Emerson AXP640-AC2-110VAC, Installation & Use Manual

Page: 144 / 190

Shelf Management Alarm Module
AXP640 Installation and Use (6806800M24E )
144
7.4 Functional Description
The SAM has a high-density 220 pin socket for the shelf management mezzanine (ShMM)
device and front-panel connectors for the serial console, Ethernet, and Telco alarm signals of
the mezzanine. The dual-IPMB interface from the mezzanine is connected to the dual IPMBs in
the backplane.
The SAM includes several on-board devices that enable different aspects of shelf management
based on the shelf management mezzanine. These facilities include I
2
C-based hardware
monitoring/control and GPIO expander devices.
7.4.1 IPMB Connectivity
The IPMB is a dual radial topology. Each IPMC in the shelf connects to both SAMs for a
redundant IPMB.
7.4.2 RS-232 Serial Interface
The SAM provides an RS-232 interface on the face plate connector using an RJ-45 connector.
The connector is routed to the serial port of the shelf manager mezzanine.The default baud
rate is 9600, 8, N, 1. Pin assignments for this connector are:
Table 7-1 RJ-45 Serial Port Connector
Pin Signal Direction
1 DSR Input
2 DCD Input
3 DTR Output
4 GND
5 RXD Input
6 TXD Output
7 CTS Input
8 RTS Output