Startup and Maintenance
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9 Startup and Maintenance
The tests and recommended measures for the startup, maintenance and fault detection are
briefly summarized.
To limit the scope of the documentation, the chapters concerned in this catalog and in the other
printouts of the HIMA system documentation are referred to.
9.1 Recommended Devices for Startup and Maintenance
– PC, for the work on site as portable computer (laptop). All projects of the system in their
current state and the HIMA system software should be on the hard disk,
– High resistance multimeter with resistance meter,
– Sensors to simulate analog signals.
9.2 Installing the System
The control cabinets are delivered with the modules plugged in and fixed with screws, and with
free connectors. They have been tested with these modules in the factory, so that the following
tests concentrate on the correct external installation.
9.3 Earthing the 24 VDC System Voltage
Refer to chapter 8.2.
9.4 Starting up the Control Cabinet
9.4.1 Testing All Inputs and Outputs for External Voltage
Impermissible external voltages (especially e.g. 230 VAC to earth or L-) can be measured with
a multimeter. We recommend checking each connection for impermissible external voltage.
9.4.2 Testing All Inputs and Outputs for Earth Faults
When testing the external cables for insulating resistance, short-circuits and wire breaks, the
cables must be disconnected at both ends in order to avoid damaging or destroying the mod-
ules with excessive voltage.
The testing for earth faults is carried out after the disconnection of the free connectors for the
sensors and control elements. The voltage connections of the free connectors on the potential
distributors must also be disconnected. The supplies of the sensors must be disconnected as
well as the negative pole must be separated at the control elements.
If the negative pole is set up for earthed operation, the earth connection must be interrupted
while testing for earth faults. This also applies for the earth connection of possibly existing
earth fault testing facilities.
Any connection can be tested to earth with a resistance meter or a special testing device.
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