554
Precautions with Connecting Two-wire DC Sensors
Appendix E
Relation between OFF Current of Slave Unit with DC Inputs and
Sensor Leakage Current
I
OFF
≥
I
leak
I
OUT
:
OFF current of a Slave Unit with DC Inputs
I
leak
:
Sensor's leakage current
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
OFF
×
R
IN
+ V
F
)/(I
leak
−
V
OFF
)
Power W
≥
(V
CC
−
V
R
)
2
/R
×
4 [allowable margin]
Summary of Contents for CRT1 - 10-2008
Page 2: ...CRT1 Series CompoNet Slave Units and Repeater Unit Operation Manual Revised October 2008...
Page 3: ...iv...
Page 5: ...vi...
Page 9: ...x...
Page 15: ...xvi...
Page 23: ...xxiv Conformance to EC Directives 6...
Page 51: ...28 Slave Unit Models Section 1 2...
Page 123: ...100 Connecting External I O for Slave Units Section 3 6...
Page 365: ...342 Temperature Input Units Section 7 5...
Page 381: ...358 Expansion Unit Specifications Section 8 2...
Page 418: ...395 Repeater Unit Section 10 2 Dimensions 42 3 50 3 1 27 5 95 mm...
Page 419: ...396 Repeater Unit Section 10 2...
Page 424: ...401 CX Integrator Section 11 1...
Page 575: ...552 Current Consumption Summary Appendix D 552...
Page 581: ...558 Index...
Page 583: ...560 Revision History...