Yokogawa ADMAG AXR - Manual (Page 29)

<4. WIRING>
4-5
IM 01E30D01-01EN
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In case grounding rings
are used.
Hazardrous
area
Grounding ring
Non-hazardrous
area
Class A
grounding
In case grounding rings are
not used.
(Available only for metal piping)
[TIIS Explosion Proof Type]
• TIIS Explosion Proof Type: Grounding resistance of 10 Ω or less is
necessary for class A grounding
terminal.
Grounding resistance of 100 Ω or less
is necessary for Functional grounding
terminal.
When the optional code A is selected,
grounding resistance of 10 Ω or less
shall be required.
Figure 4.4.3 Grounding
IMPORTANT
Class A grounding should be installed in non-
hazardrous area.
4.5 Wiring Connections
(1) Removing Cover
The cover has the locking screws in front and
behind it as shown in Figure 4.5.1 in case of
explosion proof type. This is used for the cover-
lock system. Loosen cover locking screws
clockwise using a hexagonal wrench (nominal size
3) to unlock the cover. (Upon shipment from the
manufacturing plant, the cover is unlocked.)
Hold the flowmeter with your hand and remove the
cover by turning it in the direction of the arrow as
shown below (both explosion proof and general
purpose types).
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Cover locking
screws
Explosion proof type Both Explosion proof and
General purpose types
Figure 4.5.1 Removing the Terminal Box Cover
(2) Terminal Configuration (General - purpose
Use/Explosion Proof Type except TIIS)
When the cover is removed, the connection
terminals will be visible.
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SUPPLY
DO
+
−
+
−
➂
➃
➄
➀
➁
Figure 4.5.2 Terminal Configuration