National Instruments SCC-DO01, Руководство пользователя

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© National Instruments Corporation 11 SCC-DO01 Isolated Digital Output Module User Guide
Theory of Operation
Setting the Power-Up State of the SCC-DO01
The switch for setting the power-up state of the SCC-DO01 is on the top of
the module. Switch it to
High or Low depending on whether you want the
output state to be high or low on power-up. The switch does not override
the output state as determined by the E Series DAQ device.
Status LED
The SCC-DO01 has a status LED that indicates when an input signal
registers a logic high or a logic low. The LED is located above the screw
terminals. If the LED is off, the input signal is registering a logic low on the
digital line.
Circuit Protection
Protection Against Spike Voltages
Two clamping diodes protect the SCC-DO01 against spike voltages caused
by inductive loads and long circuit wires. One diode is connected across
V
SS
and V
OUT
and the other diode is connected across V
OUT
and V
COM
.
14 —
15 —
16 —
17 —
18 —
19 —
20 —
Table 1. SCC-DO01 Pin Signal Connections (Continued)
Pin Number Signal
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