CAN-Bus connectors
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imc CANSAS Getting Started - Doc. Version 1.9 - 05.12.2014
© 2014 imc Meßsysteme GmbH
3.2 Power Supply
3.2.1 Standard modules power supply
There are two possibilities for supplying imc CANSAS-modules with power:
via the green Phoenix-jack labeled "POWER", or
via the CAN-bus (+SUPPLY / -SUPPLY).
Supplying power via the CAN-bus-connectors has the advantage that it can be conducted further down
the CAN-bus through the module and thus drive a cascade of modules as the sole supply.
Phoenix - socket
pin number (front view)
name
comments
1 (left)
-SUPPLY
0V
2
-SUPPLY
0V
3
+SUPPLY
+10 V...+50 VDC
4 (right)
+SUPPLY
+10 V...+50 VDC
*for all types build from 2010. Before 9 V to 32 V. Exception: BRIDGE2 is build with 9 V to 32 V supply. (See identification plate of the module
also.)
Note
Note that the cumulative current for all connected devices flows through the CAN-bus power
supply lines. Since D-SUB plugs are nominally designed to take 1 A rated current per pin, a
maximum of three imc CANSAS modules should be supplied via the CAN-bus connection (with 12 V
supply voltage and approx. 4W consumption per module, 1 A cumulatively flows in the 3 modules).
If commercially available 9pin DSUB-cables are used, which tend to have high Ohm-counts, voltage
loss in the lines must be taken into consideration (the input voltage measured at the module must
not be less than 9 V!). To avoid that problem, choose a higher voltage, e.g. 24 V.
The connectors at the Phoenix-terminal and those for the CAN-bus are not connected internally
but are separated from each other by diodes. Therefore, make sure that the imc CANSAS module is
supplied with power via only one of the two possible ways!
Note when arranging the power supply that the starting current is greater than the long-term
current. Also observe the remarks on CAN-bus wiring above.
The imc CAN-bus connectors made for imc devices do not meet imc CANSAS-module specs, but
can under certain circumstances be modified by imc to do so. Please contact our customer support
if interested.
