Appropriate applications – Banner DUO-TOUCH SG Two-Hand Control Safety Modules User Manual

Page 3

Appropriate Applications

M11 M12 M21 M22

S12

B1 B2

13 14

S11

S13

Y30 Y31 Y32 Y33

S21

S22

S23

Powe r

Faul t

Input 1

Input 2

SSI

Mutin g

Output

Power ON

(green)

Input 1 Status

(green)

Internal Fault

(red)

Input 2 Status

(green)

Output Status

(green)

Mutin g

(green )

SSI

(green )

Figure 1. AT-xM-11KM Status Indicators

The DUO-TOUCH SG Two-Hand Control Safety Module may be used as an ini-
tiation 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 haz-
ard 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 9).

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 intention-
al defeat and unintended initiation of the machine cycle.
When used in single-cycle or single-stroke mode, the machine control must pro-
vide 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. In addi-
tion to the anti-repeat of the machine control, the mute inputs (M1 and M2), the
Safety Stop Interface (SSI), or Backdoor Timer also may be used to halt a ma-
chine cycle.

CAUTION: Machine Control Must Provide Anti-Repeat Control
Appropriate anti-repeat control must be provided by the machine control and is required by U.S.
and International standards for single-stroke or single-cycle machines.
The AT-..M-11KM DUO-TOUCH SG Two-Hand Control Safety Module can be used to assist in accom-
plishing anti-repeat control, but a risk assessment must be accomplished to determine the suitability of
such use.

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 6. Install activation devices so that they are

protected to prevent defeat or inadvertent actuation (STB Touch Buttons shown)

on page 8 and

SG Mechanical Installation

NOTE: Two-hand control and two-hand trip safeguarding protect only the operator’s hands. Additional safe-
guarding 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.

“Muting” of the two-hand control can only occur during a non-hazardous portion of the machine cycle. When the hand controls are muted,
the operator’s hands may be removed from the devices, but the Safety Module’s outputs remain closed.
A mute cycle can be initiated after the Safety Stop Interface (SSI) is closed and the two-hand control buttons are activated. After the Mute
Enable input closes, M1 and M2 can close (within the 3-second simultaneity requirement), then the Module will start a mute cycle, light
the mute lamp, and latch the outputs ON. The outputs will remain ON until M1 or M2 opens, the SSI opens, the backdoor timer expires, a
lockout occurs, or the Module loses power.

WARNING: Muting Limitations
Muting is allowed only during the non-hazardous portion of the machine cycle.
A muting application must be designed so that no single component failure can prevent the stop
command or allow subsequent machine cycles until the failure is corrected (per OSHA 1910.217(c)
(3)(iii)(d), and ANSI B11.19).

DUO-TOUCH® SG Two-Hand Control Modules

P/N 109782 Rev.B