7ML19985JB02 SITRANS Probe LU (PROFIBUS PA) – INSTRUCTION MANUAL Page 15
Wiring
2. Connect the wires to the terminals as shown below (the Probe LU [PROFIBUS PA] is
not polarity-sensitive).
3. Ground the instrument according to local regulations.
• For Intrinsically Safe applications, connect the cable shield to the instrument
shield connection
1
, and ground the shield connection to an external ground that
is connected to an equal-potential grounding grid. For more detail on Explosion
Protection, you can download the brochure
Siemens Process Automation
Explosion Protection
(part number A5E00265440) from: www.siemens.com/level,
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: please do not overtighten screws.
Recommended torque is 0.5 to 1.1 N-m (5 to 10 in-lb).
1.
The instrument shield connection is internally connected to the external ground
lug.
Note: PROFIBUS PA must be terminated at both extreme ends of the cable for it to
work properly. Please refer to the
PROFIBUS PA User and Installation Guidelines
(order
number 2.092), available from www.profibus.com.
shield wire
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