Woodward Vertex-Pro, Installation/Hardware Manual, Page: 21 / 112

Manual 26489V1 Vertex-Pro Motor-Driven Compressor Control
Woodward 11
3.2—Specification
The MicroNet is designed around a modular 6-slot chassis (block). Each block
consists of a premolded cage with a fan for cooling and a temperature switch for
high temperature detection. The chassis are cooled by forced air, and either a
module or a module blank must be installed in every slot to maintain correct air
flow. The fans run whenever power is applied to the system.
The MicroNet Plus 8-slot chassis is composed of two blocks with a motherboard
inserted in the back of the assembly to make connections between the fans,
switches, power supplies, and control modules. See Figure 4-6. The modules
use the VERSA module Eurocard (VME) bus standard for connector specification
and data transfer. Slot-to-slot logic and power connections are made through an
etched-circuit motherboard. I/O connections are made through cables from the
front of the boards to terminal blocks in the cabinet.
From a module connector standpoint, any I/O module can be installed in any of
the slots designated for I/O modules. However, when the application software is
designed, each module will be assigned to a specific slot and thereafter, the
software will expect that specific I/O module to always be in its designated slot.
FAN_3 FAN_4
FAN_2 FAN_1
I/O
A3
I/O
A4
I/O
A5
I/O
A6
I/O
A7
I/O
A2
2-Slot
Power
Supply
PS1
2-Slot
Power
Supply
PS2
A1
CP
U
1
A1
CP
U
2
A8
Figure 3-2—MicroNet Plus 8-Slot Chassis
CPU Slots (A1, A8)
Chassis slots A1 and A8 are designated as CPU compatible slots. These slots
provide extra functionality for monitoring fan status, chassis temperature status,
and power supply status information. The CPU slots also support operation of
Redundant CPU’s and the associated CPU Failover functions. The CPU slots are
identical except for slot address, thus a CPU can be installed in either one to
control the MicroNet system.

For simplex systems, CPU slot A8 can also be used as an I/O module slot.

Live Insertion and removal is supported for field reparability.

CPUs are located under different fan sets to improve reliability, airflow, and
temperature performance.

CPU slots use VME-64 connectors on the CPU module slots for improved
CPU HotSwap capabilities.