The SIPART PS2 positioner is used worldwide on all pneumatic actuators, in all applications and industries:

• Chemical industry
• Petrochemical industry
• Oil and gas
• Water/wastewater industry
• Power supply
• Pharmaceutical industry
• Food, beverage and tobacco industries

The devices are available in variants for:

• 4 to 20 mA
• HART communication
• PROFIBUS PA communication
• FOUNDATION Fieldbus (FF) communication
• Single-and double-acting valves in various enclosure designs and various materials (polycarbonate, aluminum and stainless steel)
• Applications without explosion protection requirements
• Hazardous applications in the versions:
  • Device protection with intrinsic safety (Ex i)
    for use in Zone 1, 2, 21, 22 or Class I, II, III/Division 1/Groups A-G
  • Device dust ignition protection by enclosure (Ex t)
    type of protection for use in Zone 21, 22 or Class II, III/Division 1/Groups E-G
  • Device protection with increased security (Ex e)
    for use in Zone 2 or Class I, Division 2, Groups A-D
  • Device protection with flameproof enclosure (Ex d)
    for use in Zone 1 or Class I, Division 1, Groups A-D

Stainless steel enclosure for extreme ambient conditions

The SIPART PS2 is available in a stainless steel enclosure for use in particularly aggressive environments (e.g. offshore operation, chlorine plants). The device functionality is not different due to the enclosure variants.

• Base plate with lid with/without inspection window, depending on the variant
• Electronics with screw-type terminals:
  • 4 to 20 mA
  • 4 to 20 mA with HART
  • PROFIBUS PA according to IEC 61158‑2, bus-supplied
  • FOUNDATION Fieldbus (FF) according to IEC 61158‑2, bus-supplied
• Position feedback via potentiometer or non-contacting sensor (NCS)
• Pneumatic block

The pneumatic connections for supply air and actuating pressure are located on the right side of the enclosure. A gauge block, venting gauge block, booster, VDI3847 interface or a safety solenoid valve can be connected there as options. The SIPART PS2 positioner is fitted to the linear or part-turn actuator using an appropriate mounting kit.

Optional expansion with modules and functions

Optionally, SIPART PS2 can be expanded with the following modules and functions:

Analog Output Module (AOM)

Analog position feedback 4 to 20 mA.

Digital I/O Module (DIO) with 3 digital outputs and 1 digital input

• Signaling of two limits of the travel or angle. The two limits can be parameterized independently as maximum or minimum values.
• Output of an alarm if the setpoint position of the final control element is not reached in automatic mode or if a device/valve fault occurs.
• 2nd digital input for alarm signals or for triggering safety reactions, e.g. hold position or approach safety position.

Inductive Limit Switches (ILS)

Via the inductive switches, 2 independent limits can be set and monitored as NAMUR signal (EN 60947‑5‑6). The module also contains an integrated fault indicator (see “Digital I/O Module (DIO)”).

Mechanic Limit Switches (MLS)

2 independent limits can be monitored via the mechanical switches. The module also contains an integrated fault indicator (see “Digital I/O Module (DIO)”).

Valid for all modules described above:

• All signals are electrically isolated from one another and from the basic unit. The outputs indicate self-signaling faults. The modules are easy to retrofit.

Configuring

The SIPART PS2 positioner contains the following configurations:

• Input current range 0 to 20 mA or 4 to 20 mA
• Rising or falling characteristic curve at the setpoint input
• Positioning speed limit (setpoint ramp)
• Split-range mode: Adjustable start-of-scale and full-scale values
• Response threshold (deadband); self-adjusting or fixed
• Direction of action: Rising or falling output pressure with rising setpoint
• Limits of position range, start-of-scale/full-scale value
• Thresholds (alarms) of the process valve position: Minimum and maximum value
• Automatic tight closing stroke adjustment in accordance with the valve process characteristic curve
• Function of the digital inputs