Standard Application - ABB TTF300 Inbetriebnahmeanleitung

Electrical connection
4.4.1

Standard application

Fig. 9
A Transmitter
When connecting transmitters and repeater power supplies, observe the following specification:
U
Mmin
Where
U
Mmin
U
Smin
R : Line resistance between transmitter and repeater power supply
Ltg
For HART functionality, use repeater power supplies or SPS input cards with Hart mark. If this is
not possible, the interconnection must have a resistance ≥ 250 Ω (< 1100 Ω).
The signal line can be connected with or without ground. When connecting the ground (minus
side), make sure that only one side of the contact is connected to the equipotential bonding
system.
14 - EN
Field
≤ USmin + 0.02A x RLtg
: Minimum operating voltage of transmitter (refer to technical data for transmitter)
: Minimum supply voltage of repeater power supply / SPS input
B Repeater power supply / SPS input with
supply
TTF300
Control room
CI/TTF300-X1