1. Basic
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2. Sensors, Switches, Valves, Contactors, Drives etc.
Typical Automation System
Controller
PLC / PC
Field Devices
Sensors, Switches, Valves, Contactors, Drives etc.
Traditional
Installation
Dupline (or other Fieldbus)
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3. Reduction in maintenance cost Increased flexibility
General Fieldbus Advantages
Reduced Installation Cost
Reduced Cable Cost
Reduction in maintenance cost
Increased flexibility
Capacity for more signals
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4. Basic components: The twisted pair
Signal
Common
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5. Basic Components: The Channel Generator
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6. Basic Components: The Transmitter
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7. Basic Components: The Receiver
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8. I/O Addresses: A1, A2, A3 .. A8, B1, B2 .. P7, P8
Dupline Addressing Scheme
Channels:
I/O Addresses: A1, A2, A3 .. A8, B1, B2 .. P7, P8
Groups: A ... P
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9. Dupline Address Coding Device: GAP1605
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10. Dupline used for wire replacement
FMK 8
Channel Generator A1 A2 A4
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11. n-Remote Transmitters have Effect on One Central Receiver
Channel Generator 64 A1 A5
Transmitter A1 A5
Transmitter
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12. A Central Transmitter has Effect on n-Remote Receivers
Channel Generator 64
Receiver A1 A5 A1 A5
Receiver
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13. Dupline Standard Housings
Carlo Gavazzi
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14. Contact /NPN Transistor Voltage Different output Types Relay
Dupline Digital I/O-modules
Different input Types
Contact /NPN Transistor
Voltage
Different output Types
Relay
NPN Transistor
PNP Transistor
Different number of I/O’s
H-Housings, D-Housings and Open PCB
Different supply voltages
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15. Dupline Test Unit: GTU8
Monitoring of Channel Status’ in a Selected Channel Group
MODE: DIGITAL
1 GROUP
Dupline
Test Unit
GTU 8 A
Display of Channel-
Status’ 1 3 7 8
Mode
Enter
Select Channel-
Group 7 8
Force Channels to ON
(monostable) 4 5 6 1 2 3
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16. Dupline has free Topology
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17. Recommended min. cross sections Long distance: 1.5mm2
Dupline Cables
Single (twisted) pair of wires
Shield not required
Recommended min. cross sections
Long distance: 1.5mm2
Medium distance: mm2
Short distance: 0.35 mm2
Low capacitance for long distances
(preferably < 80 nF/km)
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18. Never connect Dupline Common to Ground
Dupline Installation
Never connect Dupline Common
to Ground
Treat the Dupline cable as a signal wire
Use DT01 termination unit for
distances > 1.5 km
Check correct wiring during
installation
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19. Splices must be water tight No leakage or connection between wires or
Cable Splicing / Isolation
Use soldering splices
Splices must be water tight
No leakage or connection between wires or
from wires to ground
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20. Rules for Dupline-powered Devices
The total current consumption must not exceed max current output of the channel-generator:
G : Max. 70 mA
G : Max. 130 mA
b) The total current consumption in the network multiplied by the cable loop resistance must not exceed 2 V
An example: 2 km 1.0 sq.mm twisted pair is used. G is used both with input and LED
The resistance of a 1.0 sq.mm. core is app. 20 Ohms/km.
With a wire length of 2 km the resistance per wire is 40 Ohms
With the 2 Dupline wires the total resistance is 2 x 40 ohms = 80 Ohms.
This means that the max total current is 2 V / 80 Ohms = 25 mA.
One G with LED function uses 1.2 mA
Max Number of G = 25 mA / 1.2 mA = 20 units
If the LED is not used the current per G is only 0.15 mA so in this case the result is:
Max number of G 's = 25 mA / 0.15 mA = 166 units.
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