Siemens Sitrans Probe LU Instruction Manual page 21

Oxley Creek WWTP Water Reclamation
(Probe LU Manual) Vendor Manual
2. Connect the wires to the terminals as shown below (the Probe LU [PROFIBUS PA] is
not polarity-sensitive).
shield wire
3. Ground the instrument according to local regulations.
• For Intrinsically Safe applications, connect the cable shield to the instrument
shield connection
is connected to an equal-potential grounding grid. For more detail on Explosion
Protection, you can download the brochure
Explosion Protection
under Brochures/General.
• For general purpose applications, ground the shield at one point only (usually
the power supply side) and continue the shield from device to device,
connecting it to the shield connection in each Probe LU.
4. Tighten the gland to form a good seal.
5. Close the cover and tighten screws:
Recommended torque is 0.5 to 1.1 N-m (5 to 10 in-lb)
Note:
PROFIBUS PA must be terminated at both extreme ends of the cable for it to
work properly. Please refer to the
number 2.092), available from www.profibus.com.
1.
The instrument shield connection is internally connected to the external ground
lug.
7ML19985JB02
1
, and ground the shield connection to an external ground that
(part number A5E00265440) from: www.siemens.com/level,
PROFIBUS PA User and Installation Guidelines
SITRANS Probe LU (PROFIBUS PA) – INSTRUCTION MANUAL
Doc Id: VM11
Active Date: 15/12/2006
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Page 15