Siemens sitrans LR300 Manual Del Usuario página 5

Rod Assembly
Optional
Extension
PTFE paste is supplied with
PTFE rod antenna versions
(non-sanitary type).
SITRANS LR300 Wiring Requirements
Increased safety, EEx e version,
or General safety,
or Hazardous EEx d version:
Notes:
• Recommended torque on terminal clamping screws is 0.5 – 0.6 Nm.
• Connect shielding of instrument cables to ground at one end only.
• All Input/Output wiring must be shielded for CE compliance, except for supply voltage.
WARNINGS:
• All field wiring must have insulation suitable for the rated voltage.
• Avoid static discharge to terminals.
SITRANS LR300 Wiring
HART/mA or
PROFIBUS PA
RS-485
Modbus, or Dolphin
protocol
supply voltage AC or DC
Page EN-4 SITRANS LR300 – QUICK START MANUAL
Notes:
• Water or process fluids must not enter the
connecting threads: this could cause reflections
at the connection, which will appear as false
100 mm (4")
echoes.
• Apply a small amount of PTFE paste to the
antenna threads before threading the antenna
together, and tighten slowly. Ensure that the rod
50 mm (2")
sections mate securely with no gaps. Do not
apply too much PTFE paste or the parts will not
mate securely.
• Do not use wrenches or pliers. Hand tighten only
(except in pressure applications: see warning
above).
shield, installed on
1
IS version only
I O
2
3 A
R
S
4 4
B
8
5
5
COM
6
L2/N
7
L1/+
2
rigid solid 0.2 to 4 mm
flexible stranded 0.2 to 2.5 mm
AWG 24 to 12
2
7ML19985QA85