ABB TTR200 Operating Instructions Manual page 17

Standard application with HART functionality
Fig. 6
A Transmitter
Adding resistance R
U
Mmin
Where
U
Mmin
U
Smin
R :
Ltg
R :
250
Pos: 14.15 /======= Seitenumbruch ======== @ 0\mod_1126532365768_3101.doc @ 3830
OI/TTR200-EN
Field
increases the minimum supply voltage:
250
≤ U
+ 0.02A x (R
Smin Ltg
: Minimum operating voltage of transmitter (refer to technical data for transmitter)
: Minimum supply voltage of repeater power supply / SPS input
Line resistance between transmitter and power supply
Resistance for HART functionality
B Power supply / SPS input with supply
+ R )
250
TTR200
Electrical connection
Control room
17