KROHNE SMARTSENS PH 1590 EN - Manual (Page 35)

DESCRIPTION OF HART INTERFACE
7
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SMARTSENS PH 1590
www.krohne.com 11/2013 - 4002545902 - MA SMARTSENS PH 1590 R02 en
7.3.1 Point-to-Point connection - analogue / digital mode
Point-to-Point connection between the sensor and the HART ® Master.
The current output of the device is passive.
Figure 7-1: Point- to-Point connection
1 Primary master with e.g. PACTware TM FDT/DTM
2 FSK modem
3 HART
® signal
4 SD 200 W/R or SMARTMAC 200 W (optional)
5 Sensor
6 Secondary master with HART
® DD
7 Power supply for devices (slaves) with passive current output
8 Load ≥ 250 Ω (Ohm)
.book Page 35 Wednesday, October 30, 2013 11:35 AM