PCD0
Safety-related information
Page 188
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SAIA-Burgess Controls Ltd.
(HB_PCD0 26 766_E2.DOC)
26/766 E2
18.3
Configuration, programming, installation, commissioning and operation
The automation system will in most cases be a part of a larger system in which machines or systems are
controlled. When configuring, installing and commissioning automation systems to control machines the machine
manufacturer and the user must observe the safety regulations as defined in the machinery directive 89/392/EEC. For
specific applications national accident prevention regulations such as VBG 4.0 will apply.
Safety-related components on the controlled machine must be designed such that they operate independently
from the control. Emergency stop components must be effective in all operating modes of the control. In an
emergency stop the power supply to all switching elements controlled by the control must be cut off. The power
supply can be cut off using a safety relay.
Measures must be taken for restarting an interrupted control program following voltage dips or power failures.
Operating states should never cause danger, not even for a short time. In the event of danger the emergency stop
must be immediately triggered.
In order to prevent an open-circuit in the signal circuit causing non-controllable states in the control, the relevant
hardware and software safety precautions must be taken for I/O interfacing. Control elements and their assigned
control panel elements must be installed in a place where they are sufficiently protected against inadvertent use.
18.4
Maintenance and servicing
Measuring and testing on active devices must be carried out in accordance with the regulations and instructions
of the VBG 4.0 accident prevention regulation. The appropriate power tools must be used.
Repairs on control components must be carried out at repair shops authorized by SAIA-Burgess Controls.
Opening the components and repairs by unauthorized personnel may lead to personal injury or damage to property.
Always disconnect the device from the mains before opening it (either disconnect the mains plug or use the cut-
out switch).
Control modules may only be replaced when the power is switched off. Disassembly and assembly must be carried
out according to the directives for mechanical assembly.
Fuses may only be replaced with those types specified in Specifications.
Batteries may only be replaced with those types specified in Specifications. Batteries must always be disposed as
hazardous waste.
18.5
High voltage
When the cabinet is opened or the housing removed from system
components certain parts of the automation system are exposed. These
parts may be subject to dangerous high voltages.
The user must prevent any unauthorized and incorrect access to the system (for example, by ensuring that the
cabinet is locked).
Personnel must be familiar with all sources of danger and measures for commissioning and servicing the system in
line with the instructions given in this manual.
