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Product overview

BK3xx0 13Version: 4.3.0

2.3 BK35x0 - Technical data (optical fibers)

Fig.3: BK3500 and BK3520 - Bus Couplers with optical fiber connection for PROFIBUS DP

Technical data

Type BK3500 BK3520

Number of Bus Terminals 64 64 (255 with K-bus extension)

Digital peripheral signals max. 512 inputs/outputs max. 1020 inputs/outputs

Analog peripheral signals max. 64 inputs/outputs max. 64 inputs/outputs

Configuration possibility Via the KS2000 configuration software or the controller

Max. number of bytes

(inputs and outputs)

128bytes 128bytes

Baud rates up to max. 1.5Mbaud (manual setting) up to max. 12Mbaud (automatic detec-

tion)

Bus connection 1 x optical fiber with 2 HP Simplex con-

nectors

2 x optical fibers with 2 HP Simplex con-

nectors each

Power supply 24V

(-15% /+20%)

Input current 70mA + (total K-bus current)/4, 500mA, 500mA max.

Starting current 2.5 x continuous current

Recommended fuse maximum 10A

K-bus power supply up to 1750mA

Power contact voltage maximum 24 V

Power contact current load maximum 10A

Electrical isolation Power contact / supply / fieldbus

Dielectric strength 500V (power contact/ supply/ fieldbus)

Weight approx. 170g approx. 170g

Permissible ambient temperature (operation) 0°C … +55°C

Permissible ambient temperature (storage) -25°C … +85°C

Permissible relative humidity 95% (no condensation)

Vibration/shock resistance conforms to EN 60068-2-6 / EN 60068-2-27

EMC immunity / emission conforms to EN 61000-6-2 / EN 61000-6-4

Protection class IP20

Installation position variable

Approvals

CE, ATEX [}33], cULus

Beckhoff BK3120 User Manual

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