PSN1 / PSN3
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-4857 Rev.10 P. 2 / 9
POINTS OF CAUTION
■
CONFORMITY WITH EU DIRECTIVES
• This equipment is suitable for Pollution Degree 2 and
Installation Category II (transient voltage 2500V). Re-
inforced insulation (Signal or metallic housing or seq.
signals or battery status (with failsafe function only) to
power: 300V) is maintained. Prior to installation, check
that the insulation class of this unit satisfies the system
requirements.
• Altitude up to 2000 meters.
• The equipment must be installed such that appropriate
clearance and creepage distances are maintained to con-
form to CE requirements. Failure to observe these re-
quirements may invalidate the CE conformance.
• Install lightning surge protectors for those wires connect-
ed to remote location. Refer to “LIGHTNING SURGE
PROTECTION” section below.
■
POWER INPUT RATING & OPERATIONAL RANGE
• Locate the power input rating marked on the product and
confirm its operational range as indicated below:
100 – 120V AC rating: 90 – 132V, 47 – 66 Hz,
approx. 240VA (200VA for PSN3)
200 – 240V AC rating: 180 – 264V, 47 – 66 Hz,
approx. 240VA (200VA for PSN3)
24V DC rating: 24V ±10%, approx. 3A
■
GENERAL PRECAUTIONS
• DO NOT install signal wires and power supply wires to-
gether in one duct because it may cause a malfunction
due to inductive noises. If they must be installed togeth-
er, use shielded cables.
• If input signals are to be turned on/off with power sup-
plied to the actuator, be sure to set the abnormal low in-
put operation mode.
■
ENVIRONMENT
• Inside building. If outside, keep away from direct sun-
light.
• Operating temperature -25 to +55°C (-13 to +131°F) for
PSN1; -15 to +55°C (5 to 131°F) for PSN3.
• Operating humidity 30 to 85% RH (non-condensing)
• Vibration 2 G (19.6 m/s
2
) max.
• The actuator must be installed in a place where mainte-
nance and inspection can be conducted. Observe at least
15 cm (5.9 in.) of open space at the top of its cover for
maintenance and inspection.
• Keep away from hazardous atmosphere such like explo-
sive or corrosive gases.
■
SOUND ACCOMPANYING MOTOR ROTATION
• The PSN’s stepping motor inherently generates whistling
sound during normal operation according to its rotating
frequency, larger with lower frequencies. DO NOT be
alarmed.
■
PID CONTROL SIGNAL
• Choose PID parameters carefully so that the MV remains
as stable as possible. Unstable control shortens the life of
actuator and valve.
■
GASKET
• Be sure to return the gasket when you close the cover
after wiring or adjustments.
■
SCREW TORQUE
• The torque for tightening screws for the cover is between
2.4 – 3.1 N·m (1.8 – 2.3 ft·lb).
■
DESIGNING YOKE
• When a foreign object is caught in the valve, a thrust as
great as 7500 N (1686 lb) could be applied to the yoke.
Observe enough strength when designing mechanical
components such like the yoke.
• When the PSN is used on a steam stream in temperature
control, its temperature may rise beyond ambient tem-
perature caused by a heat conducted or radiated from pip-
ing. Use a longer yoke for effective heat dissipation and
apply insulation material.
■
OPERATING CONDITION
• Depending on operating condition, internal temperature
may rise extremely high.
• When operating continuously with such a condition, it
causes short life span or damage and may impair expect-
ed performance.
• Operate with an enough margin such as shortening the
operational duty time ratio.
