Applicable Specifications About This Book
16 3BSE 027 941 R301
Applicable Specifications
This product meets the requirements specified in EMC Directive 89/336/EEC and in Low Volt-
age Directive 72/23/EEC.
EUROPEAN UNION DIRECTIVE COMPLIANCE
Units mentioned in this document for which the product is marked with the
logo comply with the electromagnetic compatibility directive 89/336/EEC and
the low-voltage directive 73/23/EEC. See Appendix D, Directive Considerations.
UL LISTING
Units mentioned in this document are UL listed if the product is marked with the UL
logo.
indicates UL approval for the USA, and for both Canada and
the USA. The logo indicates UL approval for Canada only.
RAM Random Access Memory, normally a read/write memory
of random access type is assumed.
RCU Redundancy Control Unit.
RCU Link RCU Link Cable transfers data between Primary and
Back-up CPU. The two CPUs are connected to the RCU
Link Cable. An RCU Link Terminator is used on the RCU
Link Connector in single CPU configuration.
Redundancy The existence of more than one capability of an item
(system, equipment or component) to perform its
intended function.
Remote I/O Input/Output units connected to a controller via a
fieldbus.
SELV Safety Extra Low Voltage (power supply).
Table 1. Terminology (Continued)
Term/Acronym Description
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