KROHNE OPTITEMP TT 50 C-R EN - Manual (Page 21)

OPERATION
5
21
OPTITEMP TT 50 C/R
www.krohne.com 09/2010 - 4000636502 - MA OPTITEMP TT 50 C/R R03 en
Operation
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.
DANGER!
Only connect an Ex approved HART
® modem located in a safe area to a transmitter in a
potentially explosive area.
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 5
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)
.book Page 21 Monday, September 13, 2010 5:07 PM