5
Connectors
3 Wiring components
Instruction book, Mounting and maintenance
CAN-bus
The conductors for CAN-H and CAN-L should be a twisted pair, 40 twists per meter.
This is made to minimize the risk of EMI interference. Shielded cables must not be
used. The maximum length of the bus between modules is 100 meters (325 ft.). The
recommended nominal length is 40 meters (130 ft.).
CAN-bus terminator
The end of the CAN bus must be terminated. Termination is usually done inside the
IQAN expansion units, determined by the use of an idTag. Some modules may not have
this feature and require a terminating resistor. If the terminator is not bought from the
manufacturer, it must have a resistance of 120 ohms. The resistor must be able to
handle a power loss of 8 watts in case of a short-circuit between chassis and +24 Vdc.
Connectors
The connectors in IQAN systems are of two main types:
•
Deutsch transportation connectors.
•
AMP/Tyco automotive connectors.
The AMP connectors use two sizes of pins, JPT (Junior Power Timer) and MT (Micro
Timer) pins.
The following connector descriptions and crimping information will be general in
nature, for more detailed AMP/Tyco connector and crimping information, please visit
the AMP/Tyco website,
www.tycoelectronics.com.
For Deutsch connector and crimping information, please visit the Deutsch website,
www.deutschipd.com.
Deutsch connectors
The IQAN modules that are equipped with Deutsch connectors use either DT or DTM
types. These are keyed and equipped with a locking mechanism. The lock for the
connectors is either a single or dual plastic clip.
Deutsch connectors, IQAN-MD3, IQAN-LST/LSL, sensors
AMP/Tyco connectors
There are a few non-automotive AMP connectors used for IQAN products. These are
keyed and equipped with a locking mechanism. The lock for the non-automotive
connectors are either a spring clip or plastic clip.
AMP connectors, IQAN-LM/LL, IQAN-SP