YOKOGAWA VY Series - Page 26

Connection Description
Example 2:
When using 3-wire
cable
HART communication
not possible
+
+
SUPPLY
D
OUT
A
IN
-
-
+
-
R4
E1
+
-
(
*1-3)
(
*3-1)
(*4)
(*5)
Vortex Flowmeter
Cable resistance R1[Ω]
Cable resistance R2[Ω]
Electric
counter
*1-3: 0.0244 x (R1+R2) + 10.5 ≤ E1 [V] ≤ 30
● Status output and
alarm output
Example 1:
When using 4-wire
cable
HART communication
not possible
+
+
SUPPLY
D
OUT
A
IN
-
-
+
-
E1(*1-4)
E2
(*1-4)
Vortex Flowmeter
Cable resistance R1[Ω]
Cable resistance R2[Ω]
Relay
AC power supply
Solenoid
valve, etc.
* 1-4: 0.0244 x (R1+R2) + 10.5 ≤ E1 [V] ≤ 42 (*2)
E2: 30Vdc max, 80mA max
Example 2:
When using 3-wire
cable
HART communication
not possible
+
+
SUPPLY
D
OUT
A
IN
-
-
+
-
E1
E2
(*1-5)
(*1-5)
Vortex Flowmeter
Cable resistance R1[Ω]
Cable resistance R2[Ω]
Relay
AC power supply
Solenoid
valve, etc.
* 1-5: 0.0244 x (R1+R2) + 10.5 ≤ E1 [V] ≤ 42 (*2)
E2: 30Vdc max, 80mA max
● Simultaneous
analog/pulse
output (*9)
Example 1:
When using 2-wire
individually shielded
(4-wire) cables
One cable entry
R4
+
+
SUPPLY
D
OUT
A
IN
-
-
+
-
E2
+
-
(*3)
+
-
E1
(*4)
(*5)
(
*1-6)
(*1-6)
Vortex Flowmeter
Cable resistance R1[Ω]
Cable resistance R2[Ω]
Shielded Cable(*6)
Load resistance
R3 (Ω)
Distributor
(or signal conditioner card, etc.)
Electric
counter
*1-6: 0.0244 x (R1+R2+R3) + 10.5 ≤ E1 [V] ≤ 42 (*2)
E2 [V] ≤ 30
Example 2:
When using 2-wire
individually shielded
cables
Two cable entries
R4
+
+
SUPPLY
D
OUT
A
IN
-
-
+
-
E2
+
-
(*3)
+
-
E1
(*1-7)
(
*1-7)
Vortex Flowmeter
Cable resistance R1[Ω]
Cable resistance R2[Ω]
Shielded Cable
(*6), (*7)
Shielded Cable
(*6), (*7)
Electric
counter
Distributor
(or signal conditioner card, etc.)
Load resistance R3 (Ω)
*1-7: 0.0244 x (R1+R2+R3) + 10.5 ≤ E1 [V] ≤ 42 (*2)
E2 [V] ≤ 30
<4. Wiring>
25
IM 01F07A01-01EN
Wiring
4