Data Sheet for Product

Technical Specification Sheet
Document No. 149-398
September 15, 2008
Document No. 149-398
Page 1 of 2
LA546 Laboratory Electronic Actuator
Figure 1. Laboratory Electronic Acutator.
Description
The Laboratory Electronic Actuator is designed to
work in airflow applications where rapid movement of
the damper actuator is required for control of
pressurization of the space. Typical applications
include fume hood damper actuation and room
pressurization control.
Features
Maintenance free high speed actuator
Accepts industrial standard analog control signals
(0-10Vdc, 4-20mA) as well as the proprietary
Siemens Fume Hood Controller pulsed signal
Power failure options: hold in last position or fail-
safe Normally Open / Normally Closed
Selectable fail-safe action: retract, extend
NEC Class 2 with Isolated Interface Board
Manual override at the interface board
Actuator protection with integral current sensing
45 , 60 and 90 rotation angles
Assembly available in Galvanized enclosure
suitable to mount on 90° rotation terminals.
Application
LA 546 laboratory electronic damper actuators are
designed specifically for applications in critical
environments where rapid response to change in
pressurization is required. This includes operation of
the exhaust dampers in terminal units and venturi air
valves for fume hoods as well as supply and exhaust
units for room pressurization.
The actuator is offered with two selectable control
inputs. One is “floating” or “3-position”, using two
digital 24Vac input signals to extend, retract or hold
position. The other uses a modulated 0-10Vdc or 4-
20mA input control signal. Choose control signal to
match the output signal of the controlling device. The
actuator is offered for linear stroke and with mounting
bracket and crank arms for 45 , 60 or 90 rotation.