SMT8_4 TECHNICAL MANUAL

Perfect Power Online Manuals.

 

Support for your SMT8 V4 Unit.

CONNECTIONS

The SMT8_4 has 3 connectors and a USB communications port on the SMT8_4.

 

 

PIN-OUT TABLE

 

NOTE: The GROUND pin on the 10pin INJECTOR CONNECTOR is conducting CURRENT and therefore must be connected via heavy gauge wires to chassis

smt8 4-pinout

 

SMT8_4 MAIN CONNECTOR
(16 Pin Connector)

 

Pin Signal Description
1 +12V SUPPLY Switched Battery Supply
2 FREQIN Frequency input
3 AMPIN Absolute Manifold Pressure input
4 ENGTIN Engine Temperature input
5 NAFR1IN Narrow AFR/Lambda input #1
6 AN3OUT Analog # 3 output
7 CB1-OUT CB1 Negative Output
8 GND Signal ground
9 AN1IN Analogue #1 input
10 MAPSW Map switch input: Open=A, Short=B
11 AN2IN Analogue #2 input
12 AIRTIN Air Temperature input
13 TPSIN TPS input
14 NAFR1OUT Narrow AFR output #1
15 NAFR2OUT Narrow AFR output #2
16 GND Signal Ground

 

 

SMT8_4 INJECTOR CONNECTOR
(10 Pin Connector)

 

Pin Signal Description
1 GND Chassis Ground
2 A1OUT Analogue #1 output
3 GRQOUT Frequency output
4 A2OUT Analogue #2 output
5 CB1+OUT CB1 Positive Output
6 SP3OUT 1 Amp drive
7 SP1OUT 1 Amp drive
8 SP2OUT 1 Amp drive
9 WB2OUT Wide band #2 output
10 WB1OUT Wide band #1 output

 

 

SMT8_4 CRANK AND CAM CONNECTOR
(12 Pin Connector)

 

Pin Signal Description
1 CB1-IN CB1 Negative Input
2 CB1+IN CB1 Positive Input
3 CB2+IN CB2 Positive Input
4 CB3+IN CB3 Positive Input
5 CB1 – Bipolar Out CB1 Negative Bipolar Output
6 Speed Signal (IN) + Pull Up Speed Signal Input + Pull up
7 AN3IN Analogue # 3 Input
8 CB1 + Bipolar Output CB1 Positive Bipolar Input
9 CB2OUT CB2 Output
10 CB3OUT CB3 Output
11 NAFR2IN Narrow band AFR input #2
12 +5EXT 5volt, 50mA supply for sensors

 

Please note: As per the above diagram the 2 pin connector is needed for the Perfect Power Display Output. Please refer to the Display Manual.

 

 

SPECIFICATIONS

 

Power consumption: ~ 100mA (0,1A)
Power supply voltage: 8 – 36 V
Reverse Polarity Protection: Yes
Momentary power supply: up to 40 V, 5 ms
Signal input impedance: >10 K Ohm
Pull up: 2k2 Ohm
Ambient temperature: Up to 60 deg C (Passenger compartment)
Relay drives (3): 1A (SP1, 2 and 3)
Ignition signal outputs 6 x: 2K2 to + 12 V, switched to ground, max 10mA
Injector drive 2 x: 1 Amp, 13-Ohm injector (SHARED with relay drives)
Analog output drive 2 x: 0.005 Amp (5 mA), 0 - 5volts
Analog input range: 0 - 5 Volts
Narrow band input range: 0 – 5 Volts
Wide band input range: 0 – 3.3 Volts