Wiring Diagrams; Input Signal Connections; Dc Power Connection; Figure 5. Flowmeter Powered By External Supply (Active) - YOKOGAWA YPP6830-AP0-0 Instruction Manual

YPP6830 Explosion-Proof Pulse Input Rate/Totalizer

Wiring Diagrams

Input Signal Connections

Signal connections are made to a barrier terminal
mounted in the base of the enclosure. Input level and
type are configured using the slide switches on the
bottom of the display module as shown in the lower
right of the following figures.
Power
Supply
Flowmeter
(Pulse Output)
P+
COM RST
Figure 5. Flowmeter Powered by External Supply
(Active)
Power
Supply
Flowmeter
(Pulse Output)
P+ COM RST
Figure 6. Isolated Flowmeter Powered by External
Supply (ISO)
Flowmeter
(Magnetic Pickup Coil)
P+ COM
Figure 7. Self-Powered Magnetic Pickup Coil Flowmeter
(Coil)
+3.0 V
100 kOhm
Internal Pullup
P+ COM RST S+ S-

Figure 8. NPN Open Collector Input

INPUT LEVEL
mV V ISO
S+ S-
INPUT LEVEL
mV V ISO
S+ S-
INPUT LEVEL
mV V ISO
RST S+ S-
NPN
SENSOR
INPUT LEVEL
mV V ISO

Figure 9. PNP Sensor with External Power

Figure 10. Switch Contact Input (Reed)

DC Power Connection

Models configured for DC power (YPP6830-A) are
provided with a terminal labeled P+ and are wired as
shown in Figure 11. Models configured for battery
power (YPP6830-B) may optionally be connected to
DC power and the battery will function as backup
power when DC is lost. The same power supply may
be used to power other circuits including a PNP-type
sensor, however, to maintain input isolation, a separate
power supply must be used to power the isolated 4-20
mA transmitter as shown in Figure 13 and/or to power
the Opto-Isolated Flowmeter as shown in Figure 6.
P+ COM

Figure 11. DC Power Connections

14
Instruction Manual
RST S+ S-