Operator Manual

748223-K June 2002

Model 7003M

2-6 RELAY CONTACTS FOR ALARMS OR ON/OFF-CONTROLS

NOTE:

Whenever "Alarm" is used, it refers to either alarm or ON/OFF Control, depending on how the relays are connected and configured by the customer.

Ratings

Two sets of alarm relay contacts are provided for actuation of customer- supplied alarm and/or ON/OFF-Control functions. (see Section 1-6 specifications on page 1-4).

Power Failure

Removal of AC power from the analyzer, as in a power failure, removes power from both relay coils. The Model 7003M should operate on a different AC power source than the Alarm relay contacts.

Radio Frequency Interference (RFI)

If alarm contacts are connected to any device that causes radio frequency interference (RFI), an arc suppressor (PN 858728) should be used to minimize RFI.

Connecting Devices to Relay Contacts

WARNING

RELAY CONTACTS

Relay contacts wired to separate power source must be disconnected before servicing.

Connect alarm or ON/OFF-Control devices to the relay contacts as follows:

1.Disconnect power; remove rear cover of analyzer.

2.Connect leads from the external alarm or ON/OFF Control system (see Figure 2-2 on page 2-3).

TB3-1 Alarm 1 Com

TB3-2 Alarm 1 NC

TB3-3 Alarm 1 NO

TB3-4 Alarm 2 Com

TB3-5 Alarm 2 NC

TB3-6 Alarm 2 NO

3.Connect other end of output cable to terminals of alarm device.

4.Replace the rear cover. Do not overtighten cover retaining screws, to avoid stripping the threads in the plastic case.

NOTE:

For installation in a Class I, Division 2 location, refer to the Specifications in the Preface section, and the approval label on the analyzer for Factory Mutual limitations on contact ratings.

2-8 Installation

Rosemount Analytical Inc. A Division of Emerson Process Management