ABB ScreenMaster RVG200 Original operating manual
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.
Contact us
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
A
B
C
D
E
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.
Copyright© 2015 ABB
All rights reserved
ABB Limited
Process Automation
Howard Road
St. Neots
Cambridgeshire PE19 8EU
UK
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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