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Appendix E
DIP-switches
The counter inputs of the MRL-7 can be configured with three DIP-switches to receive different input
signals. The location of the DIP-switches is shown in
Figure 25: DIP-switches
To configure the counter inputs to receive signals from a sensor with either an open collector output
or a source output, set the DIP-switches according to the following table:
DIP-switch
Position
Function
SW322
(Default)
Pin
Wind-Dir
on terminal
X12
is configured as analog input to re-
ceive a wind direction signal (potentiometer), and pin
Counter-2b
on terminal
X19
is deactivated.
Pin
Counter-2b
on terminal
X19
is configured as counter input with
a pull-up resistor (connects to a sensor with an open-collector out-
put). Pin
Wind-Dir
on terminal
X12
is deactivated.
Pin
Counter-2b
on terminal
X19
is configured as counter input with
a pull-down resistor (connects to a sensor with an active output).
SW321
(Default)
Pin
Counter-2a
on terminal
X19
is configured as counter input with
a pull-up resistor (connects to a sensor with an open-collector out-
put).
Pin
Counter-2a
on terminal
X19
is configured as counter input with
a pull-down resistor (connects to a sensor with an active output).
SW320
(Default)
Pin
Counter-1
on terminal
X10
is configured as counter input with a
pull-up resistor (connects to a sensor with an open-collector out-
put).
Pin
Counter-1
on terminal
X10
is configured as counter input with a
pull-down resistor (connects to a sensor with an active output).