User manual

Page 38 915U-2 Wireless I/O
Page 38 User Manual
3.2.3 Input / Output Indications
Digital Inputs
LED‟s display the status of each of the eight DIO‟s when used as inputs. (If the LED is lit
then the input is on).
Digital Outputs
When the DIO‟s are used as outputs the LEDs will display the status of each of the
digital output (If the LED is lit then the output is on). The LED‟s also indicate if the output
is in a failsafe state by flashing to LKED at different rates. If the LED is mostly ON this
will indicate the Failsafe state on the „Digital Output Configuration Page‟ is ON and if the
LED is mostly OFF this will indicate the Failsafe state is configured OFF.
Analog Inputs
Two LEDs exist for each Differential analog input. The first LED (+) is used to indicate
the analogue input is reading a Current (mA), the second LED (-) indicates the input is
reading Voltage.
Each of the analog input LEDs will flash with increasing speed and intenseness
depending on the level of the input (4mA = slow/dim and 20mA= fast/bright)
For each of the single ended analog channels, the LED indicates when the input is
reading Current or Voltage by flashing the LED with the level of the input (4mA =
slow/dim and 20mA= fast/bright).
Analog Outputs
Each Analog output has an LED in series which will indicate the output current by
increasing/decreasing the intensity of the LED. (4mA = dim and 20mA= bright)
LED
Indicator
Condition
Meaning
D 1- 8
ORANGE
Digital input ON
D 1- 8
FLASHING ORANGE -
Mostly On
Update Failure - Failsafe state
On
D 1- 8
FLASHING ORANGE -
Mostly Off
Update Failure - Failsafe state
Off
AI 1 & 2 +
ORANGE
Analog input current indication
AI 1 & 2 –
ORANGE
Analog input voltage indication
AI 3 & 4
ORANGE
Analog input current or voltage
indication
AO1 & 2
ORANGE
Analog output current indication