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80 Appendix B: Technical information
Auxiliary I/O status LEDs
Each of the 16 auxiliary I/O signals is associated with a status LED. Each of the
auxiliary input signals is associated with an input status LED; each of the auxiliary
output signals is associated with an output status LED.
Auxiliary output
status
OUTPUTS
LED
LED color
An auxiliary
green
output
status LED
off
An auxiliary
green
input status
LED
off
LED
s
Description
The corresponding auxiliary output signal is "turned on" (connection between
the AUX_OUT+ and AUX_OUT- pins is "closed" and allows current to flow).
The corresponding auxiliary output signal is "turned off" (connection between
the AUX_OUT+ and AUX_OUT- pins is "open" so current does not flow).
The sensor of the corresponding auxiliary input signal is detecting a "logical
high level". The voltage threshold is met across the AUX_IN+ and AUX_IN-
pins.
The sensor of the corresponding auxiliary input signal is detecting a "logical
low level". The voltage threshold is not met across the AUX_IN+ and
AUX_IN- pins.
Auxiliary input
status
LED
s
INPUTS
8
9 10
13 14 15
11
12
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