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Computer System
Electrical
Troubleshooting Guide
IRB-6400 M94A
2.4.8
Analog I/O Board DSQC 209
Designation
Label
Description
Test switch
+15:
+ supply
IN 1-4:
input signal
0:
0V
OUT 1-4:
output signal
- 15:
- supply
Test out
Measuring
The analog value of the signal
terminal
indicated by the test switch.
0V
Measuring
0V
terminal
F
Red
Turns off when the board
approves the initialization.
The analog I/O board, DSQC 209, converts analog
input signals to digital and vice versa. The signal level
equals 10V in and out with a resolution of 12 bits
including characters. The board is supplied with ±15V,
either internally or externally. The analog side of the
board is galvanically insulated from the system. The
first output, is the current output, which can drive or sink
a current of 20 mA. The board has a test input/output on
the front panel and a test switch which can be used to
test whether the board is working properly. By turning
the test switch to the position for measuring inputs, a
power supply can be connected to the test terminal
(protecting resistance should be used in the serial
channel) to test whether the inputs are working properly.
If
replaced
, there are no adjustments or procedures
required.
The I/O window can be used to check the status of the
inputs and outputs. Outputs can be controlled manually
and inputs can be read from the I/O window. Common
causes of errors are cable faults or faults in external
equipment. If none of the channels work, check that the
internal or external ±15V supply is OK and correctly
connected. If the red F-LED is lit, the board is probably
faulty or the system parameters are incorrect (i.e. the
board is not defined). Refer to Chapter 11 - Inputs &
Outputs for procedure.
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