DESIGN CHANGES
Beckwith Electric maintains a systen whereby our customers
can
be aware
of
design changes in any of our
units. Full documentation on any unit is kept on file by Model Number, Serial Number and, with our
microprocessor-based relays, by Software Versi�
All units have a Model Number. consisting of a letter and four numbers. CDmplex changes are recorded by
adding a suffix letter. '!he rUle is that it must be possible to use any later version as a replacement
for an earlier version.
The opy;:osite may not be true because
of
features added. If later units are
nQt
interchangeatle for older units, a change in the Model Number is made.
Some Simple changes are recorded by Serial Numbers. for example. changes in the detailed rating or
manufacturer of a component where either the new or old (:art will perform properly.
In addition, changes in Software Versions are recorded by Software Version numbers (for example
DO002V02 .00)
•
The follOWing describes the changes that have taken place on the
PRIDE
Units.
I . M-0290 , SERIAL NUMBERS 0
0
0
1
TO
0009
These units were originally supplied with Software Version DO001V01� This version is not compatible
with the Field Adjustment Unit M-0297/M-0397. In order to use the Field Adjustment Unit, the M-0290
relays must be updated. Return the PRIDE to Beckwith Electric for modification if you wish to use the
Field Adjustment Uni�
II. M-0290, SERIAL NUMBERS 0010
TO
0048,
EXCLUDIRG
0034, 0 0 42 , 0 0 43
ABO
0044
Relays in this group were originally supplied with software versicn DOOOlVOl.xx.
'Ibis software carmot
be used with the Field Adjustment Unit. This version does
JlQt
incoqX'lrate all the features described
in this book. The unit can be returned to the factory for a modification. Part of the modification
will include updating the scftware for use with the Field Adjustment Uni�
I I I .
M-0290A
These units were supplied with Software Version DOOOIV02.XX. These units may be used with the Field
Adjustment Unit M-02971M-0397 with the M-0397 software version number DO005VOO.xx. This combination
will inco[p::lrate most featUres described in this manual. If any of the later software features (those
incorporated in the M-0290B or M-029OC) are desired, a software update can be ordered.
IV.
M-0290B
The internal grounding on these units was changed to separate signal and power grounds for improved
accuracy of the frequency and voltage measuremen�
V.
M-0290B SERIAL NUMBERS
0042 , 0051 ,
0079 , 0 0 8 4 , 0105
ABO UP
Units with these serial numbers are supplied with a larger terminal block which is mounted vertically
on the rear of the
PRIDE
when the Semiflush Mounting Option is ordered (see Figure 9).
-39-
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