Mar 5 2016
Comparison of different SECU-3 unit versions. Here we compare (in a nutshell) hardware features and capabilities, of SECU-3 Micro, SECU-3 Lite and SECU-3T units. Main features of the SECU-3 system described here.
|SECU-3T||SECU-3 Lite||SECU-3 Micro|
|Number of external connector’s pins||26||14||12|
|Number of outputs on the external connector||11||4||2|
|Number of inputs on the external connector||11||5||5|
|Number of synchronization inputs (CKP, cam, ref.sensor)||3||2||1|
|Embedded MAP sensor||Yes||Yes||No|
|Embedded ignition coils’ drivers||No||Yes (2 ch.)||No|
|Material of enclosure||plastic||metal||plastic|
|Insulation of interface||No||Yes||No|
|Short circuit and overload protection of outputs||No||Yes||No|
|Input for connecting of second CKP sensor (ref.sensor)||Yes||Yes||No|
|Input for connecting of CKP sensor (VR or Hall)||Yes||Yes||Yes|
|Input for connecting of camshaft position sensor||Yes||No||No|
|Installation of Bluetooth provided||Yes||No||Yes|
|Input for connection of narrow band oxygen sensor||Yes||No||No|
|Input for connection of intake air temperature sensor||Yes||No||Yes, but not leaded to
the external connector
|Connection of iButton provided||Yes||Yes||No|
|Maximum number of ignition channels||8||2||2|
|Provided connection of external MAP sensor||Yes||No||Yes|
|Input for connection of TPS||Yes||Yes||Yes|
|Fuel injection support||Yes||No||No|
|Output for controlling of idle cut off valve (carburetors)||Yes||Yes||No|
|Output for controlling of power valve (carburetors)||Yes||No||No|
|Smooth control of cooling fan’s RPM (using PWM)||Yes||No||No|
|Input for switching between tables (e.g. gas/petrol)||Yes||Yes||Yes|
|Software compatibility with other versions of SECU-3 units||Yes||Yes||Yes|
In the SECU-3T unit, some inputs and outputs are combined (input and output connected to the same pin of the external connector). Number of inputs/outputs specified in the above table is based on that ADD_I1 and ADD_O1 are connected to the ADD_IO1 pin, and ADD_I2 and ADD_O2 are connected to the ADD_IO2 pin. So, two pins and 4 I/O. However, by default, ADD_I1 input and ADD_O1 output are split (ADD_I1 is connected to KS_2, while input for second knock sensor is not connected anywhere).
In the SECU-3 Lite unit, REF_S2, REF_S1 pins of the external connector can be used for connecting of CLT sensor and leading outside of 5V correspondingly. By default, REF_S2 pin is used for CLT input, and therefore there are totally 5 inputs on the external connector.
For better understanding see corresponding schematic diagrams and installation manuals.
Comparison of units’ size on photos: