Front I/O Module - Lenovo ThinkSystem SR645 V3 User Manual

Rear components overview
Ethernet connectors
Figure 6. OCP module (two connectors, seen from the
rear)
The OCP module provides two or four extra Ethernet connectors for network connections.
By default, one of the Ethernet connectors on the OCP module can function as a management connector
using the share management capacity.
NMI button
Press this button to force a nonmaskable interrupt (NMI) to the processor. By this way, you can make the
operating system halt (such as Windows Blue Screen of Death) and take a memory dump. You might have to
use a pen or the end of a straightened paper clip to press the button.
PCIe slots
The PCIe slots are on the rear of the server and your server supports up to three PCIe slots on riser 1 and 2
assemblies.
Power supply units
The hot-swap redundant power supply helps you avoid significant interruption to the operation of the system
when a power supply fails. You can purchase a power supply option from Lenovo and install the power
supply to provide power redundancy without turning off the server.
On each power supply, there are three status LEDs near the power cord connector. For information about the
LEDs, see "Troubleshooting by system LEDs and diagnostics display" on page
USB 3.2 Gen1 (5 Gbps) connectors
The USB 3.2 Gen1 (5 Gbps) connectors are direct connect interfaces (DCIs) for debugging, which can be
used to attach a USB-compatible device, such as a USB keyboard, USB mouse, or USB storage device.
VGA connector
The VGA connectors on the front and rear of the server can be used to attach a high-performance monitor, a
direct-drive monitor, or other devices that use a VGA connector.
XCC system management port
The XCC system management port can be used to attach an Ethernet cable to manage the baseboard
management controller (BMC).

Front I/O module

The front I/O module of the server provides controls, connectors, and LEDs. The front I/O module varies by
model.
Figure 7. OCP module (four connectors, seen from the
rear)
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Chapter 2
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Server components
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