Yokogawa ADMAG AXR - Manual (Page 36)

<4. WIRING>
4-12
IM 01E30D01-01EN
Table 4.6.4 General - purpose Use/Explosion Proof Type except TIIS Wiring Examples (Digital External Indicator
Using Current Output)
Connection Description
Current Output
Example 1
Connection to digital
external indicator
SUPPLY
DO
Distributor, etc.
+
-
R3
+
-
+
-
AXR Terminal
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
Transmission of AXR
output might fail when
the external indicator
breakdown occurs.
R3 [ Ω ]:
Load Resistance
Example 2
Connection to analog
external indicator
Cable Resistance : R1[Ω] *9
Cable Resistance:R4[Ω] *9
Cable Resistance : R2[Ω] *9
Transmission of AXR
output might fail when
the external indicator
breakdown occurs.
SUPPLY
DO
Distributor, etc.
+
-
R3
+
-
+
-
AXR Terminal
E1
+ -
Analog External Indicator
Relaying
terminal
Internal resistance 10 Ω or less
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
R3 [ Ω ]:
Load Resistance
*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).