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January 16, 2006
From Microcomputer Systems, Inc.
MSI announces an 8-channel, 32-bit Quadrature Decoder/Counter Card with Index Inputs
The MSI-P404 is a 32-bit quadrature decoder/counter card with index inputs designed for monitoring quadrature encoder inputs used in determining motor shaft positions and rotations in machine control and robotic applications. The card can be supplied with 2, 4, 6 or 8 channels. Each channel provides a 32-bit binary up/down counter with selectable 1X, 2X or 4X decoding and latched count outputs using Agilent HCTL-2032 decoders. For each input channel, connector J1 provides for quadrature inputs with 10K pull-ups and surge suppressors for operation in harsh environments, as well as +5V and ground connections for powering of user's encoders. Channel index inputs from connector J2 also include 10K pull-ups and surge suppressors. Interrupt selection for IRQ3 thru IRQ9 are jumper selectable for managing counter roll-overs, if required. The unit is an 8-bit stackthrough PC/104 with I/O mapped 16-bit addressing for which the card base address is jumper selectable. A count reset to zero is provided for each individual channel. Operates from -40°C to +85°C. Requires +5V only at 2 mA/channel.