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AMX AXC-VAI2 User manual

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Reference Guide
AXC-VAI2 Voltage Output/Analog Input Card
Product Information
The AXC-VAI2 Voltage Input/Output Card provides 2 DC voltage outputs
and 2 DC voltage/potentiometer inputs. Typical applications include the
control of CCTV lenses (DC drive/pot), teleconferencing lenses (voltage ref-
erence), or small DC motors up to 60 mA current. It may be used whenever
a DC voltage ramp and/or an analog-to-digital conversion of DC voltage or
resistance is required. The AXC-VAI2 Card can be programmed to provide
a variable voltage ramp from -12 to +12 VDC in 256 discrete steps. Preset
positions or voltage levels can be stored for later recall and can be sent to
the 2 independent outputs as required. Overcurrent protection is provided
for each output. Input voltage levels of up to 28 VDC are accommodated.
Potentiometers are included for coarse and fine adjustment of range, level
centering, and input levels. The AMX AXC-EXT Extender Card is recom-
mended when on-site adjustment is desired.
Specifications
The table below lists the AXC-VAI2 specifications.
Connectors
The following table describes the AXC-VAI2 pinout connectors.
Channels
Levels
Programming
The AXC-VAI2 card uses the Axcess programming language. For more
information, refer to the Axcess Programming Language instruction man-
ual.
Use the following table to set ramp rates and presets.
Specifications
Indicators CR1 indicates voltage at Output 1 is changing.
CR2 indicates voltage at Output 2 is changing.
Jumpers:
Power-Up Selects either center of range or lowest level when system is
powered on.
Input Type (Channels 1 and 2) Selects either voltage or potentiometer
sense modes.
Switches Calibration switches and Coarse and Fine level pots simplify
output adjustment of DC range.
Pinout Connectors
Pinout Description
1GND
2 Output 1
3GND
4 Output 2
5GND
6 Input 1
7 Input 2
8+5VREF
Channels
Channel Function
1 While channel is on, ramps voltage channel 1 up (increase).
2 While channel in on, ramps voltage channel 2 up.
5 While channel is on, ramps voltage channel 1 down (decrease).
6 While channel is on, ramps voltage channel 2 down.
9 While channel is on, turns on AUX channel 3 voltage; when turned
off, sets AUX channel 5 voltage to 0.
10 When channel is on, voltage level for channel 1 is set to 255
(100%); when turned off, voltage level is set back to center.
11 When channel is on, voltage level for channel 1 is set to 0; when
turned off, voltage level is set back to center.
12 When channel is on, voltage level for channel 2 is set to 255
(100%); when turned off, voltage level is set back to center.
Channels (Cont.)
13 When channel is on, voltage level for channel 2 is set to 0; when
turned off, voltage level is set back to center.
14 When channel is on, voltage level for channel 1 is set to 192 (75%);
when turned off, voltage level is set back to center.
15 When channel is on, voltage level for channel 1 is set to 64 (25%);
when turned off, voltage level is set back to center.
16 When channel is on, voltage level for channel 2 is set to 192 (75%);
when turned off, voltage level is set back to center.
17 When channel is on, voltage level for channel 2 is set to 64 (25%);
when turned off, voltage level is set back to center.
Levels
Level Function
1 Voltage output channel 1 and joystick/slider control (0 - 255).
5 Voltage input channel 1 (0 - 255).
2 Voltage output channel 2 and joystick/slider control (0 - 255).
6 Voltage input channel 2 (0 - 255).
Send_Commands
PL
Ramps specified
channel from cur-
rent level.
Ramps from current level to a specified preset level or percent-
age at the current rate or optionally in a specified amount of
time.
Syntax:
’P<output channel 1-2>L<level 0-255 | 0-
100%> [T<time>]’
Variables:
time = 0 - 255 in tenth seconds
level = 0 is the lowest voltage and 255 (100%) is the highest
voltage
Examples:
’P2L50%’
Ramps channel 1 to 50% mid voltage level at the current ramp
rate.
’P2L255T30’
Ramps channel 2 to highest voltage level in 3 seconds.
PR
Sets the ramp
rate of the speci-
fied channel
where the time is
the time to ramp
the full range.
The full range being both down to up and up to down, or option-
ally just down to up or only up to down.
Syntax:
’P<output channel 1 - 2><time>[U|D]’
Variables:
time = 0 - 255 in tenth seconds
U = Down to up only
D = Up to down only
Examples:
’P1R50’
Sets ramp rate of channel 1 to 5 seconds full range from down
to up and up to down.
’P2R75U’
Sets ramp rate of channel 2 to 7.5 seconds full range from down
to up only.
’P2R50D’
Sets ramp rate of channel 2 to 5 seconds full range from up to
down only.
