Connecting
5.2 Connecting SITRANS LR250
SITRANS LR250 with FOUNDATION FIELDBUS
32 Compact Operating Instructions, 09/2021, A5E48453221-AB
Wiring instructions
1. Strip the cable jacket for approximately 70 mm (2.75") from the end of the cable.
2. Thread the wires through the gland. (If cable is routed through conduit, use only approved
suitable-size hubs for waterproof applications.)
3. Strip/remove conductor jacket to 8 mm from end.
4. Connect the wires to the terminals as shown: SITRANS LR250 (FF) is not polarity sensitive.
5. Terminal block suggested screw torque: 7.0 lb-inch.
6. Ground the device according to local regulations.
7. Tighten the gland to form a good seal.
8. Close the lid and secure the locking screw before programming and device configuration.
Note
Lid-lock set screw not applicable to 3-A Sanitary approved device.
Foundation Fieldbus (H1) must be terminated at both extreme ends of the cable for it to
work properly.
For optimum EMC protection, it is recommended that the FF H1 cable shield be connected
to ground at every node.
Please refer to the Foundation Fieldbus System Engineering Guidelines (AG-181) Revision
2.0, for information on installing FF (H1) devices available from:
Foundation Fieldbus (
http://www.fieldbus.org/)
If a Weidmüller or other current limiting junction box is connected to this device, please
ensure that the current limit is set to 40 mA or higher.
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