Siemens sitrans LR250 Mise En Service Rapide page 8

Mounting instructions
WARNING: For pressure applications, it will be necessary to use PTFE tape or other
appropriate thread sealing compound, and to tighten the process connection
beyond hand-tight.
Threaded Version
1. Before inserting the device into its mounting connection, check to ensure the threads are
matching to avoid damaging them.
2. Simply screw the device into the process connection, and hand tighten, or use a wrench.
A torque of 40 N m (30 ft.lbs) is recommended.
Flanged Version
WARNING: The user is responsible for the selection of bolting and gasket materials
which will fall within the limits of the flange and its intended use, and which are
suitable for the service conditions.
Wiring
Power
WARNINGS:
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.
All field wiring must have insulation suitable for rated voltages.
Connecting SITRANS LR250
WARNINGS:
• Check the device nameplate and process device tag, to verify the approval rating.
• Use appropriate conduit seals to maintain IP or NEMA rating.
Instructions specific to hazardous area installations
• Read
Notes:
• For detailed wiring instructions, please refer to the full Instruction Manual.
• Use twisted pair cable: AWG 22 to 14 (0.34 mm
• Separate cables and conduits may be required to conform to standard instrumentation
wiring practices, or electrical codes.
Page EN-6 SITRANS LR250 (HART) – QUICK START MANUAL
on page 10.
2 2
to 2.5 mm ).
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