Chapter 3
SC-2061 Board
© National Instruments Corporation
3-3
SC-206X Series User Manual
Specifications
The following sections list the specifications of the SC-2061 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 Output
Number of channels
Eight
Isolation
Working voltage
250 Vrms channel-to-channel
300 Vrms channel-to-ground
Note:
This product complies with IEC-1010 for Voltage Installation Category II Pollution
Degree 2.
Common-mode rejection
Typical
500 V/
µ
s
Minimum
100 V/
µ
s
Data rate
Up to maximum speed of host board (500 kHz)
Propagation delay
Typical (with 4.7 k
Ω
pullup to +5 VDC)
t
PLH
= 110 ns
t
PHL
= 45 ns
Output
Type
Open-collector
Compatibility
TTL-compatible
Fan-out
10 (using 4.7 k
Ω
pullup resistor at +5 VDC)
Voltage
Must pull up to +5 VDC only
Low level output current
15 mA (using 350
Ω
pullup resistor at +5 VDC)
Field connections
Three screw terminals per channel
Power Requirement (from Host Board or External Power Supply)
Power consumption (at +5 VDC)
Typical
21 mA
±
5% with all outputs low
77 mA
±
5% with all outputs high
Maximum
130 mA
Note:
The power specifications pertain to the power supply of the host computer when using
internal power or to the external supply connected at screw terminal J2 when using
external power.
