imc CRONOS-PL/-SL/compact - Getting Started, Version 5 R 7 - 2018-06-28© 2018 imc Meßsysteme GmbH
Precautions for operation 13
2.1.1 Modularity of the imc CRONOS devices
The devices belonging to the imc CRONOScompact and the imc CRONOS-PL series are modular systems. A
variety of signal conditioners and digital I/O modules can be combined to a system.
As a matter of principle, modules may only be added or replaced by trained user or
imc service personnel!
The following constraints, however, apply:
·
Within the device, the necessary supply voltage is made available by a central power supply unit. A
maximum supply current is specified for each supply voltage. The allowable current load on the voltage
supply line is different for each module type. In addition, the power for the supply of an external
sensor (e.g. supply of a strain gauge measurement bridge) must be taken into consideration. The
supply power required by the power supply unit is tested at the factory. In the process, the power
consumption of the modules ordered is taken into account. Power reserves can be requested from
imc, if desired. If modules are subsequently added to a system which has already been shipped, it is
absolutely necessary to check whether enough reserve power is available! As a matter of principle,
only trained service personnel should install new system modules!
·
Individual modules are distinguished by "module addresses". These module addresses must be
configured prior to installing the module (e.g. DIP-switch, rotary switch, soldered jumpers). Previously
existing addresses of other modules must be taken into account. If the same module address appears
multiple times, conflicts will arise and the modules affected will either not be recognized by the device
software at all or only incorrectly. This generally leads to errors which are hard to identify!
·
A device can support only a maximum number of similar-type modules (e.g. maximally 16 digital-I/O
modules for type 2 devices (see Device Overview of the imc CRONOS manual), but only two digital-I/O
modules for Type 1 devices). If more than the maximum allowed number of similar modules are
inserted, the modules will not be supported by the device software. This usually leads to errors which
are hard to identify!
·
The addresses of the module DI16-DO8-ENC4 can’t be changed and are set to: DI4-16 (Addr. 1), DO8
(Addr. 0). That has to be considered, when addressing other digital modules (DI-16, DO-8, ENC-4). The
variant of this multiboard with an additional DAC-4 will need an additional address. A further
multiboard DI16(8)-DO8-ENC4(-DAC4) can be added without gap.
·
For safety reasons high voltage modules (HV4U, HV2U2I etc.) are not to be changed by a customer!
2.1.2 Exchanging modules
Changing modules is only permitted for users trained by imc or imc service and in agreement with
imc!
Devices having HV modules (HV-2U2I etc.) do not support exchanging of modules (device safety!).
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