User's Manual AXF Magnetic Flowmeter Integral ... - Yokogawa

Status Input
AXF integral flowmeter DO+ (or DIO+)
Protective diode
4. WIRING
IMPORTANT
Status inputs are designed for use with novoltage
(dry) contacts. Be careful not to connect
the status to any signal source carrying voltage.
Applying voltage may damage the input circuit.
Load
DO- (or DIO-)
AXF integral flowmeter DO+ (or DIO+)
DO- (or DIO-)
This connection is not possible.
Relay
Electromagnetic
valve
Closed: Less than 200 Ω
Open: More than 100 kΩ
DIO+
AXF integral flowmeter
External power supply
30V DC, 0.2A. max
AC power supply
Figure 4.1.14 Status Output/Alarm Output Connection
F0415.EPS
DIO-
NOTE
No-voltage status input
Figure 4.1.13 Status Input Connection
NOTE
F0414.EPS
For status and alarm outputs from the DO or
DIO terminals, parameters must be set. Refer to
“Parameter Description” in the user’s manual of
the AXF Integral Flowmeter [Software Edition]
(IM 01E20C02-01E).
For status input to the DIO terminals, parameters
must be set. Refer to “Parameter Description” in
the user’s manual of the AXF Integral Flowmeter
[Software Edition] (IM 01E20C02-01E).
Status Output / Alarm Output
(7) Installing the Cover
Install the cover to the flowmeter by turning it in the
direction of the arrow as shown below. Tighten cover
locking screw 2 counterclockwise using a hexagonal
wrench (nominal size 3 mm) to lock the cover.
IMPORTANT
Since this is an isolated transistor output, be
careful of voltage and polarity when wiring. Do
not apply a voltage larger than 30V DC or a
current larger than 0.2A in order to prevent
damage to the instrument.
This output cannot switch an AC load. To switch
an AC load, an intermediate relay must be
inserted as shown in Figure 4.1.14.
*The alarm output operates from open (normal)
to closed (alarm occurrence) in the default value
(as setup upon plant shipment). Changes can
be made via the parameter settings.
Cover locking
screws
Figure 4.1.15 Installing the Terminal Box Cover
F0416.EPS
4-7
IM 01E20D01-01E