Pinnacle-systems DR Manuale Utente Scaricare il pdf (Pagina 10)

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Introduction

problems from occurring simultaneously in both

redundant circuits.

• Force-guided relays allows dry relay contacts to

be monitored for contact welding and/or circuit

failure.

• Watchdog timers on both computers and both

safety relays assures that a system lock-up will

automatically drop out the safety relays.

• Through the use of shielded cables, chokes,

surge suppressers, and optically-coupled inputs,

immunity to EMI/RFI ﬁ elds is greatly increased.

• The MicroGuard DIN-rail was designed to meet

the European IEC 61496 standard parts 1 and 2

(part 2 requires use of optional 2 degree pylons),

CSA, UL 1998, UL491, UL991, OSHA, ANSI, and

RIA.

• Surface mount technology is used throughout for

increased reliability.

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Pinnacle-systems DR Manuale Utente Pagina 10