KROHNE BW 25 EN - Manual (Page 23)

ELECTRICAL CONNECTIONS
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BW25
www.krohne.com 09/2010 - 4000432302 MA BW25 R05 en
Load for HART ® communication
The maximum load resistance is calculated as follows:
Configuration
The electronic M10 indicator can be configured using HART ® communication. DD (Device
Description) for AMS 6.x and PDM 5.2 as well as a DTM (Device Type Manager) are available for
configuration (go to download centre at www.krohne.com).
The current level can be transmitted using the integral HART ® communications. Two limit values
can be monitored.
INFORMATION!
The power supply has to be able to supply a minimum of 22 mA.
INFORMATION!
For HART
® communication a load of at least 230 ohm is required.
DANGER!
Use a twisted two-core cable to prevent electrical interference from impeding the DC output
signal.
In some cases a shielded cable may be necessary. The cable shield may only be earthed
(grounded) at one place (on the power supply unit).
MA_BW25_R05_en_432302_PRT.book Page 23 Tuesday, September 28, 2010 8:17 AM