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Relay PCA 04523 Addendum to E-Series Operator Manuals
1. INTRODUCTION
This addendum documents a recent upgrade to the relay card installed in some of the M100E,
M200E and M400E series analyzers. Specifically, a new relay PCA design, P/N 04523 replaces P/N
03955 and all of its versions in the following instruments.
It also corrects several errors related to the function of the relay PCA.
Table 1-1: List of Analyzers Using New Relay PCA P/N04523
RELAY PCA VERSION
1
PRODUCT FAMILY MODEL
045230100
045230200
M100E
M100EH
M101E
UV Fluorescence
M102E
M200E
M200EH
M200EM
Chemiluminescence
M201E
UV Absorption
Analyzers
M400E
1
See Sections 1.3.1 and 1.3.2
For those instruments, the information included in this addendum supersedes the information
related to the relay PCA that appears in the chapters on Theory of Operation
and Troubleshooting
& Repair of your M100E/M200E/M400E operator’s manual’s.
Because the operator’s manual for each model family of the E-Series instruments is slightly
different there is no direct correspondence between the sections and chapters of this addendum
and those of the manual.
1.1. What’s the Same
In most respects the electronic operation of the Relay PCA 04523 is the same as Relay PCA
03955.
Both are used by the CPU to operate various AC and DC heaters that control the
temperature of key components of the E-Series analyzers to such as sensor modules,
reaction cells and converters as well as certain optional components such as IZS
permeation tubes.
In both cases a set of configuration jumpers located on the relay card is used to configure
the heaters for 110 VAC, 60 Hz vs. 230 VAC, 50 Hz operation.
Both Relay cards, based on commands from the CPU received over the
I
2
C bus,
energize/de-energize the various solenoid valves used to control the sample gas path of
the analyzers (e.g. reference/measure valves; zero-span-cal valve options; IZS options;
etc.)
Both distribute the AC and DC power to the various electrically powered components and
assemblies for the instrument.
Both include a special watchdog circuit watches that will automatically shut of all valves as
well as turn off the UV Source(s) and all heaters should either the CPU cease issuing
commands or the I
2
C
bus fail. In both cases the sample pump will continue to run.
05118 Rev B3 1