Yokogawa AXFA14G/C - Manual (Page 20)

IM 01E20C02-01E 4-8
4. WIRING
F0417.EPS
Protective diode
PULSE OUT
PULSE OUT
AXFA14
AXFA14
DO+
DO-
DO+
DO-
Output voltage: 24 V DC Ϯ20%
• Current: 150 mA or less
Pulse rate: 0.0001 to 2 pps
Pulse width: 20, 33, 50, 100 ms
Mechanical Counter
Electronic Counter Load
Figure 4.4.9 Active Pulse Output Connection (Optional
code EM)
᭹ Status Input
IMPORTANT
Status inputs are designed for use with no-
voltage (dry) contacts. Be careful not to connect
the status to any signal source carrying voltage.
Applying voltage may damage the input circuit.
AXFA14
DIO+
DIO-
F0418.EPS
No-voltage status input
Closed: Less than 200 Ω
Open: More than 100 k Ω
Figure 4.4.10 Status Input Connection
NOTE
For status input to the DIO terminals, parameters
must be set. Refer to “Chapter 6: Parameter
Description” in this manual.
᭹ Status Output / Alarm Output
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 4.4.11.
*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.
F0419.EPS
Load
Protective diode
External power supply
30V DC, 0.2A. max
AXFA14
AXFA14
This connection is not possible.
DO+ (or DIO+)
DO- (or DIO-)
DO+ (or DIO+)
DO- (or DIO-)
Electromagnetic
valve
AC power supply
Relay
Figure 4.4.11 Status Output/Alarm Output Connection
NOTE
For status and alarm outputs from the DO or
DIO terminals, parameters must be set. Refer to
“Chapter 6: Parameter Description” in this
manual.
4.4.8 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.
F0420.EPS
Cover locking
screws
Figure 4.4.12 Installing the Terminal Box Cover