AMX Corporation reserves the right to alter specifications without notice at any time.
For full warranty information, refer to the AMX Instruction Manual(s) associated with your Product(s).
031-023-2515 1/02 ©2002 AMX Corporation. All rights reserved.
The AMX logo is a trademark of AMX Corporation. AMX reserves the right to alter specifications without notice at any time.
3000 research drive, richardson, TX 75082 USA • 469.624.8000 • 800.222.0193 • fax 469.624.7153 • technical support 800.932.6993
Calibration
The following steps illustrate setting voltage levels.
Setting Levels
1. Use voltmeter at the phoenix connector terminals to check card
voltage input.
2. Using the terminal emulator mode, establish communication with the
master card, and install card in the slot.
3. Use this syntax to check or set voltage parameters:
SEND_COMMAND x,’PyLz’ <CR>
x = device number (slot 1 - 16)
y = port number (1 - 2)
z = level desired (0 - 255) or (0 - 100%)
Using On-card Calibration Buttons
A cardframe with Master, server, and extender card are needed.
1. Load test card into extender card with component side out. LEDs
should be facing left.
2. Load extender card into any slot of AXM card cage.
3. Connect voltmeter to output port 1 at back of card cage. See
Pinout Connectors table for pin designations.
4. Set meter for Volts DC: 0 - 20 volt range.
5. Set mid-level or lowest level setting
Setting power-up to mid-level:
a. On the card, set the power-up jumper to "MID" mode.
b. Press and hold the "DN" (down) button.
c. Adjust the "Offset" trimpots to output zero (0) volts.
d. Press and hold the "UP" button.
e. Adjust "Range" trimpots for desired range.
f. Unplug, and then re-insert the card.
g. Adjust "Offset" trimpots to the desired MID level.
h. Repeat steps b - h until voltage values are within 5%.
Setting power-up to lowest level:
a. On the card, set the power-up jumper to "LO" mode.
b. Press and hold the ’DN’ (down) button.
c. Adjust the "Offset" trimpots to output zero (0) volts.
d. Press and hold the "UP" button.
e. Adjust "Range" trimpots for desire range.
f. Unplug, and then re-insert the card.
g. Adjust "Offset" trimpots to the desired LO level.
h. Repeat steps b - h until voltage values are within 5%.
6. Repeat "Setting power-up to mid-level" or "Setting power-up to low-
est level" steps for port 2.
Send_Commands (Cont.)
GL
Turns on the
specified output
channel at the
current speed
(voltage) until the
specified position.
The specified position is a preset position using an input chan-
nel as a reference.
Syntax:
’G<output channel 1-2>L<position>’
Variables:
position = 0 - 255; position 0 is one end of the potentiometer
(lowest voltage) and position 255 is the other end of the
potentiometer (highest voltage) with 128 the middle of the
range.
GS
Sets the current
speed for future
positional com-
mands.
Current speed is the output voltage.
Syntax:
’G<output channel 1-2>S<speed>’
Variables:
speed = 0 - 127; 0 is the slowest and 127 (default) is the
fastest.
GD
Sets the current
max position devi-
ation allowed for
future positional
commands.
Syntax:
’G<output channel 1-2>D<deviation>’
Variables:
deviation = 0 - 127; Deviation 0 is most accurate, but can
have some jitter, so the default is 2. The position can be
within + or - 2 from the specified position.
GAS
Temporarily slows
the speed to that
specified.
Slows when within the distance specified away from future pre-
set commands.
Syntax:
’G<output channel 1-2>A<distance>
S<speed>’
Variables:
distance = 0 - 127
speed = 0 - 127
LENS MANUAL Syntax:
CALL ’LENS MANUAL’ (<Panel>, <Up>, <Down>,
<Left>, <Right>, <Speed>, <Card>)
Variables:
Panel = Insert panel name or device number
Up, Down, Left, Right = Insert panel button number
Speed = Insert speed (0 - 127)
Card = Insert card name or variable
Example:
CALL ’LENS MANUAL’ (TOUCH,50,51,52,53,75,LENS[CAM])
The variable CAM keeps track of the selected camera card.
LENS PRESET Syntax:
CALL ’LENS PRESET’ (<Panel>, <Preset>,
<Store>, <Card>, <FLevel>, <ZLevel>)
Variables:
Panel = Insert panel name or device number
Preset = Insert desired preset number
Store = For playback, enter 0; to record, enter 1
Card = Insert card name or variable for selected camera
FLevel = Current focus position from input
ZLevel = Current zoom position from input
Example:
CALL ’LENS PRESET’
(TOUCH,12,0,LENS[CAM],FOC[CAM],ZOOM[CAM])