C8 voltage, temperature, current 271
imc CANSAS Users Manual - Doc. Version 1.9 - 05.12.2014© 2014 imc Meßsysteme GmbH
6.4.3.4 Thermocouple measurement (Type II: round plugs)
The cold junction required for the operation of thermocouples is located within the connector pod and
its temperature is measured and accounted for by the measurement device.
Thermocouple (isolated and referenced to external potential by
means of spot-welded contact)
The thermocouple is mounted in such a way that it already is in electrical contact with the imc CANSAS
module's ground/ chassis. This is ensured by attaching the thermocouple to a grounded metal body, for
instance.The thermocouple is connected for differential measurement. Since the C8 unit is grounded
itself, the necessary ground reference exists.
It is not a problem if the ground potential at the thermocouple differs from that of the imc CANSAS units
by a few volts. However, the maximum allowed common mode voltage may not be exceeded.
6.4.4 Module Sensor SUPPLY
The DSUB-15 connectors each provide a terminal for an optional supply voltage (±2%) for external
sensors.
When selecting a positive (unipolar) voltage supply (e.g. 5V), it is gripped between +Vs and GND. When
using a bipolar voltage supply (±15V), +Vs and –Vs must be connected to the sensor supply, GND is in
between then, which is 0V. For the imc CANSAS-SL-C8-L-SUPPLY there is only an unipolar voltage supply
available.
Without supply module, there is no voltage provided for connected sensors.
The supply voltage can only be set at one common setting which applies to all measurement inputs.
Important!
Before a sensor will be connected, make sure the voltage supply has been set correctly (not too high).
Therefore the voltage supply must be set and configured using the software. Then the sensor can be
connected. Otherwise the sensor and the imc CANSAS-module could be damaged.
The technical specification of the SUPPLY .
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