Communication And Power Distribution - Siemens Maxum II Reference Manual

Electronic Compartment Component Descriptions and Maintenance Procedures
2.2 Power Entry and Control Module
Figure 2-6
2.2.3.3

Communication and Power Distribution

The 24V power supply connects to one of two parallel power connectors, TB1 and TB2 on the
PECM-CTL board. Another module can be powered from the other connector.
Each of the 7 I
A separate connector powers a 24V fan.
22
PECM
Temp
Compare
Setpoint
Modules
I 2 C
Airflow
Loss
Shutdown
PECM Heater Control Functions
C connectors also provides 24VDC power to the connected module.
2
Analog
PWM
SSR Pair
Airflow Loss Temperature
Shutdown Control
AC
Line
SSRa SSRb
Air Bath Oven
Temp Control,
Temp Limit,
Overtemp RTDs
High-Wattage
Heater
Digital
Air Pressure
Switch
Heater
Maxum II Reference Manual
Manual, 7/2017, 2000596-001