KROHNE OPTITEMP TT 51 EN - Manual (Page 25)

OPERATION
5
25
TT 51 SERIES
www.krohne.com 09/2010 - 4000754201 - MA TT 51 R01 en
5.1 HART ® networks
5.1.1 Point-to-point connection analog / digital mode
Point-to-point connection between the transmitter and the HART ® master.
The current output of the device may be active or passive.
CAUTION!
In order to ensure reliable HART
® communication with this transmitter, the loop resistance
must be at least 250 Ω!
1 Primary Master
2 HART
® modem
3 HART ® signal
4 Analog indicator
5 Terminal 7
6 Terminal 6
7 Device with address = 0 and passive or active current output
8 Secondary Master
9 Power supply for devices (slaves) with passive current output
10 Load ≥ 250 Ω (Ohm)