Electrical Connection - Siemens Sitrans LR400 Instruction Manual

Electrical Connection

Notes:
• The equipment must be protected by a 15A fuse or circuit breaker in the
building installation.
• A circuit breaker or switch in the building installation, marked as the
disconnect switch, shall be in close proximity to the equipment and within
easy reach of the operator.
WARNING:
All field wiring must have insulation suitable for at least 250 V.
AC version:
HART wiring
cable clamp
4 5
3 6 7 8
Rated temperature of
connection cables must
mA
exceed maximum ambient
temperature by at least 15 K
DC version:
HART wiring
cable clamp
3 4 5 6 7 8
Rated temperature of
connection cables must
mA
exceed maximum ambient
temperature by at least 15 K
• The DC input terminals shall be supplied from a source providing electrical isolation
between the input and output, in order to meet the applicable safety requirements of
IEC 61010-1
Notes (AC and DC versions):
• 4-20 mA, PROFIBUS PA, DC input circuits, 14 - 20 AWG, shielded copper
wire
• AC input circuit, min 14 AWG copper wire
• Recommended torque on terminal clamping screws, 0.5 - 0.6 Nm.
7ML19985FH06 SITRANS LR400 (7ML5421) – INSTRUCTION MANUAL
earth
terminal
1 2
L L
1 2
N
earth
terminal
1 2
19-30 V
PROFIBUS wiring
cable clamp
3 4 5 6 7 8
Rated temperature of
connection cables must
PROFI-
exceed maximum ambient
BUS PA
temperature by at least 15 K
PROFIBUS wiring
cable clamp
3 4 5 6 7 8
Rated temperature of
connection cables must
PROFI-
exceed maximum ambient
BUS PA
temperature by at least 15 K
earth
terminal
1 2
L L
1 2
N
earth
terminal
1 2
19-30 V
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