Yokogawa ADMAG AXR - Manual (Page 39)

<4. WIRING>
4-15
IM 01E30D01-01EN
Table 4.6.7 TIIS Explosion Type Wiring Examples (Digital External Indicator Using Current Output)
Connection Description
Current Output
Example 1
Connection to digital
external indicator
Distributor, etc.
+
R3 E1 Cable Resistance:R1[Ω] *9
Cable Resistance:R4[Ω] *9
0.0236 × (R1 + R2 + R3 + R4) + V2 + 14.7 ≤ E1 [V] ≤ 42
*10
In the case of R3 = 250 [Ω]
0.0236 × (R1 + R2 + R4) + V2 + 20.6 ≤ E1 [V] ≤ 42
*10
Cable Resistance:R2[Ω] *9
Digital External Indicator
Relaying
terminal
77.7%
V2: Voltage between terminals of External Indicator
V2
R3 [ Ω ]:Load Resistance
JIS Class A
Hazardous area Non-hazardous area
AXR Terminal
SUPPLY
DO
Transmission of AXR
output might fail when
the external indicator
breakdown occurs.
+
-
+
-
+ -
-
Example 2
Connection to analog
external indicator
Cable Resistance:R4[Ω] *9
Distributor, etc.
R3
E1
0.0236 × (R1 + R2 + R3 + R4 + 10) + 14.7 ≤ E1 [V] ≤ 42
*10
In the case of R3 = 250 [Ω]
0.0236 × (R1 + R2 + R4 + 10 ) + 20.6 ≤ E1 [V] ≤ 42
*10
Analog External Indicator
Internal resistance 10 Ω or less
R3 [ Ω ]:Load Resistance
JIS Class A
AXR Terminal
SUPPLY
DO
Relaying
terminal
Transmission of AXR
output might fail when
the external indicator
breakdown occurs.
+
-
+
-
+
-
+ -
Cable Resistance : R1[Ω] *9 Cable Resistance : R2[Ω] *9
Hazardous area Non-hazardous area
*6: To avoid the influence of external noise, use an electric counter which fits to the pulse frequency.
*7: Resistor is not necessary in the case of an electric counter which can receive contact pulse signal directly.
*8: Ground the AXR to avoid the current output error in simultaneous current-pulse output.
*9: Calculate the cable resistance by using the following as a rough guideline: 10.9 Ω per 1 km for the cable with the cross section of
2 mm 2 , 19.5 Ω per 1 km for the cable with the cross section of 1.25 mm 2 .
*10: The maximum voltage is 32 V DC in the case of Lighting Protector specification (optional code A).
(5) Installing the Cover
Install the cover to the flowmeter by turning it in the direction of the arrow as shown below. Tighten cover
locking screws counterclockwise using a hexagonal wrench (nominal size 3) to lock the cover (in case of
explosion proof type).
F0418.ai
Explosion proof type Both Explosion proof and
General purpose types
Cover locking screw
Front
side
 
Figure 4.6.5 Installing the Terminal Box Cover