Woodward MicroNet Simplex - Figure 4-6. Micronet Plus 8-Slot Chassis

Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 32
Features:
 A total of 8 CPU and I/O slots are available for use
 A new 2-slot wide, redundant, load sharing power supply is used
 Redundant Smart fans are used for early notification of fan-failure
 Chassis temperature switches are built into the motherboard and trip at
+65 °C
 Redundant, hot-swappable CPUs are supported
4.2.1—Specification
The MicroNet is designed around a modular 6-slot chassis (block). Each block consists of a pre-molded
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 VERSAmodule 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_2FAN_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
CPU1
A1
CPU2
A8
Figure 4-6. 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.
Released