Proportional pressure controller
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Consult 'Precautions' page 94 before use, installation or service of MAC Valves.

Proportional pressure controller Introduction I. Introducing : Proportional Pressure Controller I or E Input signal The MAC Proportional Pressure Controller, (PPC) is an innovative product which converts an electrical signal into a proportional pneumatic output. The PPC is unlike conventional I/P or V/P transducers. It offers much more in terms of performance, features, and reliability. Inlet pressure The key to the MAC PPCs are two MAC 34, 45, 400, 47, 92 or 93 Series valves that are used to control the output pressure. The valves are operated by the PPCs closed loop electronic control...

Introduction III. Specifications LINEARITY The linearity parameter shows the capability of the unit to follow the input signal according to an ideal straight line curve. MAC PPCs exhibit excellent linearity throughout the pressure range. The deviation is measured in ± % of full scale. Input signal Output pressure Desired curve Actual curve For single transducer models, two parameters can be adjusted. Primarily these should be set by the factory but can be done in the field if absolutely necessary. The first parameter is the ZERO adjust, the second is the SPAN adjust. These parameters...

Proportional pressure controller Introduction HYSTERESIS The hysteresis error, sometimes called “deadband”, is the amount of output pressure variance required to cause the PPC to react, making a correction to the output pressure. It is given in percent of full scale pressure, all MAC PPC products perform with minimal hysteresis. MAC Valves states accuracy of the MAC PPCs as overall accuracy. Accuracy is expressed in percent of full scale, which includes hysteresis and linearity. Some suppliers give separate parameters in order to give a better impression. In this case hysteresis and...

Introduction IV. Command Signal Options The PPC can be controlled with either an analog command signal or a digital command signal. ANALOG COMMAND SIGNAL The analog command signal can be either 0 – 10 VDC (voltage) or 4 – 20 mA (current). Two wires are necessary to accept the command signal. The PPC measures the voltage differences between the two wires to determine the desired pressure output. Along with the command signals, a 24 VDC source must be available to operate the PPC. The return path for the 24VDC source and the return path for the command signal must not be isolated from each...

Proportional pressure controller Introduction Negative Logic is defined as a maximum command level (all bits are logic high) controlling a minimum pressure output. For example, in a 4-bit system, a 1111 digital signal would correspond to zero psi and a 0000 digital signal would correspond to the maximum pressure. Sinking Input requires the digital voltage to be supplied by the controller connected to the input of the PPC. A command signal must be supplied by the external controller to the digital input connections. The PLC "drives" the PPC, by which a digital input (as opposed to analog)...

The Logic Monitor Signal provides digital feedback to confirm that the PPC has achieved the correct pressure. The LMS provides standard logic levels such as TTL (5V) or 24 VDC. With the TTL option, when correct pressure is achieved, the LMS outputs a logic 1, (5 VDC). When the PPC is working, (Fill or Exhaust valve is in operation) the LMS outputs a logic 0, 0 VDC. Figure 2 shows how to wire the LMS to a controller’s TTL input. The LMS provides a simple "go/no go" signal back to the controlling device. The LMS may also be used to turn on an L.E.D. for remote indication. COMMON (GREEN) There...

Proportional Pressure Controller Consult “Precautions” page 94 before use, installation or service of MAC Valves

Proportional pressure controller Flow [Max] Cv / Nl/min Individual mounting coveriess covered ■ analog base ■ analog analog manifold base mount base moun covered covered analog covered analog with remote digital transducer coverless analog DIN rail mount Additional dimensions for PPC's P 89-93 Consult 'Precautions' page 94 before use, installation or service of MAC Valves.

Port size Flow [Max][Cv] Individual mounting 0.07 / 0.09 Covered Analog OPERATIONAL BENEFITS 1. Reliable operation, u-sing two MAC 34 Series with balcrced popper. 5. Lo^ power consumption. A. Rugged enclosure. 7. Not affected by vibrations. 6. Accurate pressure control, v. Can be sland alone or used in combination wilti our remote air sandwich regulators. 10. Analog command signal and output. BASIC MODEL Revision PRC5C (XXX -XX -XX) See below Porting SIDE PORTS 1/8" NPTF 1/8" BSPPL 1/8" BSPTR BOTTOM PORTS 1/8" NPTF 1/8" BSPPL 1/8" BSPTR Bottom port O-ring Mount r Q...

PNEUMATIC DATA * 30 PSI maximum inlet for 15 PSI output pressure - 2 BAR maximum inlet for 1 BAR output pressure -15 PSI maximum inlet for 2 PSI and 4 PSI output pressure - 1 BAR maximum inlet for 0.13 BAR output pressure ** Vacuum inlet should not exceed 25"/635 mm HG Consult 'Precautions' page 94 before use, installation or service of MAC Valves.

LIST OF AVAILABLE SIGNAL & CONNECTOR OPTIONS COMMAND SIGNAL DIFFERENTIAL NONE DIFFERENTIAL NONE DIFFERENTIAL NONE DIFFERENTIAL NONE DIFFERENTIAL NONE DIFFERENTIAL NONE DIFFERENTIAL NONE DIFFERENTIAL NONE DIFFERENTIAL NONE DIFFERENTIAL NONE DIFFERENTIAL NONE DIFFERENTIAL NONE Consult "Precautions" page 94 before use, installation or service of MAC Valves.

Proportional pressure controller STANDARD PLUG-IN - ELECTRICAL CONNECTIONS MATING CORD 1 COMMON 2 POWER +20.4 TO +26.4VDC 3 COMMAND GREEN RED WITH BLACK TRACER RED WITH WHITE TRACER - (BBA-BX) - (BAB-BX) - (DBA-BX) - (DAB-BX) 2 ANALOG MONITOR SIGNAL RED 4 LOGIC MONITOR SIGNAL ORANGE 5 MICRO (SINGLE ENDED) RED WITH WHITE TRACER RED GREEN RED WITH YELLOW TRACER RED WITH BLACK TRACER - (BBA-EX) - (BAB-EX) - (DBA-EX) - (DAB-EX) RED WITH WHITE TRACER RED GREEN RED WITH YELLOW TRACER RED WITH BLACK TRACER 6 1 LOGIC MONITOR SIGNAL ORANGE 5 ANALOG MONITOR SIGNAL RED + COMMAND...