Operator`s manual

Dry Contacts (Models 300 & 600 only)

Contacts C1 and C2 allow you to connect the UPS to an external monitoring panel or to

trafc control equipment.

The factory default settings are given below, but you can program them to meet your

requirements (See Section 4.4, “Programming the Dry Contacts” or Section 4.6, “Novus

Micro Graphical User Interface”.

Figure 1.3.8 shows the contact’s layout.

C1: This contact is energized when Line power is unqualied and the UPS provides

backup battery power to the load(s). It is called the “On Battery” contact.

C2: This contact is energized when the battery drops below a preset voltage

level. It is called the “Low Battery” contact. You have the option to change the pre-

programmed level to match the batteries used and the actual operating conditions.

See Section 4.3, “Adjusting and Controlling the UPS, #35 Low Battery Warning

Voltage” for more details.

The dry contacts

have a maximum

rating of 1A at 250V.

Microprocessor

UPS

Interior

Normally

Closed (NC)

Normally

Open (NO)

Common (C)

Figure 1.3.8 – Dry Contact Layout (Standard for C1 & C2)

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Introduction

Doc# 017-221-B0 Rev 0307