PSI System Controls and Diagnostics
A500 User Manual
A500_UM_090115 Page 5 of 61
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Safety Information
This unit is designed for compliance with harmonized electrical safety standard EN61010-
1:2000. It must be used in accordance with its specifications and operating instructions.
Operators of the unit are expected to be qualified personnel who are aware of electrical safety
issues. The customer’s Responsible Body, as defined in the standard, must ensure that operators
are provided with the appropriate equipment and training.
The unit is designed to support devices making measurements in
Measurement Category I
as
defined in the standard. It may also make such measurements directly, depending upon I/O
options that are installed.
The unit must not be operated unless correctly assembled in its case. Only Service Personnel, as
defined in EN61010-1, should attempt to work on the disassembled unit, and then only under
specific instruction from Pyramid Technical Consultants.
The unit is designed to operate from +24VDC power, with a maximum current requirement of
500mA. A suitably rated power supply module is available as an option. Users who make their
own power provision should ensure that the supply cannot source more than 2000mA.
A safety ground must be securely connected to the ground lug on the case.
Some of the following symbols may be displayed on the unit, and have the indicated meanings.