Danfoss PLUS+1 Series

Each PLUS+1 hardware module has input or output pins that support multiple functions. Pins that
support multiple input or output types are user-configurable using PLUS+1 GUIDE software. Refer to
controller data sheets for the input/output (I/O) content of individual modules.
Inputs
Input Types
•
Digital (DIN)
•
Digital or Analog (DIN/AIN)
•
Analog or Temperature or Rheostat (AIN/Temp/Rheo)
•
Multifunction: Digital or Analog or Frequency (DIN/AIN/FreqIN)
•
Multifunction: Digital or Analog or Frequency or Rheostat (DIN/AIN/FreqIN/Rheo)
•
Fixed Range Analog or CAN shield (AIN/CAN shield)
•
Digital or Analog or Current (DIN/AIN/4-20 mA IN)
Each PLUS+1 Module input pin supports one of the above functional types. For pins with multiple
functions, input configurations are user programmable using PLUS+1 GUIDE templates.
Digital (DIN)
Digital inputs connected to PLUS+1 dedicated digital input pins are debounced in software. Digital input
debounce is defined as an input being in a given state for three samples before a state change is
reported. The sample time is a function of application loop time.
Multifunction pins that are configured to be DIN are subject to the same update rates as the analog input
function for that pin. Debounce is not used, as hysteresis is built into the function. The time to recognize
a transition is dependent on the timing of the switch activation and the sample rate.
General
Description Comment
Response to input below minimum voltage Non-damaging, non-latching; reading saturates to the low limit.
Response to input above maximum voltage Non-damaging, non-latching; reading saturates to the high limit.
Response to input open Pin configuration dependent:
No pull up/ no pull down = floating
Pull up to 5 Vdc = 5 Vdc
Pull down = 0 Vdc
Pull up/ pull down = 2.5 Vdc
Voltage working ranges Programmable (see specific data sheets for ranges).
Specifications
Description Units Minimum Maximum Comment
Allowed voltage at pin Vdc 0 36* Modules will survive with full
functionality if input voltage does not
exceed 36 Vdc.
* MC050-055/05B input voltage
maximum is limited to 16 Vdc.
Rising voltage threshold Vdc 2.80 4.15 A digital input is guaranteed to be read
as high if the voltage is greater than
4.15 Vdc.
Technical Information PLUS+1® Controller Family
Inputs/Outputs Types and Specifications
8 520L0719 • Rev PB • Feb 2014