Data Sheet for Product

Technical Specification Sheet
Document No. A6V11775657
March 4, 2020
Siemens Industry, Inc.
Page 1 of 7
A-Series Industrial Electric Actuator
(600 to 18,000 lb-in)
Description
The A-Series quarter-turn industrial electric actuator
features a compact, reliable design that mounts
directly to Siemens resilient seat butterfly valves
without the need for brackets and linkages. Available
in torque outputs from 600 to 18,000 lb-in (68 to 2,033
Nm), 24V and 120 Vac, Two-position (On/Off) and
Modulating units all in NEMA 4x and IP65-rated
housings.
Features
• Compact, lightweight design and direct mounting
• High visibility Beacon position indicator
• Manual, declutchable override handwheel
• Terminal strip for cable terminations
• Servo NXT option for modulating control
• Travel limit cams adjustable by hand or
screwdriver
• UL-approved (120 Vac only)
• On/off or modulating control
• Available in 120, 24 Vac 50/60 Hz, single-phase,
24 Vdc voltages
• Output torque 600 lb-in (68 Nm) to 18,000 lb-in
(2,033 Nm)
• ISO 5211 for direct mounting
• All actuators include a heater to prevent
condensation build-up
• All modulating units include a feedback
potentiometer
Servo NXT Features
(for Modulating Actuators)
• Provides precise modulating control of valve
position
• Single Finger Technology (SFT) menu driven,
pushbutton, programming with LED confirmation of
all settings:
o Input Control – 4 to 20 mA, 0 to 10 Vdc, 0
to 5 Vdc or 2 to 10 Vdc
o Position Feedback – 4 to 20 mA, 0 to 10
Vdc, or 0 to 5 Vdc
o Auto Calibrating
o Fail Position:
▪ Loss of supply power - fail-in-place
▪ Loss of control signal - selectable
o Adjustable Speed Control
• Including:
o Manual mode
o Onboard signal generator to simplify field
set-up
o Fault display – Simplifies troubleshooting
o Stall detection – Eliminates mechanical
damage in case of obstruction or bad
switch settings
• Optical isolation of all inputs/outputs
o Provides interoperability with all controllers
o Earth ground tolerant
o Allows for parallel operation
Applications
These actuators are ideal for use on valves for chillers,
cooling towers, boilers, heat exchangers and other
outdoor applications. The actuators’ advanced
electronics assure reliable compatibility with virtually
any analog control signal used in today’s building
automation and temperature control systems.