Siemens Maxum II Service Manual page 9

vapors or gases, even under fault conditions. Various circuits in the Maxum analyzer use this
form of protection, including the IS TCD.
Observe Intrinsic Safety practices
To preserve the intrinsically safe design protection of the IS TCD, certain measures are
required. Failure to adhere to all requirements for use of the IS TCD in the Maxum II could
violate the safety protections of the analyzer and cause equipment damage or serious injury.
See the Maxum II Explosion Protection Safety Standards Manual (A5E02220442001)
support.industry.siemens.com/cs/document/42017542/maxum-edition-ii%3A-explosion-
protection-safety-standards?lc=en-WW&pnid=17741) for more information on the safe use
of intrinsically safe circuitry in the Maxum II.
Connections
The connections to the IS TCD DPM are shown below.
DPM
Cage
DPM
Mounting
Screw
Position
ID Switch
Figure 2-2
Orange connectors to detectors: Each IS TCD DPM has two detector connectors. Each
connector can interface to two pairs of TCD elements (four total channels, 1 for reference and
3 for signal).
Maxum Edition II Detectors
Service Manual, May 2018, A5E42019847001
WARNING
Intrinsic Safety Ground
Connection Lugs
IS TCD DPM Connector Locations (IS TCD3 shown, IS TCD4 similar)
Thermal Conductivity Detector
2.1 Intrinsically Safe Thermal Conductivity DPM
2
I C Connector
Inputs from
Reference
Selector
Switches
DPM Mounting Rail
(https://
DPM
Mounting
Screw
Detector
9