Siemens Maxum II Service Manual page 10

Thermal Conductivity Detector
2.1 Intrinsically Safe Thermal Conductivity DPM
Figure 2-3 Detail of Detector Connectors
Note
While the modules are similar, the detector connectors are not compatible.
● The IS TCD4 DPM CAN be used as a replacement for the IS TCD3 DPM with an adapter.
● The IS TCD3 DPM CANNOT be used as a replacement for the IS TCD4 DPM.
Intrinsic Safety Grounds: The intrinsically safe design of the IS TCD DPM requires two ground
connections to the chassis terminated to two different terminals. The Maxum II is shipped with
these grounds connected correctly. See the Maxum II Explosion Protection Safety Standards
Manual (A5E02220442001)
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.
I C Bus Connection: The white connector on the reverse side of the DPM connects to the I
2
Bus on the PECM.
Figure 2-4 IS TCD DPM Switches
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(https://support.industry.siemens.com/cs/document/42017542/
Reference Selector Switches:
Selects reference channel
Position ID Switch:
1 = Left
2 = Center
3 = Right
(Described in Location ID Switch)
Maxum Edition II Detectors
Service Manual, May 2018, A5E42019847001
C
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