Yokogawa PK200 - Manual (Page 10)

IM 21B03D01-01E 2-1
2. OVERVIEW
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 Fig. 2.1
Constant
Voltage
Circuit
50 Ω MAX
Input Signal
4 to 20mA DC
5V DC
(8V DC for CENELEC
Intrinsically safe type and
TIIS Intrinsically safe type.)
F0201.EPS
Fig. 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)
T0200.EPS
Output Signals:
Pa calibration 20 to 100kPa 0 to 200kPa 40 to 200kPa 0 to 400kPa 130 to 150kPa 0 to 200kPa
230 to 260kPa 0 to 400kPa
kgf/cm 2 calibration 0.2 to 1.0 kgf/cm 2 0 to 2kgf/cm 2 0.4 to 2.0 kgf/cm 2 0 to 4kgf/cm 2 1.3 to 1.5kgf/cm 2 0 to 2kgf/cm 2
2.3 to 2.6kgf/cm 2 0 to 4kgf/cm 2
Bar calibration 0.2 to 1.0bar 0 to 2bar 0.4 to 2.0bar 0 to 4bar 1.3 to 1.5bar 0 to 2bar
2.3 to 2.6bar 0 to 4bar
P calibration 3 to 15psi 0 to 30psi 6 to 30psi 0 to 60psi 19 to 22psi 0 to 30psi
3 to 27psi 33 to 37psi 0 to 60psi
Output Signal
Recomended
Supply Air
Pressure * 1
Supply Air
Pressure Gauge
Scale * 1
Standard Output
Output Signal
Pressure Gauge
Scale
Output Signal
Pressure Gauge
Scale
Doubled Output
*1: Set supply air pressure in the range given in the upper column for standard output and in the range given in the lower column for
multiplied pressure output.
T0201.EPS
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