Manual Change for IM 01G05B03-01E 1st Edition : No.15-010-E July 30 2015-00
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) :
(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.
(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.
Manual Change
No. 15-010-E
User’s
Manual
US300FM
Ultrasonic Flowmeter
Unit : mm
(a) Main unit side
(b) Junction box side
Thin lines
(**)
Shield line
Cable
shield
(meshed)
7
±
2
13
±
3
60
±
5
52
±
5
10
±
3
7
±
2
Brown
(*)
White
White
Perform
soldering
(*)
Finish the brown cables as well as white cables.
(**)
You do not connect the thin lines to any terminals.
Brown
(*)
12
±
2
Less
than
10mm
12
±
2
Perform
soldering
Shield line
Cable
shield
(meshed)
Thin lines
(**)
Less
than
5mm
(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.
Gland body
Compression
part
Rubber ring
Cable shield
(ringed-shape)
Outer skin of the cable
Signal lines
Cap nut
Cutaway view of the cable gland
Outer wall of
the main unit
or junction box
Gland body
(concavity part inside)
Cable shield rolled out into a ring-shaped form
Compression part
(convexity part outside)
Components of the cable gland
Grounding resistance
less than 100 ohm
GND
Sensors
Junction box
Main
unit
Transducers
Connection
cable
Connection of the cable shield
Yokogawa Electric Corporation
