Selco M4200 - Programming by Switches; Rotary Switch - Operational Principle

M4200 - User manual
Revision: 07.03.2017 Page 13
Input reference
IMPORTANT: It is only recommended to use the programming example below if the alarm monitor is still in
factory default mode. If there is any possibility that the alarm monitor has been programmed before, please
refer to the section Factory default - dip switches on page 15.
Example
It is possible to set up input 1-8 individually to positive or negative reference. Default configuration is positive
reference via the terminal +REF OUT.
If negative reference is needed, please follow the example below regarding input 1, terminal 1:
1. Set rotary switch in position 1 (acknowledge LED change into red colour).
2. Set dip switch 1-2 to Off (GND reference).
3. Press Set button until Acknowledge LED shortly turns into green light.
4. Release Set button.
Now it is possible to connect input 1 as shown in Figure 9:
Figure 9. Wiring example, GND
If GND reference is needed on any other input channel, please select the input number on the rotary switch
and follow step 3 and 4 above.