PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual
5-1
Revision 1.0, February 2015
CHAPTER 5
PCIE2-425/PCIE2-426 AND PCIE2-439/PCIE2-436
5.1
INTRODUCTION
Host Bus adapters (HBA) are the PCIe2-425 for x8 cables and the PCIe2-426 for x16 cables. They are
repeater based.
5.2
INSTALLATION IN HOST
The PCIe2-426 Host Bus Cable Adapter is installed in a host computer’s x16 Gen2 slot providing an
interface from the host to the x16 cable and, in turn, the expansion chassis. It can also be plugged into a
Gen1 slot, reducing performance.
5.3
PCIe2-426/425 LEDs
The bottom (or left) LED on the HBA front panel is the "Cable and Expasnion Chassis Detect" LED.
When the LED is ON, the HBA is detecting the cable and expansion chassis. If this LED is OFF, there
may be a problem with +3.3V power in the expansion chassis or the PCIe Expansion Cable is not
connected properly.
The top (or right) LED on the panel is "Expansion System Signal Detect". The LED is on when the
HBA detects a signal on Lanes 0-3 of the PCIe cable. The LED ON indicates normal operation. If the
LED is not on, there is something wrong with the cable or the expansion system is not operating
properly.
5.4
MECHANICAL
The PCIe2-426 and PCIe2-425 are low profile PCI Express add-in cards and are available with either a
standard height front panel or a low profile front panel. For the PCIe2-426, see Figure 5-2 for a
mechanical drawing of the card and Figure 5-1 for a front panel drawing. For PCIe2-425, see Figure 5-
6 for a mechanical drawing of the card and figure 5-5 for a front panel drawing.
Table 5-1. PCIe2-426 or PCIe2-425 Power Requirements
* The PCIe-426 and PCIe2-425 does not use +12V
5.5
PCIe2-436/439 UPSTREAM ADAPTER CARDS
The PCIe2-436 adapts the PCIe2-462 expansion backplane to a x16 cable. The PCIe2-439 adapts the
backplane to a x8 cable. The cards are low profile and can be shipped with a low profile end panel or a
standard height end panel. These cards are designed to only be used in "upstream" slots on Cyclone
Microsystems backplanes.
Voltage
Current Typical
Current Maximum
+3.3V
1.09 Amps
1.60 Amps
+12V
0 Amps
0 Amps
