Siemens Maxum II - PECM Functions; AC Input and Distribution

2.2.3 PECM Functions
2.2.3.1 AC Input and Distribution
AC mains power is wired to TB1 and TB2. TB10 is an optional connection for an uninterruptable
power supply for the 24 V power supply output, as shown in the diagram below.
Note
The power switching circuit is designed for either 115 VAC or 230 VAC. For safety reasons,
the PECM is not designed to convert DC to AC. Attempted operation from a DC source will
damage or destroy the PECM. To generate and control 115 VAC from a DC voltage system,
the customer must use components external to the PECM.
*TB10 parallel-connected
to TB1 if UPS is not used
H
ot
F5 6A
H N
TB10*
TB9
Low Wattage
Heater Relays 1- 5
1
2
3
1 4
Air Bath Heater Power
Hot
Holder
Hot
AC Chassis
Ground
F1
16A
ABH2
F2
16A
ABH1
Medium Wattage
Heater Relays
Hot
3
F4 10A
L 2
N 2
H N G
1
2
1
2
3A
Holder
H N G
TB1 TB2
L 1
N 1
Hot
Filtered AC
F3
J1
H
G
N
1
3
2
1
2
3
AC Filter Plug
(for 24V supply)
Holder
Figure 2-5 PECM AC Power Distribution
Electronic Compartment Component Descriptions and Maintenance Procedures
2.2 Power Entry and Control Module
Maxum II Reference Manual
20 Manual, 7/2017, 2000596-001