Contents Overview Section Page The PAX1 Motor Set Pressure Regulator is a flexible linear actuator coupled to Fairchild Overview precision pressure regulators and capable of controlling pressure ranges of 0-0.5 psig to General Information 0-3000 psig all housed in a flameproof enclosure. Installation The unit is inherently lock in last place as the Electrical Connections, DC Power...
General Information FM Hazardous Area Conditions of use The PAX1 Motor Set Pressure Regulator described in this document has been designed and manufactured with state • Hazardous locations wiring must comply with of the art technology. All components are subject to stringent ANSI/NFPA 70 (NEC ®...
General Information Installation continued Hazardous Area (Classified) Conditions of use The PAX1 can be mounted in any position without affecting its operation. It can be mounted to a flat surface using the • Under certain extreme circumstances, the non-metallic mounting holes on the actuator. An optional mounting parts incorporated in the enclosure of this equipment bracket is also available.
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Installation continued Wiring Power Supply Sizing The PAX1 can be controlled with three different control For 12 VDC operation, the recommended power supply interfaces (Analog, Pulse & Modbus). The wiring diagrams, should have 2 amp capacity minimum. Figures 3-8, below show the connections required to operate For 24 VDC operation, the recommended power supply the unit based on the control type as well as connections to should have 1 amp capacity minimum.
Electrical Connections, DC Power mA + ANALOG PULSE CONTROL CONTROL mA - LOOP EXTERNAL LOOP SUPPLY B(+) RS-485 A(-) FEEDBACK DC POWER Internal connection of RS-485 GND NO/ISOLATE switch. Set to ISOLATE DC POWER SUPPLY Switch set SW2 Isolation Switch to PULSE set to “Isolate”...
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Electrical Connections, DC Power continued mA + ANALOG External loop supply for PULSE CONTROL CONTROL Isolated Feedback Loop mA - LOOP B(+) RS-485 EXTERNAL LOOP SUPPLY A(-) FEEDBACK DC POWER RS-485 GND MILLIAMMETER DC POWER SUPPLY Figure 6 Power and Feedback Connections mA + ANALOG PULSE...
Electrical Connections, AC Power mA + ANALOG PULSE CONTROL mA - CONTROL LOOP EXTERNAL LOOP SUPPLY B(+) RS-485 A(-) FEEDBACK AC POWER RS-485 GND AC POWER SOURCE Switch set SW2 Isolation Switch to PULSE set to “Isolate” Figure 8 Electrically isolated pulse input control using an external loop supply mA + 4-20 mA CONTROLLER ANALOG...
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Electrical Connections, AC Power continued ALARM SW Alarm Indicator Power Supply ALARM SW Figure 11 Alarm Switch Connections...
User Interface Setup switch Eight position rotary SETUP switch, for setting control type and configuring travel limits, Alarm points and Feedback calibration. Configuration DIP switches SW1 selects 4-20 mA for analog control input or Modbus communication control. SW2, Isolate: The Pulse control inputs are isolated from the DC power supply providing power to the unit and must be powered from a separate external power source.
Commissioning 2. Setting Analog Control Current WARNING Connect a 4-20 mA signal source to the 4-20 mA NOTE: multiple power sources possible. Do not remove input terminals. cover in the field without first removing all power from the unit. Turn on power to the unit. Commissioning must be done in a safe area before Set SW1 to 4-20 mA.
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Commissioning continued 3. Setting Alarm Switches 5. Manual adjustment of Pressure Regulator Position the SETUP SWITCH to the ALARM SWITCH WARNING LO setting. Manual adjustment must only be done when power is Using the UP (EXTEND) and DN (RETRACT) buttons, removed from the unit.
Specifications Electrical Supply (DC) Customer interface Power Supply Voltage 11-30 VDC Electrical Connections Screw terminal block under cover, 14-30 AWG Power Consumption 22 W max, <1.5 W standby Actuator speed Multi-turn pot, 1.2 – 60 mm/min* Electrical Supply (AC) Limit adjustments Push button switch to accept Power Supply Voltage 95-250 VAC, 47-63 Hz current thrust rod position for (2)
Maintenance CAUTION Shutting off Motor Set Pressure Regulator and disconnecting associated equipment can cause dangerous system conditions to exist. Ensure the System is properly prepared for maintenance to be performed on the unit before taking it out of service. Periodic lubrication of Thrust Rod After 20,000 operating cycles, re-lubricate the actuator thrust rod.
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US-WS-CS@rotork.com As part of a process of on-going product development, Rotork reserves the right to amend and change specifications without prior notice. Published data may be subject to change. For the very latest version release, visit our website at www.rotork.com PUB136-003-00 The name Rotork is a registered trademark.
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