Hardware Description

The new chassis manager uses a completely new set of hardware compared to the older revisions. The design is based around the Lantronix XPort AR module, along with accompanying external hardware for interface to the node. The SDK for this device allows the implementation of custom code which is used to interface and understand CMC instructions.

Major Hardware Components

Lantronix XPort AR

The Xport AR is an embedded device server, produced by Lantronix. It runs off of the ​Evolution OS®, combined with the custom software written using the Xport AR SDK. The Xport AR acts as the 'brains' of the CM3, handling all the networking tasks, as well the link between the CMC instruction commands, and the physical interface to the node. It has the following basic features:

Architecture
CPU	Based on the DSTni-EX enhanced 16-bit, 120MHz x86 Architecture
Memory	1.25 MB RAM and 4 MB FLASH
Firmware	upgradeable via FTP,TFTP, Serial Ports, Internal Web Server
Diagnostics	Built in diagnostics and comprehensive statistics
Network Interface
Interface	Ethernet 10Base-T or 100Base-TX (Auto-Sensing)
Connector	RJ45
Layer 3 Protocols	TCP, UDP, IP, ARP, ICMP, SSH, SSL, XML, HTTP, PPP, PAP, CHAP, DNS, SMTP, RSS, DHCP, BOOTP, AutoIP, SNMP, FTP, TFTP, Telnet, CGI
Serial Interface
Interface	CMOS (Asynchronous, 5V Tolerant)
Data Rates	300 bps to 230,400 bps (selectable by 1bps increments)
Characters	7 or 8 data bits
Parity	Odd, even, none
Stop Bits	1 or 2
Control Signals	RTS, CTS, DSR, any PIO
Flow Control	XON/XOFF, RTS/CTS, User Selectable Characters

The GPIOs are used to control the solid state relays used to power the node on/off and reset the node, as well as monitor the 'hardware status', see the next section for details on this.

More information on the Xport AR can be found ​here

Voltage Monitor

The CM3 has a PC voltage monitoring chip installed, the

RS232 Level Shifter

Solid State Relays