Siemens SITRANS Probe LU Quick Start Manual page 8

Connecting SITRANS Probe LU (PROFIBUS PA)
Note:
• For detailed wiring instructions, please see the full manual.
• For Intrinsically Safe setups (FM/CSA Class I, Div. 1), see
Connection Drawing
• For Non-Incendive setups (FM: Class I, Div. 2), see
on page 5 of Appendix A, for drawing number 23650583.
• The non-metallic enclosure does not provide a continuous ground path between conduit
connections: use grounding-type bushings and jumpers.
• Separate cables and conduits may be required to conform to standard instrumentation
wiring practices, or electrical codes.
1. Strip the cable jacket for approximately
70 mm (2.75") from the end of the PROFIBUS PA
cable, and thread the wires through the gland
2. Connect the wires to the terminal as shown:
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
2
connection
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
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).
PROFIBUS PA must be terminated at both extreme ends of the cable for it to
Note:
work properly. Please refer to the
number 2.092), available from www.profibus.com.
1.
If cable is routed through conduit, use only approved suitable-size hubs for waterproof applications.
2.
The instrument shield connection is internally connected to the external ground lug.
Page EN-6 SITRANS Probe LU (PROFIBUS PA) – QUICK START MANUAL
on page 1 of Appendix A, for drawing number 23650617.
, and ground the shield
PROFIBUS PA User and Installation Guidelines
FM/CSA Intrinsically Safe
FM: Class I, Div. 2 Connection Drawing
1
.
shield
wire
(part number A5E00265440) from
(order
A5E32081626