Siemens SIPART PS2 — technical data
- Manufacturer: Siemens
- Type: electropneumatic positioner (I/P positioner)
- Input signal: 4–20 mA (standard), 4–20 mA + HART (variant)
- Position sensing: NCS (Non-Contact Sensing) — wear-free
- Actuator type: single-acting (spring return) or double-acting
- Pneumatic connection: G ¼
- Electrical connection: M20 × 1.5
- Housing: polycarbonate (standard), stainless steel or aluminium
- Protection: IP66/IP67 (housing dependent)
- Explosion protection: Ex i, Ex e, Ex d, Ex t (optional)
- Functional safety: SIL 2 to IEC 61508 (optional)
- Fail-safe: actuator moves to defined safety position on power loss
- Option: AOM (Analog Output Module) for 4–20 mA position feedback
- Mounting: to VDI/VDE 3845 (NAMUR) with mounting kit 6DR4004-8D
Single-acting vs. double-acting — which SIPART PS2?
| Feature | Single-acting | Double-acting |
|---|---|---|
| Principle | air opens, spring closes (or reverse) | air in both directions |
| Fail-safe | actuator returns to spring position on power loss | lock-in-place or defined position via memory |
| Typical use | safety valves, control valves | process valves with high forces, fast switching |
| Standard (no HART) | 6DR5010-0NG00-0AA0 | 6DR5020-0NG00-0AA0 |
| With HART | 6DR5110-0NG00-0AA0 | 6DR5120-0NG00-0AA0 |
| Standard + AOM | 6DR5010-0NG01-0AA0 | 6DR5020-0NG01-0AA0 |
| HART + AOM | 6DR5110-0NG01-0AA0 | 6DR5120-0NG01-0AA0 |
For safety valves with a defined fail position choose the single-acting version. For process valves with high actuating forces and fast switching times choose the double-acting version. Both are available with and without HART and with AOM feedback module (4–20 mA).
NAMUR mounting kit for rotary actuators (6DR4004-8D)
The mounting kit 6DR4004-8D enables standard-compliant installation of the Siemens SIPART PS2 on pneumatic quarter-turn actuators to VDI/VDE 3845 (NAMUR). The plastic coupling wheel transmits the rotary movement precisely. The mounting kit is ordered separately — the mounting bracket is required in addition. For a complete package with NAMUR solenoid valves and limit switch boxes, Fergo supplies everything from one source.
Diagnostics and predictive maintenance
The SIPART PS2 continuously records diagnostic data during operation — without external sensors. The device logs stroke counts, direction changes and response behaviour. When these values shift, the positioner flags an anomaly — often well before an unplanned shutdown. This predictive maintenance replaces fixed maintenance intervals with condition-based servicing. Analysis runs via SIMATIC PDM or via HART protocol in the existing asset management system.
Applications — chemicals, pharma, power plants and water treatment
The Siemens SIPART PS2 suits any industry where pneumatic actuators need precise control. In chemical and petrochemical plants the positioner drives control valves and bellows-sealed globe valves on aggressive media. In pharmaceutical and food processing the NCS technology delivers maintenance-free, hygienic position control. In power plants and steam systems the fail-safe function secures the valve on power loss. In water and wastewater plants the SIPART PS2 controls pneumatic butterfly valves and control valves precisely even under fluctuating conditions.
SIPART PS2 in stock — EU-wide delivery
Fergo stocks all 9 Siemens SIPART PS2 variants — original packaging with full Siemens documentation. Delivery in 1–2 weeks across Europe. Fergo supplies the electropneumatic positioner individually or as a complete actuator package with pneumatic quarter-turn actuator, NAMUR solenoid valve and limit switch box. For actuator sizing or interface questions the technical team is available directly.



