Siemens Maxum II Service Manual page 27

DPM-Based Temperature Control
The Base3 DPM has two temperature-control channels. Two RTD inputs feed two comparator
circuits to drive two heater-control outputs. The heater-control outputs connect to inputs on
the PECM in most analyzers. The control path is shown below.
Figure 3-9
A mounting location and connector are provided for two Temperature Setpoint Modules. The
modules are installed on the left side (back) of the DPM, shown below. This same position is
used in the
RTD Temp Control Inputs
I 2 C
Temp Setpoint Module
Mounting Location
Figure 3-10 Temperature Setpoint Modules Installed on Left Side of Base3 DPM (Temperature Control Module shown,
Base3 DPM similar)
Maxum Edition II Detectors
Service Manual, May 2018, A5E42019847001
DPM
Temp
Compare
Setpoint
Modules
PECM
I 2 C
Airflow
Loss
Shutdown
Heater Control Path Using DPM
Temperature Control Module (TCM) .
Temp Setpoint Module
Mounting Screw Access
Status
LEDs
3.5 Base3 Detector Personality Module (DPM)
Analog
PWM
SSR Pair
Airflow Loss Temperature
Shutdown Control
AC
Line
SSRa SSRb
Flame Photometric Detector
Air Bath Oven
Temp Control,
Temp Limit,
Overtemp RTDs
High-Wattage
Heater
Digital
Air Pressure
Switch
Heater
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