moeller.net
Analogue inputs [t-head1-pg]
Depending upon the device two or three 0 to 10 V inputs are available.
The resolution is 10 Bit = 0 to 1 023.
Valid:
Caution!
Analogue signals are more sensitive to interferance than digital signals, therefore the signal cables should be carefully routed and connected. Inappropriate connections can lead to unwanted switching conditions.
- Use screened, twisted pair conductors, to stop interference of the analogue signals.
- With short conductor lengths earth the screen on both sides and fully. With a conductor length of approx. 30 m the earthing on both sides can lead to circulating currents between the earthing points and interference of the analogue signals. In this case only earth the conductor on one side.
- Don´t lay the signal conductor parallel to the power conductor.
- Inductive loads that must be switched by easy should be connected to a seperate power supply or a suppressor circuit should be used for motors and valves. Supplying loads such as motors, magnetic valves or contactors and easy from the same power supply can by switching lead to interference of the anologue input signal.
Top