Yokogawa ADMAG AXR - Manual (Page 33)

<4. WIRING>
4-9
IM 01E30D01-01EN
IMPORTANT
Precaution for Pulse Output
• As this is a transistor contact (insulated
type), give attention to proper voltage and
polarity when wiring.
• Do not apply a voltage larger than 30 V DC
or a current larger than 120 mA in order to
prevent damage to the instrument.
• When input filter constant of the electronic
counter is large in relation to the pulse width,
the signal will decrease and the count will not
be accurate.
• If the input impedance of the electronic
counter is large, an induction noise from
the power supply may result in inaccurate
counts. Use a shield cable or sufficiently
reduce the input impedance of the electronic
counter within the electromagnetic flowmeter
pulse output specification range.
• The load resistance for pulse output is
necessary. Refer to Table 4.6.3.
• Neither no load resistance nor too small
value of load resistance for pulse output will
give a damage to the instrument.
IMPORTANT
Precaution for Status Output and Alarm Output
• As this is a transistor contact (insulated
type), give attention to proper voltage and
polarity when wiring.
• Do not apply a voltage larger than 30V DC
or a current larger than 120 mA 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 Table 4.6.2.
* 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.
NOTE
Precaution for Pulse Output
For pulse output from the DO terminal,
parameters must be set. Refer to “6. Parameter
Description” in this user’s manual.
NOTE
Precaution for Status Output and Alarm Output
For status output and alarm output from the DO
terminal, parameters must be set. Refer to “6.
Parameter Description” in this user’s manual.
(3) Simultaneous Current-Pulse Output
When simultaneous output of current and pulse
output are used, no communication is possible in
some cases.
Refer to Table 4.6.3 as wiring examples.
Refer to (2) for specifications and precautions of the
pulse output.
(4) The Wiring of Digital External Indicator
Using Current Output
Refer to Table 4.6.4 as wiring examples.