External Device Connections And Grounding; Notes On Wiring - Toshiba LF664 Instruction Manual

5.2 External Device Connections and Grounding

For the notes on connecting, wiring and installation of the combined converter, check the model
number of the combined converter and read the instruction manual of the relevant converter.

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
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.
5.3.2 Notes on Wiring of the Separate type (LF664)
LF622F
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 300m, cables may not be supplied. Check
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.
whether the cable is supplied with the specs.
2
or more. The size of the external grounding terminal
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