Omron CRT1 - 10-2008 Operation Manual page 577

Precautions with Connecting Two-wire DC Sensors
Relation between OFF Current of Slave Unit with DC Inputs and
Sensor Leakage Current
≥ I
I
OFF leak
I : OFF current of a Slave Unit with DC Inputs
OUT
I : Sensor's leakage current
leak
Connect a bleeder resistor if the Sensor's leakage current is greater than the OFF current of a Slave Unit with
DC Inputs.
The bleeder resistor constant can be calculated using the following equation.
R ≤ (I × R
+ V )/(I
OFF IN F leak
2
Power W ≥ (V − V
)
CC R
554
− V
)
OFF
/R × 4 [allowable margin]
Appendix E