Commissioning; Safety Information - Siemens 6ES7 972-4AA02-0XA0 User Manual

User´s Guide Power Rail Booster

6 Commissioning

6.1 Safety Information

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Use PRBs only as described in this User's Guide. Pay particular
attention to all warnings and safety-related information.
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Operate a PRB only with a safety extra-low voltage to IEC 950/EN
60 950/VDE 0805 of no more than +32 V (typ. +24 V). In
accordance with UL/CSA, the voltage source must be NEC Class
2-compliant.
Observe the electrical limit values when connecting voltage to the
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signalling contacts: 250 V AC / 30 V DC, rated operating current:
0,2A, rated operating current: 6W. These data only apply to
resistive loads. In the case of interconnection with inductive loads,
you must suppress interference using suitable protective circuits
(varistors or free wheeling diodes).
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Danger
Never connect the Power Rail Booster to mains voltage.
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Select a location for installation which fulfils the ambient conditions
and mechanical limit values shown in the technical specifications.
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Take steps to ensure that an installation error such as wire break,
cannot result in undefined states within the plant.
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Take the necessary measures and/or install suitable elements to
ensure that all interfaces are protected against lightning strikes
affecting the plant, whether indoors or outdoors.
Copyright © Siemens AG 2005 All rights reserved.
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6ES7 972-4AA02-0XA0
Version 12/2005
Page 27 of 49