Overview, 1 functional description, 2 standard specifications – Yokogawa PK200 User Manual

Page 10: Overview -1, Functional description -1, Standard specifications -1

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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

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