No Flywheel diodes (external diode(s) required for VVT control)
10x Auxiliary Outputs
Variable Valve Timing (VVT) and Variable Valve Timing Electric (VTiE), Drive by Wire (DBW), dual boost control, gearshift solenoids, stepper motor and many more.
All outputs have PWM control, maximum frequency = 15 kHz
Flywheel diodes integrated into all outputs
All outputs are short circuit and over current protected.
Low Side Driver Auxiliary 1-4: 4A continuous, 6A peak modulated, 8A limit
Low Side Driver Auxiliary 5-8: 2.5A continuous, 4A peak modulated, 5A limit
High Side Driver Auxiliary 1-8: High Side 4A continuous, 9A limit
Half Bridge Driver Auxiliary 9-10: 5A continuous and 8A limit. Can be used as Low Side, High Side or together in H-bridge configuration for DC motor control (DBW)
1x EFI Relay Output
Low Side Driver for relay control. Current limited to 200mA
1x Shield Output
Connection for Trigger and Knock shielded cables. Short to battery protection

3.0 Inputs

10x Analog Voltage/Temperature Inputs
Fully configurable including custom calibrations
Switchable 1k ohm pull-up resistors on ANV 7-10
Accepts a 0.0 – 5.0V analog input. Resolution is 1.22mV (12-Bit)
6x Digital/Speed Inputs/Switched Inputs
Frequency range from 0.0Hz up the 30.0kHz on all 6 channels
Magnetic and Hall effect sensor compatible on DI 1-4 with programable trigger edge(s)
Hall effect sensor only on DI 5-6 with programable trigger edge(s)
Independent programable frequency-based arming threshold control, range 0.0 – 12.0V on DI 1-4
Fixed frequency-based arming thresholds on DI 5-6. Rising = 1.2V, Falling = 1.0V.
Wheel speed, output shaft speed and other frequency-based signals
VVT position(s) up to 4 channels available on DI 1- 4.
ON/OFF switched inputs: AC request, Launch enable, cruise switch, table control switching etc with arming threshold control, range 0.0 -20.0V
Accepts a 0.0 – 20.0V analog input. Resolution is 4.88mV (10-Bit)
Switchable 4k7 ohm pull-up resistors on all 6 channels to 10V
2x Knock Inputs with configurable Frequency and Gain.
Using Bosch digital knock integrated circuit technology
Selectable center frequency from 500Hz – 25kHz
Selectable bandwidth from 100Hz – 5kHz
Selectable digital filter window; Hamming or Blackman
1x Dedicated Ignition Switch Input
0 – 20.0V input used for EFI Relay Control. (With input > 4V the EFI Relay output (D9) will switch ON)
2x Crank Index and Sync Engine Decoding Inputs
Magnetic and Hall effect sensor compatible with programable trigger edge(s)
“True” zero crossing detection on magnetic signals for precise engine position decoding.
Programmable independent arming threshold control from 0.1V to 12.0V
Switchable 4k7 ohm pull-up resistor to 5V
OEM patterns supported

4.0 Voltage and Ground Supplies

1x ECU Supply Input
15.0A Max (pin limited)
6V – 22.0V Range
Supplies ECU power
Supplies power to Auxiliary 1-8 High Side Drivers
1x Auxiliary 9-10 Supply Input
15.0A Max (pin limited)
Power supply for Auxiliary channels 9 -10.
1x 5.0V Sensor Supply
5.0V Vref1 output current 250mA
1x 8.0V Sensor Supply
Output current 400mA
2x ECU Main Grounds
15.0A per pin, total 30A
1x Sensor 0V Reference
Analog Sensor 0V Reference with short to battery protection

5.0 Communications

1x high speed Ethernet 100Mbps
1x CAN 2.0B 1Mbps/ 6 Channels per node, total 64 messages

6.0 Software

Emtron’s comprehensive Emtune tuning software is used to connect to the ECU.

Microsoft Windows 7 -10 compatible
Free licence
Memory requirements: 0.5GB RAM
ECU connection using Ethernet, IPV4 protocol
Tuning and data analysis
PC and ECU data logging
Live pause and data playback
Advanced tuning functions
Oscilloscope display


Weight .64 kg
Dimensions 18 × 18 × 6 cm


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