KROHNE OPTISONIC 7300 EN - Manual (Page 111)

DESCRIPTION OF HART INTERFACE
9
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OPTISONIC 7300
www.krohne.com 09/2012 - 4001102303 - MA OPTISONIC 7300 R03 en
9.3.2 Multi-Drop connection (2-wire connection)
In the case of a multi-drop connection, up to 15 devices may be installed in parallel (this signal
converter and other HART
® devices).
The current outputs of the devices must be passive!
1 Primary Master
2 HART
® modem
3 HART ® signal
4 Other HART ® devices or this signal converter (see also 7)
5 Signal converter terminals A (C)
6 Signal converter terminals A- (C-)
7 Signal converter with address > 0 and passive current output, connection of max. 15 devices (slaves) with 4…20 mA
8 Secondary Master
9 Power supply
10 Load ≥ 250 Ω (Ohm)