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10. R ELAY C ARDS
Chapter 10 describes the features of the Relay Card, one of the
I/O cards designed for the Smart Star embedded control system.
The Smart Star is a modular and expandable embedded control system whose configura-
tion of I/O, A/D Converter, D/A Converter, and Relay Cards can be tailored to a large
variety of demanding real-time control and data acquisition applications.
The typical Smart Star system consists of a rugged backplane with a power supply, a CPU
card, and one or more I/O cards. The CPU card plugs into a designated slot on the back-
plane chassis, which has seven additional slots available for I/O cards to be used in any
combination. A high-performance Rabbit 2000 microprocessor on the CPU card provides
fast data processing.
10.1 Relay Card Features
Two models of Relay Cards are available, as shown in Table 20.
Table 20. Smart Star Relay Cards
I/O Card
Relay
Model
SR9500
SR9510
Features
5 SPST relays and 1 SPDT relay, each protected
with onboard snubbers
8 SPDT relays (no snubbers)
The SR9500 Relay Cards are suitable for switching all kinds of loads up to 30 V DC at 1 A
or 48 V AC at 0.5 A. The SR9510 handles similar loads, but is restricted to noninductive
loads unless you add snubbers to the system that is interfacing with the Smart Star.
User ’s Manual
117
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