TANDELTA OQSExISG2, User Manual

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The CAN interface uses a default bit rate of 125 kb/s with 11 bit identifiers.
The CAN protocol complies with the CANOpen specification DS301 and the Oil Quality Sensor
conforms to CANOpen device profile DS404. Node Guarding and Emergency messages are
implemented to ensure high reliability.
11.2.1 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.
11.2.2 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: 125kbit/s
Bus termination: External
Protocol: CANOpen DS301, Device Profile DS404
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
11.2.3 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)
P4: CANL/RS485A
P5: 0V
P6: CANH/RS485B
11.2.4 CANOpen Communication
11.2.4.1 Summary of the CANOpen functions
CANOpen type: NMT slave
Network bootup : Minimum bootup
COB ID: pre-defined connection set, SDO
Node ID: object (specific entry – read/write, default 1 )