Sink Input Characteristics
Original instructions
About us
Internal Wiring Diagram
Input Characteristics
WARNING
UNINTENDED EQUIPMENT OPERATION
Do not exceed any of the rated values in the characteristic table.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
The following table presents the sink input characteristics for 3 wire sensors:
Characteristic
Value
Number of inputs per channel
One input per channel
0 V is common between the two channels
Type
Input is sink current to 0 V with two dedicated terminals:
  • APU_OC for open collector source
  • APU_ST for supply tracking, TTL, or any signal conditioner 24 V
Voltage limits
-0.5...+30 Vdc
Active state voltage
APU_OC or APU_ST less than 2 V
Passive state voltage
APU_OC or APU_ST greater than 2.5 V
Built in line polarization
APU_ST terminal provides a 20 kΩ pull up to 8 V
APU_OC terminal provides a 2 kΩ pull up resistor to 8 V then 10 kΩ up to 24 V
APU_OC terminal provides a dynamic 10 Ω pull up to 8 V on rising edge detection. 35 kHz signal can be detected up to 300 m for sensor to module without external pull-up adaptation.
Minimum pulse detected
1 μs
Maximum frequency
500 kHz