Kanardia Boxi II, Руководство пользователя

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Boxi II – Manual 2.1 Control Logic
Description Value
Weight 93 g
Size 100 x 76 x 21 mm
Operational voltage 6 to 36 V
Power consumption 0.45 W
1
Current 36 mA @ 12 V
1
PTT Outputs Solid-State relay, max. 50V/0.5A
Motor Outputs MOSFET full-bridge, max 36V/1.5A
Operating temperature -20
◦
C to +85
◦
C
Humidity 30 % to 90 %, non condensing
Communication CAN bus, 29 bit header, 500 kbit,
Kanardia protocol
Table 1: Basic technical specifications.
2.1 Control Logic
The heart of the unit is a microprocessor which has two primary functions: for-
warding CAN messages between both CAN buses and controlling the outputs.
It also implements several fail-safe mechanisms which defines output states
in case of disrupted CAN communication or system failure. Control logic is
powered from a separate power supply connector.
Beside controlling the outputs the microprocessor is also monitoring the status
of the outputs. In case of any problem detected it reports the error state to
the main bus.
2.2 CAN Bus Interface
System consists of two isolated CAN interfaces: primary CAN bus and Joyu
CAN bus. All CAN messages from one bus are forwarded to the other bus.
The main purpose of implementing isolated Joyu CAN bus is eliminating CAN
bus topology problems and to minimize the possibility for Joyu CAN bus mal-
function.
Due to the topology used the Boxi and Joyu units will operate even in the case
of severe problems on the main bus, or if there is no device connected to the
main bus at all.
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