Cpu Module - Emerson ControlWave Instruction Manual

1.4 CPU Module

CPU Module

Configurations
Number of RS-232
Ports
2 (COM1 & COM2)
3 (COM1, COM2, COM4)
CPU Backup
Battery
CPU Memory There are several different types of memory used on the CPU module:
Revised Aug-2015
ControlWave I/O Expansion Rack Instruction Manual
Note : The ControlWave I/O Expansion Rack CPU does not accept a
downloadable ControlWave project (software application), it
only holds I/O modules. A separate ControlWave Process
Automation Controller runs the ControlWave project which must
reference the I/O points in the ControlWave I/O Expansion Rack.
The CPU (central processing unit) module houses the CPU board, and if
present the secondary communications board (SCB). The CPU module
provides I/O monitor/control, memory, and communication functions.
The CPU board includes:
 Intel 386EX microprocessor running at 25 MHz
 2 RS-232 communication ports
 1 10/100baseT Ethernet port
 2 MB of battery backed Static RAM (SRAM)
 512 KB boot/downloader FLASH
 32 MB simultaneous read/write FLASH memory
 configuration DIP switches (described in Chapter 2)
 Port 80 display to show status codes
You can order the CPU module with the optional secondary
communication board (SCB) for additional communication ports. See
CPU Module Configurations.
The CPU module has two basic configurations, all of which have an
on-board backup battery and different combinations of
communications ports.
Table 1-1. CPU Module Configurations
Number of RS-485
Ports
0
1 (COM3)
The CPU module includes a 3.6V, 950 mA-hr lithium
This battery provides backup power for the real-time clock and the
system's Static RAM (SRAM).
Introduction
Number of Notes
Ethernet
Ports
1 (ETH1) No SCB.
3 (ETH1, For this port count, 1
ETH2, RS-232 (COM4), 1 RS-
ETH3) 485 (COM3), and 2
Ethernet ports (ETH2,
ETH3) reside on the
SCB.
½ AA
battery.
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