EX500 Serial System | EX## - OME0008 |
5.How to operate EX500 - GDN1 ( DeviceNet )
5-1. Connection style
DeviceNet unit can be connected by T branch, Multi branch and Branch line branch.
Total extension length of trunk and stay is different depending on communication speed and thickness of communication cable.
EX500 series can be connected only by T branch.
Terminating resistance | Multi branch | T branch | Main | Terminating resistance | ||||||
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Multi branch
Branch line
Node
Node
Branch line
Branch line branch
Max. 6m
Node
Multi
branch
Node |
| Node |
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Node
Node
Branch line
Node
Node
・Wiring length
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| Communication speed ( k bit / sec. ) | |||
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| 125 | 250 | 500 | |
Max. length | Thick cable | 500m or less | 250m or less | 100m or less | |
of | Thin cable |
| 100m or less |
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Network |
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Total length of branch line | 156m or less | 78m or less | 39m or less | ||
Note : Max. length of a branch line is up to 6m. | |||||
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Terminating resistance | 121 ohms, 1/2W ( TURCK p / n = RSM57TR2 ) | ||||
・Cable specification
Item | Thick cable | Thin cable | |||
Signal | Power | Signal | Power | ||
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Conductor | 0.82mm2 | 1.65mm2 | 0.20mm2 | 0.33mm2 | |
section area |
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Color | Blue ( | Red ( 24VDC ), | Blue, White | Red, Black | |
White ( | Black ( 0VDC ) | ||||
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Impedance | 120 ohms±10% | - | 120 ohms±10% | - | |
Propagation |
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delay | 1.36ns / ft | - | 1.36ns / ft | - | |
( Maximum ) |
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Attenuation | 500kHz : 0.25dB / ｆｔ |
| 500kHz : 0.50dB / ｆｔ |
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rate | 125kHz : 0.13dB / ｆｔ | - | 125kHz : 0.29dB / ｆｔ | - | |
( Maximum ) | 1.00MHz : 0.40dB / ｆｔ |
| 1.00MHz : 0.70dB / ｆｔ |
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Conductor |
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resistance | 6.9 ohms / 1000ft | 3.6 ohms / 1000ft | 28 ohms / 1000ft | 17.5 ohms / 1000ft | |
( Maximum ) |
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| 1ft ≒ 0.3048m | |
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