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AT303

PROFIBUS-DP Active Terminator


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The AT303 is an active terminator developed to increase the PROFIBUS-DP network availability and facilitate accessing any node on the PROFIBUS-DP bus without putting the network in an intermittent condition. This way, any network slave can be switched off, removed or replaced without harming the communication, especially when the terminators are enabled on the network end slaves.
 
The AT303 terminator can be mounted inside the panels with DIN rail or even on the field in boxes.
 

Main features

  • 24Vdc insulated power supply;
  • Galvanic insulation;
  • Speeds from 9.6 kbits/s to 12 Mbits/s;
  • LED for power supply indication;
  • One PROFIBUS DP frontal DB9 connector;
  • One connector PROFIBUS DP terminal block;

 

Application

Removing the devices, which have terminators enabled or even on their faults, the Profibus network will lose the termination, generating intermittencies and communication failures.
 
Network without AT303 - terminator on the device
 
 
 
 
With the AT303, the Profibus network always has terminators enabled. This increases the network availability and also allows easy removal of devices without missing the termination, ensuring the communication integrity.
 
 
Profibus-DP network with active terminators
 
 
 

Technical Specifications:

POWER SUPPLY

Voltage

20 to 30 Vdc

Consumption

20 mA @ 24 Vdc

Insulation

Galvanic

Wiring

Up to 2.5mm² cable connector fixed with screws

 

FUNCTION SPECIFICATIONS

Communication

All PROFIBUS RS-485: (DP, DP-V1, DP-V2, PROFIdrive, MPI, etc.)

Communication rates (kbps)

9.6; 19.2; 45.45; 93.75; 187.5; 500; 1500; 3000; 6000 and 12000

Cable

Type A – compliant with EN50170

Termination resistors

Compliant with Profibus EN50170 standart

Protection Degree

IP-20 (DIN EN 60529 VDE 0470)

 

ENVIRONMENT CONDITIONS

Operation

0 to 60 ºC

Humidity

Up to 90%

 

DIMENSIONS AND WEIGHT

Dimensions (Height x Width x Depth)

75.0 x 22.5 x 105.0

Weight

100 g

 

MOUNTING

Support

DIN35 rail (DIN EN 60715 TH35)

 
 


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