Page 24 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS A5E33329501
mmmmm
Connecting
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).
.
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.
RELAYS
RLY 1 RLY 2
RLY 3
21201918171615
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-inductive, 3A at 30 V DC
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.
TO TRANSDUCER
TO OTHER
SIEMENS
UNIT
BATTERY
BR2032
0.25 A, 250 V
SLOW BLOW
DISPLAY
SERVICE
RELAYS
TRANSDUCER
WHT
DISCRETE INPUTS
INPUT
POWER
mA OUT/HART
22 23 24
ACT
PAS
SYNC
11
6
1
2
97108
DC
14253
RLY 1 RLY 2 RLY 3
21201918171615
L1 L2/N
12 13 14
100 - 230V
BLK
SHLD
WHT
BLK
TS-3
USB cable
connection
4 to 20 mA Hart
connection
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