Specifications

Power Entry and Control Module–Direct Current (PECM-DC), Continued
The PECM design provides control for the oven heaters. All oven
heaters for a modular oven (left for right) are powered by a single
harness. RTDs for temperature sense and over temperature sense for a
modular oven (left or right) are connected by a single harness as well.
Connector locations are shown in figure 2-16.
Heater Control for
Modular Ovens
The PECM-DC has six I
2
C bus connectors for internal bus distribution.
All six connectors (three on the right and three on the left are wired in
parallel for the same bus. The I
2
C bus originates from the CIM and is
connected to the PECM-DC (typically on the far left I
2
C connector of the
PECM-DC). All other connections for internal I
2
C bus control are
connected to the other connectors as needed. Refer to figure 2-16.
I
2
C Bus
The Solenoid Valves in the Maxum II Modular Oven are controlled via
the PECM-DC. Dedicated cable harnesses connect to the left, right, and
upper solenoids and are used to switch the solenoids upon command
from the CIM. Refer to figure 2-16 for connector locations and the
Solenoid Valve section of this chapter for more information on the
Solenoid Valve hardware.
Solenoid Valve Control
The EC for the Maxum II Modular Oven Configuration typically does not
require an air circulation fan. A fan power connection on the PECM-DC
is equipped for possible future use.
Air Circulation Fan
A5E31405710001 2-25