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N o t e – ETC Unison ERn Rack-mount Control Enclosure User Manual

Page 7

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Introduction

3

URTO

7180A1410

Unison Ride Thru
Option Kit

The URTO kit provides power for one Paradigm architectural
control processor in the host enclosure for a limited time (minimum
of 12 seconds) during brief power outages or drop outs.

• If installed in an ERn4 enclosure, one URTO is required per

Paradigm ACP.

ERn-RPS 7180A1401

ERn Redundant
Power Supply

The ERn RPS provides an additional rack power supply that
powers the ERn enclosure if the primary rack power supply fails.

N o t e :

The redundant power supply (ERn-RPS) is not supported in ERn4 enclosures at

230 VAC. Instead the ERn4 at 230 VAC is shipped from the factory with a rack

power supply installed in the top (normal) position and in the lower option module

slot as standard.