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Chapter 2
Warnings: When connecting or disconnecting signal lines to the screw terminals, you must power off
the lines. Potential differences between the lines and the SC-2060 ground create a shock
hazard while connecting the lines.
Connections, including power signals to ground and vice versa, that exceed any of the
maximum input or output signal ratings on the SC-2060 board can result in damage to any
or all of the boards connected to the SC-206X Series, to the host computer, and to the SC-
2060 board. National Instruments is not liable for any damages resulting from incorrect
signal connections.
Specifications
The following sections list the specifications of the SC-2060 digital signal conditioning accessory
board. These ratings are typical at 25° C unless otherwise stated. The operating temperature range for
this board is 0° to 70° C.
Optically Isolated Digital Input
Number of channels
Isolation
Working voltage
Note:
This product complies with IEC-1010 for Voltage Installation Category II Pollution Degree 2.
Common-mode rejection
Typical
Minimum
Data rate
Propagation delay
Input
Compatibility
Input impedance
Maximum current
Field connections
© National Instruments Corporation
Eight
300 Vrms (minimum) channel-to-channel or
channel-to-ground
500 V/µs
100 V/µs
Up to maximum speed of host board (500 kHz)
t
= 75 ns (typical) with I
PLH
t
= 45 ns (typical) with I
PHL
Most TTL and CMOS logic
300 Ω ± 10%, 0.25 W (maximum)
I
= 20 mA (maximum)
IL
Two screw terminals per channel
2-3
SC-2060 Board
= 7 mA
IL
= 7 mA
IL
SC-206X Series User Manual
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