Rockwell-automation 1788 NetLinx Media Checker Users Manual Manual de usuario descargar pdf (Pagina 34)

Calculating the Distance to a Short

1788-UM002A-US-P – April 2000

Table 13. DeviceNet and DH+/RIO Cable Resistances

Cable Type

Data Pair

(H, L)

Power Pair

(+,-) Shield

DeviceNet

Thick

0.0069 Ω/ft

0.0226 Ω/m

0.0032 Ω/ft

0.0105 Ω/m

0.00175 Ω/ft

0.00575 Ω/m

DeviceNet

Thin

0.028 Ω/ft

0.0918 Ω/m

0.01617 Ω/ft

0.053 Ω/m

0.0032 Ω/ft

0.0105 Ω/m

DeviceNet

KwikLink

0.00404 Ω/ft

0.01325 Ω/m

0.00404 Ω/ft

0.01325 Ω/m

DH+/RIO 0.00944 Ω/ft

0.031 Ω/m

NA 0.0041Ω/ft

0.0135 Ω/m

Table 14. ControlNet Cable Resistances

Cable Type Center

Conductor

Shield

ControlNet RG6

0.028 Ω/ft

0.0918 Ω/m

0.0036 Ω/ft

0.0118 Ω/m

ControlNet RG6F

0.0099 Ω/ft

0.0325 Ω/m

0.0029 Ω/ft

0.0095 Ω/m

ControlNet DS3/4

0.0255 Ω/ft

0.0836 Ω/m

0.0032 Ω/ft

0.0105 Ω/m

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 43 44

Safety Information 2
Getting Acquainted 4
Audible Signal (Beeper) 6
Low Battery Indication 7
Battery Save Mode 7
Cable ID Unit 7
Selecting a Cable Type 8
1788-UM002A-US-P – April 2000 10
Key to Twisted Pair Displays 12
The Test Function (TEST) 13
Coaxial Cable Test Results 21
0Ω SHORT 23
0.5Ω SHORT 23
Near End 24
Setup Selections 35
Maintenance 36
Performing a Self-Test 38
Parts and Accessories 40
Specifications 41
Meets AS/NZS 2064 44

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