Startup and Maintenance
40
9.5 Switching on Power Supply
The input/output modules and their appertaining cable connectors are fixed with screws. The
24 VDC operation voltage has to be checked for correct polarity, level and ripple before it is
connected.
In case of reverse polarity a fuse protects the I/O module of damages.
9.6 Functional Testing
9.6.1 Preparing Functional Testing
For functional testing check the equipment of the control cabinet completely with help of the
label and/or documentation printout "I/O subrack". All free connectors of the input/output mod-
ules have to be connected to the allocated input/output racks, and the voltage connections of
the cable connectors to the allocated voltage distributors. All control elements (control devices)
must be released by the factory management or be driven without auxiliary power.
9.6.2 Testing in the Central Devices
The essential tests in the central devices of the H41q/H51q system are:
We recommend marking all required switch positions etc. in copies of the data sheets of the
respective control cabinet and keeping the copies in the pocket of the cabinet door. Should
modules have to be exchanged, the necessary information will thus be immediately available.
Note In this state the system is set up for testing if individual lines or a group
of lines are insulated against earth, but not if two lines are insulated
against each other. Otherwise there is a risk of damage.
The guideline for test voltages and insulating resistance is IEC/EN
61131-2 or DIN VDE 0160/EN 50178.
Central modules switch positions for bus station no. and transfer rate,
version of the operation system via display
Coprocessor module F 8621A operating system EPROM
switch positions for RS 485 interface
Communication modules switch positions for different operating modes for
modules F8627/F8627X and F8628/F8628X, see cor-
responding data sheet
I/O bus connection refer to the data sheet of the appertaining
assembly kit
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