Milnor 76028 CBW, Schematic/Electrical Parts

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How to Use Milnor
®
Electrical Schematic Diagrams
PELLERIN MILNOR CORPORATION
circuitry (S+=three-wire circuit) and establish the order in which the schematic occurs in the
manual (schematics are arranged in alpha-numeric order in the manual).
Whenever circuitry changes are significant enough to warrant publishing a new schematic
drawing, the new drawing number will be the same as the old except for the major revision
letter (A in the example).
2. Included in the drawing title are the class of control system, the title of this circuit, and the
circuit voltage.
3. Line numbers are provided along the bottom edge of the drawing. These permit service
personnel in the field and at the Milnor
®
factory to quickly relate circuit locations when
discussing troubleshooting over the phone. Page and line numbers are referenced on the
drawing as explained in items five and six below.
4. Relay contacts show the page and line number on which the relay coil may be found. This is
the type of cross referencing most frequently used in troubleshooting.
5. Relay coils show the page and line number on which its associated contacts are located.
6. Relay contacts and relay coils show the physical location of the relay.
7. The designation MTA applies to electronic circuit board connections. Typically, a control
system will contain several different types of circuit boards and one or more boards of each
type. A numerical suffix identifies the board type and a numerical prefix identifies which one
of several boards of a given type is being depicted. For example, the designation 1MTA5
identifies this as the first I/O board (8 output, 16 input board) in the control system. As shown
on the drawing, a pin number follows the board number, separated by a dash. Thus, 1MTA5-
9 is pin 9 on this board. The numerical designations for board types vary from one control
system to another. Some of the board types commonly encountered on the Mark V and Mark
VI washer-extractor control and their designations are as follows:
• MTM1-MTM8 = Mother board
• MTA1-MTA5 = 8 output, 16 input (8/16) boards
• MTA11-MTA14 = 24 output boards
• MTA30-MTA40 = processor boards
• MTA41-MTA43 = digital to analog (D/A) boards
• MTA51-MTA55 = analog to digital (A/D) boards
• MTA81-MTA85 = balance A-D board
The complete listing of the boards utilized in a given control system can be found in the
component list for that system.
8. Wire numbers, as described earlier in this section, are shown at appropriate locations on the
schematic drawing.
9. Where diamond symbols appear at the end of a conductor, these are match points for
continuing the schematic on another drawing. The page and line number that continues the
circuit is printed adjacent to the diamond symbol. Where more than one match point appears
on the referenced page, match diamonds containing corresponding letters.
— End of BIUUUK01 —
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