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RELAY/DIGITAL I/O CARD PCI—48 INPUTS OR OUTPUTS
4. Technical Description
The Relay/Digital I/O Card PCI provides 48 channels of digital I/O configurable
as inputs or outputs. Use the channels for PC-based control and automation
including sensors, switches, satellite antenna control systems, video and audio
studio automation, security control systems, and other industrial automation
systems.
4.1 Pull-Ups
Nine or ten pin bussed resistor packs are installed to provide pull-ups to input
ports. These are installed on all ports. The pull-up resistor packs are rated 10 K
ohms.
Bussed
Resistor
RP4
RP5
RP6
4.2 Software
The Relay/Digital I/O Card PCI comes with the SeaI/O suite of Windows
2000, and Windows NT
applications program interface (API), allowing the developer to concentrate on
the details of the application as opposed to low-level driver development. Popular
development environments, including Visual C++, Visual Basic, and Delphi, are
supported for application development. SeaI/O includes a utility for configuring
the driver parameters under Windows, further simplifying installation.
4.3 Linux Users
The Relay/Digital I/O Card PCI ships with software for Linux, including a kernal-
mode driver, API, and the SeaIOTst diagnostic tool. The kernal-mode driver is
provided as a module, so future driver upgrades may be performed with minimal
(usually zero) downtime. The Linux API is identical to the Windows counterpart,
facilitating quick and easy ports of existing SeaI/O-aware applications to the Linux
operating system. All source code for the Linux software suite is provided under
the GNU Public License (GPL v2.0).
10
Corresponding
Port
Port A1
Port B1
Port C1
®
drivers. SeaI/O provides a consistent and straightforward
Bussed
Resistor
RP1
RP2
RP3
Corresponding
Port
Port A2
Port B2
Port C2
®
98, Me,
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