Banner MMD-TA-11B Muting Modules - Manual (Page 54)

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P/N 116390 rev. C
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
MMD-TA-11B / MMD-TA-12B Muting Module
Instruction Manual
Glossary of Terms
ANSI (American National Standards Institute): the American
National Standards Institute, an association of industry
representatives that develops technical standards (including
safety standards). These standards comprise a consensus
from a variety of industries on good practice and design. ANSI
standards relevant to application of safety products include
the ANSI B11 Series, and ANSI/RIA R15.06. See “Safety
Standards” on inside back cover.
Auto Power-Up: a safety light screen system feature which,
when switched ON, enables the system to be powered up
(and recover from a power interruption) without requiring a
manual reset. When Auto Power-Up is ON, the safety light
screen controller automatically begins internal diagnostics upon
power-up, and automatically resets the system if it passes the
diagnostic check. When Auto Power-up is OFF, a manual reset
is required.
Blocked Condition: A safety light screen condition, when an
opaque object of sufficient size blocks/interrupts one or more
light screen beams. When a Blocked condition occurs, OSSD1
and OSSD2 outputs simultaneously turn off within the system
response time.
Brake: a mechanism for stopping or preventing motion..
Clutch: a mechanism that, when engaged, transmits torque to
impart motion from a driving member to a driven member.
Control Reliability: A method of ensuring the performance
integrity of a control system. Control circuits are designed and
constructed so that a single failure or fault within the system
does not prevent the normal stopping action from being applied
to the machine when required, or does not create unintended
machine action, but does prevent initiation of successive
machine action until the failure is corrected.
CSA: Canadian Standards Association, a testing agency similar
to Underwriters Laboratories, Inc. (UL) in the United States. A
CSA-certified product has been type-tested and approved by
the Canadian Standards Association as meeting electrical and
safety codes.
Defined Area: the “screen of light” generated between the
emitter and receiver of a safety light screen system. When the
defined area is interrupted by an opaque object of a specified
cross section, a Trip or Latch condition results.
Designated Person: an individual identified and designated
in writing, by the employer, as being appropriately trained
and qualified to perform a specified checkout procedure. (See
Qualified Person.)
Emitter: the light-emitting component of a safety light screen
system, consisting of a row of synchronized modulated LEDs.
The emitter, together with the receiver (placed opposite),
creates a “screen of light” called the defined area.
External Device Monitoring (EDM): a means by which a
safety device (such as a safety light screen) actively monitors
the state (or status) of external devices that may be controlled
by the safety device. A lockout of the safety device will
result if an unsafe state is detected in the external device.
External device(s) may include, but are not limited to: MPCEs,
mechanically linked relays/contactors, and safety modules.
Failure to Danger: a failure which delays or prevents a machine
safety system from arresting dangerous machine motion.
Final Switching Device (FSD): the component of the machine’s
safety-related control system that interrupts the circuit to the
machine primary control element (MPCE) when the output signal
switching device (OSSD) goes to the OFF-state.
FMEA (Failure Mode and Effect Analysis): a testing
procedure by which potential failure modes in a system are
analyzed to determine their results or effects on the system.
Component failure modes that produce either no effect or a
Lockout condition are permitted; failures which cause an unsafe
condition (a failure to danger) are not. Banner safety products
are extensively FMEA tested.
Forced-Guided Contacts: relay contacts that are mechanically
linked, so that when the relay coil is energized or de-energized,
all of the linked contacts move together. If one set of contacts
in the relay becomes immobilized, no other contact of the
same relay will be able to move. The function of forced-guided
contacts is to enable the safety circuit to check the status of
the relay. Forced-guided contacts are also known as “positive-
guided contacts,” “captive contacts,” “locked contacts,” or “safety
relays.”
Guarded Machine: The machine whose point of operation is
guarded by the safety light screen system.
Hard Guard: screens, bars, or other mechanical barriers
affixed to the frame of the machine intended to prevent entry
by personnel into the hazardous area(s) of a machine, while
allowing the point of operation to be viewed. The maximum
size of openings is determined by the applicable standard, such
as Table O-10 of OSHA 29CFR1910.217, also called a “fixed
barrier guard.”
Hazardous Area: an area that poses an immediate or
impending physical hazard.
Glossary of Terms