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Chapter 4
SC-2062 Board
This chapter describes the SC-2062 board in detail including function, compatibility,
specifications, mounting, and connection.
With the SC-2062 board, you can easily control many field digital signals with a computer
equipped with a National Instruments data acquisition board. With the appropriate SC-205X
Series board, the SC-2062 connects to the digital ports of any board in the SC-205X Series.
Therefore, the SC-2062 can provide relay output for the National Instruments data acquisition
boards for the Macintosh II, IBM PS/2 Micro Channel, and PC/XT/AT computers.
The SC-2062 electromechanical relay digital output board has eight single-pole, dual-throw
(SPDT) relays controlled by the eight digital lines connected to the SC-2062 board. Each of
these relays has a normally closed (NC) contact that is connected to the common (COM) contact
when the corresponding digital output line is low and a normally open (NO) contact that is
connected to the COM contact when the digital line is high. The contacts are break-before-make
so that all three contacts are never shorted. Working voltage isolation from contact-to-coil and
from contact-to-contact is a maximum of 250 Vrms.
Figure 4-l shows the parts locator diagram for the SC-2062 board.
External
Power
Screw
Terminal
Block
\
Switch
Sl
26-pin
Driver
. Relays
Screw
Blocks
Connector
Terminal
Figure 4- 1. SC-2062 Board Parts Locator Diagram
0 National Instruments Corporation
4-1
SC-206X Series User Manual
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