<2. Overview>
2-1
IM 21B03D01-01E
2. Overview
2.1 Functional Description
The PK200 current-to-pneumatic converter is
a signal converter that receives an electronic
controller or DCS control signal and converts it into
a pneumatic pressure signal.
2.2 Standard Specifications
Materials:
Case: Aluminum die-cast
Paint: Polyurethane resin-baked finish
Paint color: Deep-sea moss-green
(Munsell 0.6GY3.1/2.0 or equivalent)
Pressure Gauge Case: Stainless steel
JIS SUS304
Input Signals:
4 to 20mA DC or 10 to 50mA DC
Input Resistance:
PK200 is not a constant resistor.
Equivalent circuit of PK200 is shown in Figure 2.1
Constant
Voltage
Circuit
50Ω MAX
Input Signal
4 to 20mA DC
5V DC
(8V DC for TIIS Intrinsically
safe type /JS3.)
F0201.ai
Figure 2.1
Equivalent Circuit
Operating Voltage:
Input Signal
Min.
Max.
4 to 20mA
(except /JS3)
5.2V (at 4mA)
6.0V (at 20mA)
4 to 20mA
(for /JS3)
8.2V (at 4mA)
9.0V (at 20mA)
10 to 50mA
5.35V (at 10mA)
6.75V (at 50mA)
Output Signals:
See Table 2.1
I/O Action:
Output pressure increases as input increases.
Manual Operation:
Available using auto/manual (A/M) transfer
switch (Optional)
Zero Point Adjusting Range:
Within 0 to ±10% of span
Span Adjusting Range:
Within 100 to 125% of span
Air Consumption:
4Nl/min maximum (for a supply air pressure of
140kPa)
Max. Air Delivery:
110Nl/min maximum (for a supply air pressure
of 140kPa)
Minimum Load Capacity:
1m copper tube with 4mm I.D. +20cc
Ambient Temperature:
-40 to 80°C (for general use)
-20 to 60°C (TIIS Explosionproof, TIIS
Intrinsically safe type)
-40 to 60°C (for FM Explosionproof, CSA
Intrinsically safe type)
Water Proof Construction:
IEC IP54
NEMA type 4X
Intrinsically Safe Construction:
CSA Intrinsically Safe (/CS1) :
Intrinsically Safe for Class I, Division 1,
Groups A, B, C & D Class II, Division 1,
Groups E, F & G and Class III, Division 1
Hazardous Locations.
Nonincendive for Class I, Division 2, Groups
A, B, C & D, Class II, Division 2, Groups F
& G, and Class III, Division 1 Hazardous
Locations.
Outdoor Hazardous Locations, Encl Type 4X.
Temperature Class: T4
TIIS Intrinsically Safe (/JS3):
Intrinsically Safe Ex ia IIC T4
Certificate: TC18266
三千控制阀网
www.cv3000.com
