ABB ScreenMaster RVG200 Manuel d'utilisation original

Service instruction SI/RandC/001-EN

ScreenMaster RVG200

Paperless recorder

Terminal block failures

Measurement made easy

1Introduction

There have been instances reported where some or all inputs

on an RVG200 analog input card have shown as failed

immediately after installation, with no apparent cause for the

failure. In rare cases, this can be attributed to a faulty analog

input card but the most common cause has been identified as

a problem affecting the connection strips within the terminal

block assembly.

The reason for potential failure is that during installation,

unscrewing the terminal connection, inserting the wire and

tightening the screw can cause the spring assembly inside the

terminal block to move, breaking its contact with the PCB.

2Action

3 Tools required

— Medium, flat-bladed screwdriver

4 Identifying failures

1. Isolate the recorder from the power supply.

Referring to Fig. 4.1 (overleaf),

2. Press down into recess Aand pull terminal cover B

away from the case.

Continued...

Action when fault reported Action at next service

Information only Recall instruments

WARNING – Bodily injury

Isolate all power supplies to the recorder before removing

the terminal cover.

NOTICE – Property damage

The recorder is vulnerable to electrostatic damage.

Wear an anti-static strap or dismantle the unit on an

anti-static workbench.

SI/RandC/001-EN 10.2015

3. Insert a flat-bladed screwdriver into each slot Cin turn (2

slots) to release the locking arm and pull terminal block D

away from the case.

4. Check the position of spring contacts Ewithin the

terminal block assembly.

The correct position for the contacts is as shown in Fig. 4.1

– each contact must be positioned a minimum of halfway

across the slot in which the module board fits.

5. If a contact is positioned incorrectly or is damaged, replace

the terminal block assembly.

6. Fit the terminal block.

7. Refit terminal cover B.

Fig. 4.1 Examining the terminal block contacts

Note

We reserve the right to make technical changes or modify the contents of this

document without prior notice. With regard to purchase orders, the agreed

particulars shall prevail. ABB does not accept any responsibility whatsoever for

potential errors or possible lack of information in this document.

We reserve all rights in this document and in the subject matter and illustrations

contained therein. Any reproduction, disclosure to third parties or utilization of its

contents in whole or in parts – is forbidden without prior written consent of ABB.

ABB Limited

Process Automation

Howard Road

St. Neots

Cambridgeshire PE19 8EU

Tel: +44 (0)1480 475321

Fax: +44 (0)1480 217948

ABB Inc.

Process Automation

125 E. County Line Road

Warminster

PA 18974

USA

Tel: +1 215 674 6000

Fax: +1 215 674 7183

www.abb.com

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