Siemens SITRANS LUT400 Betriebsanleitung Seite 15

Transducers
Warning: Hazardous voltage present on transducer terminals during
operation.
Run the transducer cable in a grounded metal conduit, separate from other
wiring (except TS-3 temperature sensor wiring, if applicable).
Notes:
• Do not use coaxial cable with SITRANS LUT400 due to high voltage transmitted on
shield of coaxial cable
• Do not connect the LUT400 shield and white transducer wires together; wire to sepa-
rate terminals
• Disregard older transducer manuals that recommend these practices
Relays
Relay contacts are shown in the de-energized position. All relays can be configured as positive
or negative logic (see parameter
15 16
RLY 1
Relay Ratings
• one Form C (NO or NC) relay
(relay 1), 1A at 250 V AC, non-
inductive, 3A at 30 V DC
• two Form A (NO) relays (relays
2,3), 5A at 250 V AC, non-induc-
tive, 3A at 30 V DC
7ML19985XU81
TS-3 TRANSDUCER
1 2 3
2.8. 1 1.Relay Logic
RELAYS
17 18 19 20 21
RLY 2 RLY 3
SITRANS LUT400 (HART)
4 5
in full Operating Instructions).
Power Failure
Relays 2, 3 are normally
open.
Relay 1 can be wired either
normally open or normally
closed.
In the event of loss of input
power, relays will revert to
their normal states.
Page EN-13