Installation / Operation Manual
System Control Unit
16.03.2021 | V1.04
-15-
Pin Number
Signal Name
Function
1
PWR_IN
do not connect
2
CANL_B
CAN Low, connect to HIC B, Pin 7
3
EXT_PWR_ACT
do not connect
4
EXT_DIN5
do not connect
5
GND
do not connect
6
EXT_DIN3
do not connect
7
CANH_B
CAN High, connect to HIC B, Pin 8
8
EXT_DIN4
do not connect
9
SPARE
do not connect
Table 5-4: Lane B pinout
The Lane C Connector carries the third CAN Lane for the isolated output of the combined data from
Lanes A and B to a third party display via the CANaerospace protocol.
Pin Number
Signal Name
Function
1
RS422RXA
do not connect
2
CANL_C
CAN Low, connect to external display
3
RS422RXB
do not connect
4
RS422TXA
do not connect
5
RS422TXB
do not connect
6
GND
do not connect
7
CANH_C
CAN High, connect to external display
8
DEBUG_TXD
do not connect
9
DEBUG_RXD
do not connect
Table 5-5: Lane C pinout
5.2
Auxiliary Connector
The Auxiliary Connector is used for general I/O purposes. It offers regulated 12 V (Pin 13) and 5 V (Pin
11) reference voltages for sensors and can supply a maximum of 100 mA each. Both supplies are
referenced to a common ground (Pins 5 and 12) isolated from the aircraft supply potentials. The analog
inputs also refer to the same potential. The maximum analog input voltage is ±10 V. Note that higher
voltages can permanently damage the unit as no protection is implemented on these inputs. It is
recommended to use the analog inputs as shown in Table 5-6 and Figure 5-3.
It is recommended to place the optional fuel pressure sensor either as close as possible to the fuel
pressure regulator on the fuel rail of the left cylinder bank (Cylinders 2 and 4) or on the outflow port
of the fuel filter. The installation of the fuel pressure sensor on the fuel rail is marked in red in Figure
5-2. The available adapter (see Chapter 5.7) allows mounting it in both these places. A fuel pressure
sensor with the following specifications is available as an accessory and supported by the standard
software (see Chapter 5.7):
