Toshiba LF600F - Manual (Page 26)

TOSHIBA
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5.3 Notes on Wiring
5.3.1 Notes on Instrumentation-Converter Wiring
• To avoid 2-point grounding, ground the shield of output cable basically at the receiving side.
• Use a grounding wire of IV wire 5.5mm^ or more. The size of the external grounding terminal screws is
M4. Do not share a grounding wire with other instruments where grounding current may flow. (An
independent grounding is preferable.)
• Power cable
When a 3-core cable is used: Ground with the FG terminal.
When a 2-core cable is used: Use an external grounding terminal and make the cable as short as possible.
Note that, for a replacement from the Toshiba electromagnetic flowmeter converter LF220 type, the
cable grounding position differs.
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LF602F
5.3.2 Notes on Wiring of the LF602F Type
• The detector is shipped with a flow rate signal cable and excitation cable. Be sure to use those cables
coming with the detector.
Note: When the cable length exceeds 30m, cables may not be supplied. Check whether the
cable is supplied with the specs.
• The allowable cable length between the detector and converter varies depending on the conductivity of
the operating fluid. Refer to the instruction manual of the combined detector.
• When connecting with the detector, wire the cables in the order of the excitation cable and flow rate
signal cable.
• Because the input cables transmit very delicate signals, pass the excitation cable and input signal cable
separately through a thick steel conduit tube , keep them away from the large current wiring as
far as possible, and do not install them in parallel.
• When replacing the flow rate signal cable and excitation cable, also refer to the instruction manual of the
relevant detector. Order the detector terminal box cover packing from Toshiba or a Toshiba distributor.
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