YOKOGAWA US300FM User Manual

User's
Manual
This is the supplement for the original manual (No. IM 01G05B03-01E, 1st Edition) regarding the added and changed
items. Please also refer to this supplement when you read the manual.
Addition to the section "3.5.4 Connection of the Transducers" (page 18) :
(1) Cable Finish
The cable finish should be done as the drawings (a) and (b)
shown in the right.
(2) Cable Gland
When tightening the gland, not only pull back the cable shield
(meshed part) but also roll it out into a ring-shaped form and let
it be pushed by the compression part (grey-colored plastic) so
that the cable shield will have electrical contact with the gland
body. Also, be sure to align the convexity part outside the
compression part and the concavity part inside the gland body.
Refer to the drawings below.
Cable shield rolled out into a ring-shaped form
Compression part
(convexity part outside)
Components of the cable gland
(3) Grounding
The connection of the cable shield will be realized as shown in the drawing below after going through the
procedures (1) and (2) in the above. Connect the main unit to the ground through the terminal "PE" of the power
supply terminals in the main unit. The grounding resistance should be less than 100 ohm.
Transducers
Sensors
(4) Connecting the Sensor ROMs
Connect the sensor ROMs to the corresponding terminals in the main unit when connecting transducers. The
sensor ROMs are packed and affixed to the transducers when shipped from the factory.
Yokogawa Electric Corporation
US300FM
Ultrasonic Flowmeter
Gland body
(concavity part inside)
Junction box
Connection
cable
Connection of the cable shield
(a) Main unit side
Perform
soldering
White
Cable
shield
(meshed)
(*) Finish the brown cables as well as white cables.
(**) You do not connect the thin lines to any terminals.
Gland body
Cap nut
Rubber ring
Compression
part
Cutaway view of the cable gland
Grounding resistance
Main
less than 100 ohm
unit
GND
Manual Change for IM 01G05B03-01E 1st Edition : No.15-010-E July 30 2015-00
Manual Change
No. 15-010-E
(b) Junction box side
Unit : mm
Perform
soldering
Shield line
Shield line
Brown (*)
White
Less
than
10mm
Cable
Thin lines
shield
(**)
(meshed)
Outer skin of the cable
Cable shield
(ringed-shape)
Signal lines
Outer wall of
the main unit
or junction box
Brown (*)
Less
than
5mm
Thin lines
(**)