Siemens SIPART PS2 Service Manual

Troubleshooting Procedures
3.15 Loose or Worn Linkage
PS2 Troubleshooting Guide
30 Service Manual, 03/2017, A5E36661550-AA
● Flameproof enclosures on rotary actuators require the black-wheel coupler design, not
the SST coupler.
Figure 3-1 FlameProof coupler and SST coupler
● Unscrew cap from PS2 enclosure.
● Locate the internal input shaft, see image below.
● Put PS2 in Manual mode- from Auto mode press
button once.
● Using the
and/or buttons move the valve back and forth in both directions.
● While the valve is moving back and forth inspect the movements of:
– For Rotary: Actuator shaft, Positioner coupling, Positioner input shaft, and Internal
Star Linkage.
– For Linear: Actuator shaft, Actuator stem coupling, Feedback pin, Feedback arm,
Positioner input shaft and Internal Star Linkage.
● All of these components must move in unison, all together.
– Several back and forth movements will be necessary to identify the loose component.
● If a mechanical component does not move together with the other components, secure
component with the supplied hardware, i. e. set-screw for rotary couplers.
● Re-initialize PS2 if any adjustments are made; see Initialization Procedure (Page 50).

Siemens SIPART PS2 Specifications

General

Supply Pressure	1.4 to 7 bar (20 to 100 psi)
Enclosure Rating	IP66/NEMA 4X
Communication Protocols	HART, PROFIBUS PA, FOUNDATION Fieldbus
Output Pressure	0 to 100% of supply pressure
Hazardous Area Certification	ATEX, IECEx, FM, CSA
Type	Electropneumatic
Input Signal	4-20 mA
Rotation Angle	30° to 90°
Operating Temperature	-40°C to +80°C
Mounting	Linear and rotary actuators
Air Consumption	Typically less than 0.1 kg/h