Features PCI-1753 :

• 96/192 TTL digital I/O lines
• Emulates mode 0 of 8255 PPI
• Buffered circuits for higher driving capacity than 8255
• Multiple-source interrupt handling
• Interrupt output pin for simultaneously triggering external
devices with the interrupt
• Output status read-back
• “Pattern match” and “Change of state” interrupt functions for
critical I/O monitoring
• Keeps I/O setting and digital output values when hot system
reset
• Supports dry contact and wet contact
• High-density 100-pin SCSI connector

Introduction PCI-1753 :

The PCI-1753 is a 96-bit digital I/O card for the PCI bus, which can be
extended to 192 digital I/O channels by connecting with its extension
board, PCI-1753E. The card emulates mode 0 of the 8255 PPI chip,
but the buffered circuits offer a higher driving capability than the 8255.
The 96 I/O lines are divided into twelve 8-bit I/O ports: A0, B0, C0, A1,
B1, C1, A2, B2, C2, A3, B3 and C3. Users can configure each port as
input or output via software.
Easy to Install: Plug and Play
The PCI-1753 uses a PCI controller to interface the card to the PCI bus.
The controller fully implements the PCI bus specification Rev 2.1. All
bus relative configurations, such as base address and interrupt
assignment, are automatically controlled by software.

Dry Contact Support for Digital Input

Each digital input channel of the PCI-1753/1753E accepts either 0 ~ 5
VDC wet contact or dry contact inputs. This dry contact capability allows
the channel to respond to changes in external circuitry (e.g., the closing
of a switch in the external circuitry) when no voltage is present in the
external circuit.
Reset Protection Fulfills the True Requirement of Industrial
Applications
When the system is hot reset (the power is not turned off), the
PCI-1753/1753E can either retain the value of the last I/O port settings
and outputs, or return to its default configuration, depending on the
jumper setting. This function protects the system from wrong operations
during unexpected system resets.

Interrupt Functions Ensure Faster System Response

Two lines of each port C (i.e., ports C0, C1, C2 and C3) are connected
to an interrupt circuit. The “Interrupt Control Register” of the
PCI-1753/PCI-1753E controls how these signals generate an interrupt.
Two interrupt request signals can be generated at the same time, and
then the software can process these two request signals by ISR. The
dual interrupt sources provide the card with more capability and flexibility.
The PCI-1753/1753E also provides “Pattern Match” interrupt function
for port A0. The card monitors the states of port A0 and compares
them with a pre-set pattern. When the received state matches the preset pattern, the PCI-1753/1753E generates an interrupt signal to the
system.
“Change of State” interrupt function is provided at port B0. When any
signal line of port B0 changes its state, the card generates an interrupt
to the system to handle this event.
These interrupt functions release the CPU from the burden of pulling all
I/O points, enabling a PC to handle more I/O points with higher
performance.

Cost Savings for Increasing the Number of Input/Output Lines

Industrial users are needing more and more digital I/O lines to transmit
data or to monitor/control outside devices. To meet this trend and to
satisfy user’s budget considerations, Advantech has developed an
extension board for the PCI-1753 called the PCI-1753E. The PCI1753E has almost the same structure as the PCI-1753, without the
interface controller. It shares PCI-1753’s interface controller through a
10-cm flat cable connection, so users can spend less money while
doubling the number of input/output lines.
Accessories for PCI-1753/1753E
The PCI-1753/1753E uses a 100-pin SCSI female connector. For easy
signal wiring, a PCI-1753 can be connected to two ADAM-3968s by a
100-pin to 2×68-pin SCSI cable (part number PCL-10268). The
ADAM-3968 allows easy access for wiring the individual pins of a
68-pin SCSI connector. An ADAM-3968/50 adapter board converts the
68-pin connector to two opto-22 compatible 50-pin box headers
for connecting the PCI-1753/1753E to daughterboards, such as
PCLD-782B and PCLD-785B.