© 2016 imc Meßsysteme GmbH
imc CANSAS - Getting Started, Doc. Rev. 2.0 R1 - 2016-05-24
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CAN-Bus connectors
3.1.3 CANSAS-SL with LEMO
The following overview shows the pin configuration of the CAN-bus sockets (CAN IN and CAN OUT) of the
imc CANSAS-SL housings. The differences to the standard imc CANSAS modules are described here.
3.1.3.1 CAN-Bus pin configuration and contact wiring
10-pin LEMO (HGA.1B.310)
PIN
Signal
CiA
â
-description
Use in imc CANSAS
1
CAN_HIGH
dominant high bus
line
connected as per CiA®
2
CAN_LOW
dominant low bus
line
connected as per CiA®
3
CAN_GND
CAN Ground
connected as per CiA®. CAN-Bus reference ground.
4
CAN_RST_STECK
imc CANSAS-specific: imc CANSAS Reset ( for startup with Reset
Connector). The Reset plug has a shortcut to PIN 3 (GND).
5
CAN_SYNC
imc CANSAS-specific: Additional line for a sync signal (1 Hz).
Generally 5 V to CAN Ground.
6
CAN_GND
CAN Ground
connected to Pin 3, as per CiA®
7, 8
+CAN_SUPPLY
imc CANSAS-specific: + imc CANSAS voltage supply
+10 V..+50 V. The module can be supplied via this connector
(and Pin 9 + 10).
9, 10
-SUPPLY
imc CANSAS-specific: - imc CANSAS voltage supply (Negative
pole of supply respectively. 0 V).
Both 10-pin sockets are directly connected. In that way all circuit points can be connected through to the
next imc CANSAS module.
Unless 10-line cables are used for the CAN-Bus, observe the following: Pins 1 and 2 are absolutely
necessary for transfer on the CAN-Bus. The CAN-Bus ground is also necessary. This may not be obvious,
but consider that differentially transmitted signals require a reference, for which reason a line connected
to the CAN-Bus ground must also be included. Either Pin 3 or Pin 6 can be used for this purpose.
Situations can also arise in which the CAN-ground is not needed: for instance, in a vehicle, where it is
possible to access Chassis potential anywhere, instead of using a line to Pin 3. In this case, Chassis simply
replaces the line to Pin 3.
Other lines can be included as required, for example a synchronization line or supply line.
Note also when using LEMO-plugs and the cables that there is a maximum current which LEMO-plugs can
carry. This particularly applies to the LEMO-plugs on the imc CANSAS-modules and the internal
connection of all of this plug's pins. The current should not exceed approx. 4,5A. It may be necessary to
use a correspondingly high supply voltage for the modules, or the separate terminal for the supply. Also
give regard to the cables' cross-sections.