DIP-switches

The signal type of the counter inputs can be configured with three DIP-switches. Their location is shown in and .

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:

New MRL-7 versions (3x4 switches)

DIP-switches
 

Orange dots show the default positions.

DIP-switch Position Function RS-485 (SW500) SW1 On SW2 On SW3 On SW4 On B with 3.0 kΩ to GND A with 150 Ω to B A with 1.1 kΩ to High B with 2.7 kΩ to GND RS-485 sleep (SW501) Off On High ≙ 5 V High ≙ 3 V Wn-Dir (SW321) SW1 On SW2 On SW3 SW4 Wn-Dir: pull-up Wn-Dir: pull-down not used not used Digi (SW320) SW1 On SW2 On SW3 On SW4 On Digi 1: pull-up Digi 1: pull-down Digi 2: pull-up Digi 2: pull-down

Input-Areas of digital channels

pull-down:	0 ... 0,6 V
pull-up:	2 ... 28 V

Usage of Wn-Dir

Wind-direction:	SW1 and SW2 to Off
Counter 2-b:	SW1 to On, SW2 to Off
Trigger:	SW1 to Off, SW2 to On

Usage of Digi

Counter 1 & 2-a:	SW1 to On, SW2 to Off, SW3 to On, SW4 to Off
Trigger 1 & 2:	SW1 to Off, SW2 to On, SW3 to Off, SW4 to On

Old MRL-7 versions (3x2 switches)

DIP-switches
 

DIP-switch	Position	Function
SW322	(Default)	Pin Wind-Dir on terminal X12 is configured as analog input to receive 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 output). 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 output).
		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 output).
		Pin Counter-1 on terminal X10 is configured as counter input with a pull-down resistor (connects to a sensor with an active output).