Introduction
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Introduction
The PCI-7256 Latching Relay Actuator and Isolated D/I card is a basic
Digital I/O card for PCI bus computer in industrial applications.
This PCI-7256 provide 16 latching relay actuators and 16 opto-isolated digital
inputs. All relays are Form C type. They are very suitable for ON/OFF control
devices.
All of the digital input channels are identical non-polarity opto-isolated, each
of them can be switchable by using RC filter or non-RC filter. All channels are
isolated and suitable for collecting digital inputs in noisy environments. The
function of “Change-of-State” (COS) interrupt is provided. It means when any
of these digital inputs changes its state, an interrupt will be generated for
user to handle this external event.
Using latching relays, the PCI-7256 has the advantage of power saving. The
status of each latching relay output is reflected by a LED. When the latching
relay is in SET condition, its corresponding in-board LED will turn ON,
otherwise it is OFF.
Another useful feature is Board ID. It’s convenient for user to identify a
specified card by setting up a switch when user have two or more PCI-7256
cards in one system.
The I/O signals are via a 68-pin SCSI connector.
