Instruction manual

Page 34 SITRANS LR 300 – INSTRUCTION MANUAL 7ML19985CL02
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Interconnection
SITRANS LR 300 Wiring
Notes
• Installation shall only be performed by qualified personnel and in accordance with
local governing regulations.
• The equipment must be protected by a 15 A fuse or circuit breaker in the building
installation.
• The 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.
• Do not use a Ground Fault Interrupt (G.F.I.) with the SITRANS LR 300. The ground path
is used for filtering purposes in conjunction with the universal power supply.
• All Input/Output wiring must be shielded for CE compliance, except for supply voltage.
All field wiring must have insulation suitable for the applied input
voltage.
WARNING: Avoid static discharge to terminals.
1
3
4
7
5
6
2
A
R
S
4
8
5
B
COM
L2/N
L1/+
OI
Supply voltage AC or DC
Shield, installed on
IS version only
RS-485
Modbus, or Dolphin
protocol
HART/mA or
Profibus-PA
SITRANS LR 300.book Page 34 Monday, June 10, 2002 7:18 PM