Pasco - Model SS2 Linear / Rotary -Smart Valve Positioner

• Easy and quick auto-calibration
• Detecting RA (reverse acting) or DA (direct acting) automatically regardless of wrong air connections
• Available to use for single or double acting without any special adjustments
• Compact design allowing to be installed on small actuators
• Providing error messages against performance failures
• Possible to test the actuator with any fixed signal under a test mode
• Programmable characteristic curve with 17 points
• Wide operating temperature range -30 ~ +80°C;
• Improved control of high-friction globe and ball valves by eliminating an overshoot and a hunting
• Low air consumption
• Providing a mounting bracket to meet IEC 60534-6-1 for linear valves
• Supporting a NAMUR mounting pattern VDI/VDE 3845 (IEC 60534-6-2) and providing a multi-size mounting bracket for rotary valves

• Output position transmitter (4 - 20 mA)
• 2 x alarm limit or micro switch (SPDT)
• Explosion proof type (lECEx / ATEX / KC Ex ia IIC T5)
• HART communication
• Profibus communication (in progress)
• Fieldbus Foundation communication (in progress)

If 4-20 mA input signal is supplied, the micro processor compares input signal with position feedback and sends control signal to the I/P converting module. Pneumatic signal from the l/P converting module operates the valve and the valve stays at the desired position.