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康气通ControlAir Type 500 电气转换器(I/P, E/P))图纸资料说明:Type 500X Electropneumatic Transducer (I/P, E/P)Economical and reliable electrical conversion to pressure,The ControlAir Type 500X,converts a current or voltage,input signal to a linearly proportional,pneumatic output,pressure. This versatile instrument,is designed for control applications that require a high degree of reliability and,repeatability at an economical,cost. Optional NEMA 4X(IP65) version allows for,splashdown and outdoor,installation. Typically, these,units are used for applications,that require the operation of,valve actuators, pneumatic,valve positioners, damper,and louver actuators, final,control elements, relays, air cylinders, web tensioners,clutches, and brakes.Industries that utilize the Type500X include Petrochemical,HVAC, Energy Management,Textile, Paper, Paper Converting, Food and Drug
 The Type 500X is available in two different
versions. The lower range model is
designed for standard process control
applications which typically utilize a 3 to
15 psig output. The extended range unit
provides up to 120 psig output for higher
pressure industrial pneumatic and
process control system requirements.
Principle of Operation
The Type 500X Transducer is a force
balance device in which a coil is suspended
in the field of a magnet by a
flexure. Current flowing through the coil
generates axial movement of the coil
and flexure. The flexure moves towards
the nozzle and creates back pressure
which acts as a pilot pressure to an integral
booster relay. Input signal increases
(or decreases for reverse acting) cause
proportional output pressure increases.
Zero and Span are calibrated by turning
adjust screws on the front face of the
unit. Adjustment of the zero screw repositions
the nozzle relative to the flexure.
The span adjustment is a potentiometer
that controls the amount of current
through the coil.
Mounting
The Type 500X may be mounted by
pipe, panel, or bracket. Field adjustment
of the zero may be required if position is
changed. High external vibration may
cause output fluctuations. Mounting in a
vibration-free area is recommended.
Split Ranging
If split ranging is required the 4-20 mA
input, 3-15 psig output version
(ControlAir part number 500-AC) can be
recalibrated to provide a 3-9 psig or 9-
15 psig output.
Intrinsically Safe
The Type 500X has been tested and
approved by Factory Mutual as
Intrinsically Safe Class I, II, and III,
Division 1, Groups C, D, E, F and G
when used with an apparatus meeting
the following entity requirements:
Vmax = 29.9 V Cl = 0 Cl is capitance
Imax = 65 mA Ll = 35 mH Ll is inductanceNEMA-4X (IP65) Enclosure
Optional Factory Mutual NEMA 4X
enclosure rating allows for installation in
splashdown or outdoor environments.
Unit also meets the requirements of IEC
standards IP65.
Installation should be in accordance with
ControlAir interconnection drawing no.
431-990-013. This drawing is included in
the Type 500X Installation, Operation and
Maintenance Instruction. The Intrinsically
Safe approval is a standard feature of the
Type 500X and applies only to units with
a 4-20 mA input signal that are installed
with the following barriers:
R.Stahl, Inc. barriers: MTL, Inc. barriers:
9001/01-280-100-10 728
9002/13-280-110-00 787S+
4045
The Type 500X is also Factory Mutual
Approved as Nonincendive for Class I,
Division 2, Groups A, B, C and D, and
suitable for Class II and III, Division 2,
Group F and G. Barriers are not required
for nonincendive rating.
Field Reversible
In the reverse acting mode the output is
the opposite of the direct acting mode
(i.e. 4-20 mA input creates a 15-3 psig
output). To change from direct acting to
reverse acting simply reverse the polarity
of the signal leads and recalibrate. Input
signal failure causes output pressure to
reach maximum value (i.e. 15 psig)
when reverse acting.

 

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