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HPS-100 Datasheet, PDF (6/24 Pages) ams AG – Automotive Hydrogen Sensor
HPS-100− ElectricalInterface
CAN Bus Interface
This section describes the CAN bus interface that is available in
some variants of HPS-100.
Physical Interface
The physical interface is two-wire balanced. It is a high speed
CAN interface (ISO 11898-2) with bus bit rate at 500 kbit/s.
CAN Matrix
HPS-100 will send the first CAN message within 0.1 s after reset.
The repetition rate of the CAN messages is 100ms ± 2ms. The
first H2 concentration will be delivered after 5 s. The CAN
messages prior to that will have the Not_ready bit set,
indicating that the concentration value of the message is not
valid.
In case of a warm restart (<5 s) error category 1 will be set for
10 s. The Msg Counter increments with each CAN message.
The CAN message has the ID 1120 (0x0460). The byte 7 is not
used and has the value 0.
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[v1-00] 2015-Apr-06