MT-30
Installation, Operation & Maintenance
06225-03H.doc
43 of 47
AeroVironment, Inc
Appendix IV: Analog Signal Control
Equipment Requirements:
•
MT30 system (06200-001/002)
•
Analog Signal Generator such as Analog Channel of Ni-DAQ PCI-MIO-16XE card, or
variable power supply (Linear supply recommended) with low ripple and noise (<+/-3 mV).
•
Isolation Amplifier with +/- 5 Vdc Output.
•
BNC cable with the following signal definition [(+) Center Conductor and (-) shell] to be
connected to the signal source.
Signal Specification:
•
Isolated Supply.
•
Absolute Maximum range +/- 5 Vdc.
•
Operating mode: Power / Current under manual or remote operation.
•
Minimum resolution 25 mVdc.
MT-30 Operation with Analog Signal Control
The Analog control signal enables the user to program / control the output current or power on
each channel of the MT-30 independently. To use this feature the user must first set the
Upper
and Lower
limits
(these limits will set the operation boundaries of the system which then could
be controlled by varying the Analog Signal input). Once the limits are established the user must
engage the desired channel into current or power mode either in Local or in remote, and can use
the Analog signal to control the output current or power. The Analog signal scales the output
current or power of the MT-30 based on the table listed below, also provided below is the
graphical representation in both current and power mode.
Current Mode
Voltage Level
Scaling Equation
4.5 V <= (Analog V) <= 5.0 V
Output Current
1
= Current
2
+ IUpper limit
0.5 V <= (Analog V) <= 4.5 V
Output Current = C IUpper limit *[((Analog V)-0.5) / 4]
-0.5 V <= (Analog V) <= 0.5 V
Output Current = Current
-4.5 V <= (Analog V) <= -0.5 V
Output Current = C ILower limit *[(|Analog V|)-0.5) / 4]
-4.5 V <= (Analog V) <= -5.0 V
Output Current = C ILower limit
1.
ILower limit <= Output Current =< IUpper limit
2.
Current commanded by the user via Front panel or ROS
Also see graph provided on page 45
