Spider DSA User’s Manual
75
The Spider-80X and the Spider-81 family require an external power provided
through the wall-mount AC/DC adapter. The output of the DC adapter, which is
rated 15V/3A, should be connected to the DC connector on the rear of the front-
end device. They have an internal backup power supply that will provide at least 8
seconds of power to save data and shut down the system in case of a power loss.
This backup power source cannot run the system for any longer length of time.
Digital I/O
The Spider-81 has the 8-output and 8-input Digital I/O design. The Spider-81B
also have this same design but have the reduced number of input and output. The
12V power supply pin is also removed for the Spider-81B. The Spider-80X has the
interchangeable 4-output and 4-input Digital I/O design. This allows an input
flipping to an output, or an output flipping to an input.
If the system is composed of multiple Spider-81 modules, only the master module
can use the Digital I/O features. Each Spider-81 has 8 isolated digital inputs and 8
digital outputs, corresponding to the pins on the Digital I/O connector. A digital
input is detected when a low-high-low voltage change occurs, which triggers the
event actions set in the Event Action Rules section of the Test Configuration
window. Any device that can output square voltage pulses can communicate with
the data acquisition/controller system.
Pin Assignments
The DIO interface of the Spider-81/81B uses a DB-25 female connector. The pins
for OUT5~8, IN5~8, and +12V remain unused on Spider-81B hardware.
The DIO interface of the Spider-80X uses a DB-15 female connector.
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