Sc-2061 Board; Figure 3-1. Sc-2061 Board Parts Locator Diagram - National Instruments SC-206X Series User Manual

Chapter 3
SC-2061 Board
This chapter describes the SC-2061 board in detail including function, compatibility,
specifications, mounting, and connection.
With the SC-2061 optically isolated digital output board, you can easily control field digital
signals from a computer equipped with a National Instruments data acquisition board. With the
appropriate SC-205X Series board, the SC-2061 can have input isolation for the National
Instruments data acquisition boards for the Macintosh II, IBM PS/2 Micro Channel, and
PC/XT/AT computers.
The SC-2061 board has eight output channels at its screw terminals that are optically isolated
from the computer up to a working voltage of 300 Vrms. You can use these boards in many
situations, especially in industrial and other control environments where common mode voltages
are present. The SC-2061 accommodates output signals that switch at rates up to 500 kHz.
Figure 3-l shows the parts locator diagram for the SC-2061 board.
External Power Screw
- Switch Sl
rerminal Block -
/
26-pin Connector
Screw Terminal
Blocks
Figure 3- 1. SC-2061 Board Parts Locator Diagram
The 26-pin connector (Jl) attaches to the appropriate SC-205X Series board via a 26-pin
conductor cable. You can connect an external +5 V power supply to the external power screw
terminal block (J2) if required. To determine if an external +5 V supply is necessary, refer to
Znternal or External Power Selection in Chapter 5. Switch S 1 selects between internal and
external power. The buffer improves the logic levels of the inputs from the optocouplers to the
0 National Instruments Corporation
3-1
SC-206X Series User Manual