EXPANSION CHASSIS
6-2
PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual
Revision 1.0, February 2015
6.2
LINK INDICATION-LED DEFINITION PCIE2-462
The PCIe2-462 has twenty-one green LEDs to indicate the link status of each slot and the cable. Each
slot has two, redundant, LED link status indicators. Eleven surface mount LEDs, one for each slot, and
one for the cable interface, are arranged in a group in the corner of the board near the power supply
connections.
Ten surface mount LEDs are place adjacent to each slot. The LEDs are placed just off-axis to the
botoom side of the installed board so as not be obscured by components on the board. The LEDs are
labeled J1 through J5 and J8 through J12.
A fully functional link (all laned up and operating at Gen2 rates) will have its LED ON solid. A link
running at Gen1 rates and/or using less PCIe lanes that available will indicate its status with a blinking
LED. The LEDs indicate link status as follows:
6.3
CONNECTORS, HEADERS AND JUMPERS
6.3.1
PCIe2-462 Jumpers and Headers
Most of the PCIe2-462 headers and jumpers use 0.025in square posts on 0.100in centers. Exceptions are
the fan connectors, the SSI Auxiliary Signal Connector and the Xilinx JTAG header. See the respective
sections for a description of the connector type.
6.3.2
J27 “ENCL SW” Chassis Intrusion Switch Connector
A normally open switch attaches here. NO polarity required on this connection. In normal operation, an
installed enclosure cover actuates the switch. If the cover is removed, the switch opens and the Monitor
Board Circuity can detect the change in state.
6.3.3
J26 “SSI” SSI Auxiliary Signal Connector
An Entry-level Electronics Bay Specification (SSI) compatible power supply with an Auxiliary Signal
connector would attach its Auxiliary Signal connector to J26. The pinout of J26 is as shown. Monitor
Board circuitry can communicate with the SSI power supply through the SSI Auxiliary connection. The
connector on the BP-462 is a 5-pin Molex 70545-0004 or equivalent.
OFF
Link is down
ON
Link is up, all lanes, Gen2 (5GT/s) rate.
BLINK: 0.5 seconds ON, 0.5 seconds OFF
Link is up, reduced lanes, Gen2 (5GT/s rate)
BLINK: 1.5 seconds ON, 0.5 seconds OFF
Link is up, all lanes, Gen1 (2.5GT/s rate).
BLINK: 0.5 seconds ON, 1.5 seconds OFF
Link is up, reduced lanes, Gen1 (2.5GT/s rate).
