Specifications
e October
Connection 8 2014
Introducing the New 440G-LZ
Guard Locking Switch
Rockwell Automation has released a new
member to their guard locking switch fam-
ily. It is the GuardMaster 440G-LZ. Before
we get into the features and benets of this
switch, let’s discuss the applications for
guard locking switches.
Why use a guard locking switch?
Guard locking switches are
used to protect hazardous
areas where a danger is not
immediately removed after
a stop request. On many
machines, removal of power
from the motor or actuator
will not necessarily cause
a reliable and immediate
stopping of the dangerous
motion. Typical applications
are: high inertia rotating
machines, fast rotating ma-
chines, and machines where
high pressure needs to be
released from pneumatic
valves.
Gates protected with guard locking switch-
es are usually opened on exception basis.
For example: to clear a jam or to regularly
maintain the machine. This type of switch
should not be used for frequent access
during normal operation of the machine.
By: Mike Barringer - Account Manager - Saginaw, MI
Guard locking switches use a solenoid to
activate a lock which blocks or releases the
tongue from the switch.
Rockwell Automation offers two different
types of guard locking switches:
Power to Lock
When power is applied to the solenoid, the
tongue is locked in the switch. When power
is removed, the lock is released allowing the
tongue to be extracted from the switch.
Power to Release
When power is applied to the solenoid the
lock is released allowing the tongue to be
extracted from the switch. When power is
removed, the tongue is locked in the switch.
440G-LZ
The new 440G-LZ is a guard-locking inter-
lock switch. Its locking bolt extends into the
actuator only when the correct actuator is
detected. It has 2 OSSD SS outputs that are
enabled with the locking bolt is extended into
the actuator.
Features
• Certied to PLe to EN/ISO 13849-1
(both for door position and lock monitor-
ing to EN/ISO 14119)
• Solid-state design and monitored
outputs
• Scalable protection with unique or
standard coded RFID actuators
• High holding force of 1,300 N (Fzh)
• Energy efcient green device that only
uses 2.5 W
• IP69k and hygienic design
• Power-to-release and power-to-lock
versions
• Compact design optimized for ease of
mounting
• Diagnostic information provided by two
bright 270° LEDs
• Solid-state OSSD outputs series con-
nectable to EN/ISO 14119:2013
Contact your Kendall Electric Account
Manager for additional information.
Linear Actuators
By: Larry Flanery
Account Manager
Saginaw, MI
Most people think of Kendall Electric as their supplier of all things electrical for their industrial, commercial & residen-
tial needs. Many of these same people don’t realize that Kendall also offers a wide variety of mechanical solutions.
Today I’d like to highlight one of manufactures that was born & made in the USA.
E•DRIVE actuators are designed, manufactured, tested, and serviced in West Hartford, CT. Founded in 1980, E•DRIVE Design, Inc.
initially developed a wide variety of heavy duty ball screw linear actuators, targeting the machine tool retrot market.
Over the years E•DRIVE Design's business has grown based on their philosophy of design exibility and rapid response to their custom-
ers' needs. As the machine tool market declined, E•DRIVE's unique steel construction and long life have attracted new markets, namely
factory automation, and more specically the replacement for hydraulic and pneumatic linear actuators. E•DRIVE's business has contin-
ued to grow as the demands for improved control over linear motion have increased.
From the very beginning, E•DRIVE customers have enjoyed an unsurpassed commitment
to superior quality, integrity, and customer service. E•DRIVE now offers a standard ve year
warranty, showing their trust and belief in their superior designs and construction. If you
need help with your design or product application support, Kendall Electric’s or E•DRIVE's
experienced staff will provide as much technical support as needed.
Please contact your Kendall Electric Account Manager for additional information.