Operation Manual

5-10
IM 1F5B2-01E
• First of Three Examples – Communication is possible (up to a distance of 2 km when a CEV cable is used).
+
–
+
Shielded cable
Distributor
250Ω
R
Electronic counter
E (10.5-30 V DC)*1
Counting input
Common
24V DC
*1: This su
pp
l
y
volta
g
e re
q
uires a
p
ower source with a maximum out
p
ut current of no less than E/R.
SUPPLY
PULSE
• Second of Three Examples – Communication is possible (up to a distance of 200 m when the pull-up
resistance is 1 kΩ).
+
–
+
Shielded cable
250Ω
R
Electronic counter
E (16.4-30 V DC)*2
Counting input
Common
Recorder or other
instrument
*2: This supply voltage requires a power source with a maximum output current of no less than E/R + 25 mA.
The inductance of the
p
ower out
p
ut should less than 1/1000 of Pull-u
p
resistance
(
R
)
.
SUPPLY
PULSE
• Third of Three Examples – No communication is possible (except when there is no process fluid flowing).
+
–
250Ω
R
Electronic counter
E (16.4-30 V DC)*2
Counting input
Common
Recorder or other
instrument
*2: This supply voltage requires a power source with a maximum output current of no less than E/R + 25 mA.
+
SUPPLY
PULSE
Figure 5.6-4 Wiring of ULTRA YEWFLO (Simultaneous Analog-Pulse Output)
IMPORTANT
• For the shielded cables in the first and second examples of flowmeter installation, use
two-wire separately shielded cables.