TANDELTA OQSExISG2, Руководство пользователя

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11.4 J1939 on CANbus
The OQSx Oil Quality Sensor measures the Oil Condition, Oil Temperature and Ambient (Sensor)
Temperature. The range is from a nominal -20% to +60% Oil Condition units and -30 to +130C.
The measured value is transmitted on the CAN-bus using the J1939 protocol based on the SAE
J1939 standards J1939-DA August 2018, J1939-21 October 2018 and J1939-82 June 2015. The
Sensor samples internally at 100 samples per second, filters and converts the raw signal to a
conditioned output signal and outputs the Oil Condition and Oil Temperature periodically every
10s.
The CAN interface uses a default bit rate of 250 kb/s with 29 bit identifiers. 500 kb/s is also
available.
The CAN protocol complies with the SAE J1939 standard and the Oil Quality Sensor implements
2 PGNs for transmission of process values. PGN 65262 (0xFEEE) is used for Oil Temperature and
PGN 65279 (0xFEFF) is used for Oil Condition. The sensor is Single Address Capable (not
Arbitrary Address Capable) with Command Configurable Addressing; it does not support Service
Configurable or Self-Configurable Addressing.
11.4.1 CAN Interface
The Sensor uses a full CAN controller specified to conform with CAN 2.0B. The physical layer of
the 2 wire interface is specified according to ISO 11898. The wires are protected against short
circuit and noise emission is minimized. No bus termination resistors are included within the
sensor.
11.4.2 OQS-CAN Specification
Supply voltage: +9 to +30 Vd.c.
Current consumption: 50mA max. when quiescent, 100mA max. with CAN active
30-40mA typical
CAN physical layer: 2 wire interface @ 5V d.c. voltage levels a/c to ISO 11898
Short circuit protected
CAN bitrate: 250kbit/s default
Bus termination: External
Protocol: J1939-DA August 2018, J1939-21 October 2018 and J1939-82
June 2015
Environment: noise emission according to EN 50 081-2
Noise immunity according to EN 50 082-2
Operating temperature: -20 to +120C
Storage temperature: -40 to +150C
11.4.3 Connection Details
The sensor uses a Bulgin 4000 series male connector with the following pin assignments: -
P1: +9 to +30V d.c. power supply
P2: Analog 4-20mA Oil Temp output (active, current sourcing)
P3: Analog 4-20mA Oil Condition output (active, current sourcing)