1. General Introduction
Yokogawa PK200 current-to-pneumatic converter converts a analog signal input to a proportional pneumatic air pressure output. It's designed for a broad range of process control applications, including pneumatic actuating equipment, comes with built-in stainless steel input/output gauges, performs electronic feedback control while maintaining accuracy of ±0.5 percent of span and linearity of ±0.2 percent of span. PK200 is used mostly to actuate diaphragm operated valves, air cylinder operated valves, power cylinders or other terminal elements. Beside these, itcan also be used as a simple signal converter in hybrid instrumentation comprising electronic and pneumatic instruments.
2. General Specification
Output | 20 to 100kPa, 0.2 to 1.0 kgf/cm2, 0.2 to 1.0 bar, 3 to 15 psi |
Auto/Manual (A/M) Transfer Switch | Mounted on front of housing, in manual mode, output signal varied by adjusting the external supply pressure regulator. |
Zero Adjustment | Continuously adjustable, externally set. Approximate ±10% of span. |
Span Adjustment | Continuously adjustable. Adjustable range; Approximate 100 to 125% of span. |
Air Consumption | Max. 4 Nl/min. or 0.24 Nm3/hr at 140 kPa (20 psi) air supply pressure. |
Output Air Capacity | Max. 110 Nl/min. or 6.6 Nm3/hr at 140 kPa (20 psi) air supply pressure |
Operating Temperature Limits | –40 to 80°C (–40 to 176°F) |
Housing and Cover Material | Cast aluminum alloy, finished with polyurethane paint. |
3. Model selection
Model | Suffix Codes | Description | ||
PK200 | Current-to-Pneumatic Converter | |||
Input signal | -A | 4 to 20 mA DC | ||
-C | 4 to 20/10 to 50 mA DC changeable type | |||
Output signal | 1 | Output signal: 20 to 100 kPa, Gauge scale: 0 to 200 kPa | ||
2 | Output signal: 40 to 200 kPa, Gauge scale: 0 to 400 kPa | |||
3 | Output signal: 0.2 to 1 kgf/cm2, Gauge scale: 0 to 2 kgf/cm2 | |||
4 | Output signal: 0.4 to 2 kgf/cm2, Gauge scale: 0 to 4 kgf/cm2 | |||
5 | Output signal: 0.2 to 1 bar, Gauge scale: 0 to 2 bar | |||
6 | Output signal: 0.4 to 2 bar, Gauge scale: 0 to 4 bar | |||
7 | Output signal: 3 to 15 psi, Gauge scale: 0 to 30 psi | |||
8 | Output signal: 6 to 30 psi, Gauge scale: 0 to 60 psi | |||
9 | Output signal: 3 to 27 psi, Gauge scale: 0 to 60 psi | |||
Connections | 1 | Air connection: Rc1/4, Electric connection: G1/2 female | ||
2 | Air connection: Rc1/4, Electric connection: G 3/4 female | |||
3 | Air connection: 1/4 NPT female, Electric connection: 1/2 NPT female | |||
4 | Air connection: 1/4 NPT female, Electric connection: 3/4 NPT female | |||
Optional codes | /Optional codes | |||
4. Dimension Drawings
