Banner DUO-TOUCH Two-Hand Control Modules - Manual (Page 3)

P/N 47550 rev. E
3
DUO-TOUCH
® – Models AT-..M-2A Two-Hand Control Modules
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Appropriate Applications
The DUO-TOUCH Two-Hand Control Safety Module may be used as an initiation
device for most powered machinery when machine cycling is controlled by a machine
operator.
Using a two-hand control system makes the operator a “hostage” while the hazard
is present, thus limiting or preventing exposure to the hazard. The two-hand control
actuators must be located in a way that hazardous motion is completed or stopped
before the operator can release one or both of the buttons and reach the hazard (see
Separation Distance on page 6).
Simultaneous use of both hands is required, meaning that both buttons must be
actuated within a very short time span. The time span is specified by ANSI/RIA R15.06,
ANSI/NFPA79, and ISO 13851 (EN 574) as not more than 500 ms, even under single-
fault conditions. This requirement reduces the possibility of intentional defeat and
unintended initiation of the machine cycle.
When used in single-cycle or single-stroke mode, the machine control must provide
an anti-repeat feature so that the operator must release the two-hand control actuators
after each machine cycle, before a new cycle can be initiated.
The actuating devices must be protected from accidental or unintended operation. This
can be accomplished by their mounting position and/or through the use of protective
shields such as rings, guards or shields; see Figure 3.
NOTE: Two-hand control and two-hand trip safeguarding protect only the operator’s
hands. Additional safeguarding may be required. The user must refer to the
relevant standards for additional requirements for the application of two-hand
control and two-hand trip devices when used for safeguarding.
Part-Revolution Clutched Machinery
A two-hand control safety module can be used for the following functions: “inch”
(jog), “single-stroke,” or “continuous” (run). Two-hand control safety modules are
recognized as a means of protecting the machine operator when the hand controls
are safely located and protected from false operation (see Mechanical Installation on
pages 4-5 and Separation Distance on page 6) and when properly interfaced to the
machine (see Electrical Installation on page 7) to control the required stopping action.
Full-Revolution Clutched Machinery
A two-hand control safety module used to initiate the cycle of a full-revolution clutched
machine is known as a “two-hand trip device.” Two-hand trip devices are recognized
as a means of protecting the machine operator when the hand controls are safely locat-
ed and protected from false operation (see Mechanical Installation on pages 4-5 and
Separation Distance on page 6) and when properly interfaced to the machine (see
Electrical Installation on pages 6-7) to prevent accidental cycle initiation.
Figure 1. AT-..M-2A status indicators
CAUTION ... Not an
Anti-Repeat Control Device
Anti-repeat control is not
a function of the AT-..M-2A Two-Hand
Control Safety Module. The user of this
device must provide a suitable means of
anti-repeat control for any single-stroke or
single-cycle machines.
!
WARNING ...
Avoid Hazardous
Installations
The user has the
responsibility to satisfy all local, state,
and national laws, rules codes, and
regulations relating to the use of safety
equipment in any application. It is extremely
important to be sure that all appropriate
agency requirements have been met
and that all installation and maintenance
instructions contained in the appropriate
manuals are followed.
!
Power
ON Indicator
Fault
Indicator
K1 and K2
Energized
Indicators