Gilderfluke&Co Quad D/A and Single Channel D/A - Manual (Page 6)

- TROUBLE SHOOTING -
If an analog movement is acting up and you suspect the D/A, the first thing to do is look at the LED
on each D/A channel. If it is not ramping up and down as smoothly as it should, then unplug the output.
If this fixes the problem, then the negative reference has most likely been attached to ground or some
other signal somewhere. If the LED is still uneven, then there is most likely one or more data lines feeding
the D/A with a bad connection. Check the cabling that feeds the data to the D/A. A Togglodyte or LED
Data Monitor can come in handy for this.
If the LED on the front doesn't change at all, even when the output cable has been disconnected,
then check that the fuse for that channel hasn't been blown in the animation system.
If the voltage measured on the output of a D/A changes appreciably when the output cable is dis-
connected, then there is a problem in the wires leading to whatever it is controlling, or in the controlled
device itself.
If the output randomly switches to a full on condition and stays there until you power the A/D down
(by powering down the whole system or just unplugging the D/A), this is a symptom of the output device
in the D/A receiving a electrical spike through the output cable. This is usually an indication of a problem
in the controlled device. If this problem persists, you may need to add spike protection to the D/A.
In most cases the D/A converters get the power they need from the J-6 data cables they are at-
tached to. In rare cases (as when they are attached at the end of long cables) the top end of the 0 to
10 volt swing may start to get lost. The symptom of this is the inability to get a full 10 VDC from the out-
puts. If your control signal doesn't need to go this high, then there is no problem. If it does then you will
need to add a supplemental power supply local to the D/A converter .
- OUTPUT SPECIFICATIONS -
The output capabilities of all D/A converters is as follows:
OUTPUT VOLTAGE: 0 TO 10 VDC
OUTPUT CURRENT: 0 TO 24 ma
OUTPUT DEVICE: LM324N
OUTPUT PROTECTION: OVERVOLTAGE/CURRENT PROTECTION
INHERENT TO LM324N
The capabilities of the servo motor outputs are as follows:
OUTPUT: OPEN COLLECTOR SWITCH TO GROUND
PULLUP: 4.7 K PULLUP TO + SERVO POWER SUPPLY
OUTPUT CURRENT: 16 ma MAXIMUM
OUTPUT/SERVO VOLTAGE: 5 VDC NOMINAL / 36 VDC MAXIMUM
G ILDERFLUKE & C O . ¥ 205 S OUTH F LOWER S T . ¥ B URBANK , C ALIF . 91502-2102 ¥ 818/840-9484 ¥ FAX 818/840-9485
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