GridConnect CAN232 FD, Руководство пользователя

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2-6 CAN232 FD User Manual
The RS232 signals are brought out to the OEM connector at J11. Power can be supplied through pin 1 and
Ground is tied to pin 9.
2.2.5 Configuration Push Button
Pressing the recessed push button for less than 3 seconds will put the processor into configuration mode.
Pressing the recessed push button for MORE than 3 seconds will reset the unit to factory defaults.
See the Configuration Mode chapter for detailed operation.
2.2.6 CAN Driver
The TCAN1042 is a CAN transceiver that meets or exceeds the specifications of the ISO11898-2 (2016)
High Speed CAN (Controller Area Network) physical layer standard. The device is designed for use in CAN
FD networks up to 5 Mbps (megabits per second). Additionally, the device includes many protection
features to enhance device and network robustness.
The TCAN1042 is characterized for operation over the ambient temperature range of
–
40
°
C to 125
°
C.

Failsafe Outputs

Meets or Exceeds ISO 11898-2 requirements

Bus Fault Protection: ±58 V

Dominant Time-Out Function

IEC ESD Protection up to ±15 kV
DOMINANT TIME-OUT
A dominant time-out circuit in the TCAN1042 prevents the driver from blocking network communications
if a local controller fault occurs. The time-out circuit is triggered by a falling edge on TXD. If no rising edge
occurs on TXD before the time-out of the circuits expires, the driver is disabled to prevent the local node
from continuously transmitting a Dominant bit. If a rising edge occurs on TXD, commanding a Recessive
bit, the timer will be reset and the driver will be re-enabled. The time-out value is set so that normal CAN
communication will not cause the Dominant time-out circuit to expire.
FAILSAFE
The supply terminals have undervoltage detection that places the device in protected mode. This protects the
bus during an undervoltage event on either of the supply terminals.