DIO24, User Manual
2. Physical Description
This section presents a physical description of the DIO24 and its features. Refer to Figure 2. The DIO24 is a simple
25-bit discrete I/O interface board. It contains a PCI based host connection and an RS485 external I/O interface. A
PECL version is also available.
Figure 2
An illustration of a PCI-DIO24.
J2
1
2
P1
1
RP7
RP6
RP5
RP1
1
1
1
1
1
1
1
RP4
RP3
RP2
2.1. Identification
This subsection gives details on how to identify the different versions of the DIO24.
2.1.1. PMC/PCI-DIO24
The base version of the board (no suffix after the DIO24 model number) includes RS485 transceivers. The
transceivers are the 25 small gray outlined squares in Figure 2 running down the center of the board. If the
transceivers have four unpopulated solder pads to their right, then the transceivers are RS485 style. This version of
the DIO24 has the following identification register values.
Table 1
Register level identification of the DIO24.
Register Value
Description
PCIIDR
0x908010B5
The lower 16-bits is the Vendor ID and identifies PLX Technology. The upper 16-
bits is the Device ID and identifies the chip is a PCI9080.
PCISVID
0x10B5
This identifies the PCISID as being assigned by PLX Technologies.
PCISID
0x2706
This identifies the board as a member of the DIO24 product series.
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General Standards Corporation, Phone: (256) 880-8787
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