34
Wiring
• Digital Inputs
– Changing Setups
– 4-Position Switch and relay used for signal isolation
– P 004 must be set to Multi Setup
4-position with a relay for Changing Setups
In the diagram above a 4-position switch is used to shift between 4 different program
setups. Notice the binary chart for setups # 1 through # 4. In order for the setup change to
work, parameter 004 must be set for “Multi Setup”. A DPDT (double-pole double-throw)
relay is used when position 4 is selected. This is another way, besides diodes seen in the
last example, to keep feedback power from terminals 32 and 33. To complete the circuit for
the 24Vdc (terminal 12) relay one side of the relay is attached to terminal 39 (common for
power).