This document summarizes the revision history of PCB part number 33-0024-Rx from the initial R0 revision in January 1999 through the current R6 revision. It describes the changes made at each revision level such as PCB layout changes, software changes, additions of memory and removal of features. It also provides information to help identify the correct wiring diagram for a given revision level.

1. YEAR AND DESCRIPTION OF REVISION CHANGES FOR:
PART NUMBER: 33-0024-Rx
DESCRIPTION: PCB, DIG. ECO-2 120V
R0 = (DATE:1/1999) FIRST PRODUCT
R1 = (DATE: 3/2001) PCB LAY OUT CHANGE. **( A new wiring diagram will be
required.) (Note: Soldiered on pressure switch and High limit sensor changed to
removable Pressure switch and Hi Limit sensor, receptacle pin numbers stay the
same, pin location on PCB changed.)
R2 = (DATE: 8/2001) REMOVED ERROR CODES.
R3 = (DATE: 11/2003) PCB LAY OUT CHANGE. **(A new wiring diagram will be
required.) (Note: Receptacles pin numbers changed and pin location on PCB
changed.)
R4 = (DATE: 3/2005) ADDED MEMORY AND REMOVED FIBER OPTIC
OPTION
R5 = (DATE: 5/2006) SOFTWARE CHANGE; DOES NOT AFFECT OPERATIONS
R6 = (DATE: 8/2006) ERROR CODES RETURNED, PCB LAY OUT CHANGE
(RoHS). **(A new wiring diagram will be required.) (Note: Receptacles pin numbers
changed and pin location on PCB changed.)
**Note: Information below is needed to identify the correct wiring diagram for the
system.
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2. current
PART NUMBER: 33-0024 revision
REVISION NUMBER: R0 R1 R2 R3 R4 R5 R6
DISCONTINUED ● ● ● ● ● ●
IN STOCK ●
LIMITED AVAILABILITY ***
REASON FOR NEW
L S L S S L/S
REV.*
NEW DIAGRAM
● ● ●
REQUIRED
DOCUMENTS INCLUDED ●
NEW PARTS REQUIRED **
WITH FUSES ● ● ● ● ● ● ●
WITH VDS LIGHTS N/A N/A N/A ● ● ● ●
UNIVERSAL KIT
●
INCLUDED
FIBER OPTIC OPTION ● ● ● ●
SEND TO FACTORY FOR
● ● ● ● ● ●
REPAIR OR UPGRADE
* NOTE: L = PCB LAYOUT CHANGE. S = SOFTWARE CHANGE L/S = LAYOUT AND SOFTWARE
CHANGE
** NOTE: WHEN REPLACING REVISON 0 WITH A NEWER REVISION, YOU REQUIRE NEW PARTS. (34-
0201D; SENSOR HIGH LIMIT, 34-0199C; HARNESS PRESSURE SWITCH)
*** NOTE: LIMITED AVAILABILITY PLEASE CONTACT FACTORY, MAY REQUIRE SPECIAL ORDER AND
LONGER LEAD TIMES.
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