Relays; Communications - Siemens SITRANS LUT400 Series Operating Instructions Manual

Relays

Relay contacts are shown in the de-energized position. All relays can be configured as
positive or negative logic (see 2.8.11. Relay Logic).
15
.
RLY 1
Relay Ratings
•
•

Communications

The USB port and the 4 to 20 mA HART terminal block (terminal numbers 22, 23, and 24)
are located inside the enclosure of the device.
TO TRANSDUCER
15
Page 24 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
RELAYS
16 17 18 19 20
RLY 2 RLY 3
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-inductive, 3A at 30 V DC
TS-3 TRANSDUCER
1 2 3 4 5 6
RELAYS
16 17 18 19 20 21
RLY 1 RLY 2 RLY 3
4 to 20 mA Hart
connection
Relays 2, 3 are normally
open.
Relay 1 can be wired either
normally open or normally
21 closed.
In the event of loss of input
power, relays will revert to
their normal states.
DISCRETE INPUTS
7 8 9 10 11
1 2 DC SYNC
0.25 A, 250 V
SLOW BLOW
mA OUT/HART
DISPLAY
22 23 24
PAS
ACT
USB cable
connection
Power Failure
INPUT
POWER
12 13 14
L1 L2/N
TO OTHER
100 - 230V
SIEMENS
UNIT
BATTERY
BR2032
SERVICE
A5E33329501