INC4 incremental encoder channels 339
imc CANSAS Users Manual - Doc. Version 1.9 - 05.12.2014© 2014 imc Meßsysteme GmbH
6.13 ISO8 isolated voltage channels with current and temp. modes
8 differential, analog inputs
4 channels on each DSUB-15 socket
Measurement modes
CAN/ISO8, CAN/ K-ISO8
voltage
voltage with divider
current
thermocouples
Pt100
configurable in blocks of 4
standard-plug (CAN/DSUB-U6)
divider-plug (CAN/DSUB-U6D)
shunt-plug (CAN/DSUB-I6)
thermo-plug (CAN/DSUB-T6)
Pt100-plug (CAN/DSUB-PT):
4 channels with contacts for 4-wire connection
or voltage plug (CAN/DSUB-U)
6 channels without contacts for 4-wire connection.
CAN/ K-ISO8-2T
CAN/ K-ISO8-3T
TK-connector 2 pol. IEC 584 (green)
TK-connector 3 pol. IEC 584 (green)
Technical data ISO8.
The imc CANSAS ISO8 module comes with 8 isolated input channels, which can carry your choice of
voltage, current, Pt100 or any DIN-conforming thermocouples' signals. However, it is only possible to
measure with multiple thermocouples at the same time if they are all of the same type. The input ranges
correspond to those of the imc CANSAS C12 module.
A variety of different housing models are available. The CAN/ISO8 and CAN/K-ISO8 models work in the
same manner and only differ in their housing shape. CAN/ISO8 comes in the standard imc CANSAS
housing while CAN/K-ISO8 comes in the cassette housing and also uses 15-pin DSUB plugs.
Other cassette models are distinguished by special terminals on the front panel. The CAN/K-ISO8-BNC
model is for voltage measurement with BNC sockets. The CAN/ K-ISO8-2T and CAN/ K-ISO8-3T models
allow direct connection of thermoplugs having two or three pins.
The input channels of this module are arranged in two groups of four channels. All channels within a
group take the same connector type. Group 1 comprises Channels 1 through 4 and Group 2 comprises
Channels 5 through 8.
Otherwise, settings are made analogously to the imc CANSAS C12 module.
The maximum isolation voltage of ±100 V between the channels pertains to any two input pins marked
(+) and (-).Measurement with Pt100-units represents a special case:
All of a plug's connected Pt100 sensors are fed by a common reference current supply, so that there is no
potential isolation between the individual channels.
The cancellation of the potential isolation even affects both input plugs:
The Pt100-channels of the one plug (Plug1) cyclically assume the potential of the channels at Plug 2!
Also, the entire cabling for the Pt100 channels amounts to a dynamic capacitive load at Plug 2's inputs.
For this reason, mixed operation consisting of Pt100-measurements on one plug and current/voltage
measurement on the other is not advised.
Voltages in ranges >2 V are connected at the so-called Divider plug (CAN/DSUB-U4D).
For current measurements, a plug with shunt resistors is available (CAN/DSUB-I4).
For temperature measurement, the special Thermo-plug (CAN/DSUB-T4) is available. It comes with built-
in cold junction compensation.
A specially Pt100 plug is also available (CAN/DSUB-Pt100), which enables the direct connection of Pt100
resistors in 4-wire configuration and which comes with a built-in reference circuit.
485
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