I
Internal Lockout
A Lockout condition that is due to an internal safety
system problem. Generally, indicated by the red
Status indicator LED (only) flashing. Requires the
attention of a Qualified Person.
K
Key Reset (Manual Reset)
A key-operated switch used to reset a safety light
curtain system to Run mode following a Lockout
condition, or to enable machine operation following a
Manual Start/Restart (Latch) condition. Also refers to
the act of using the switch.
L
Manual Start/Restart (Latch) Condition
The safety outputs of a safety light curtain system
turn off when an object completely blocks a beam. In
a Manual Start/Restart condition, the safety outputs
stay off when the object is removed from the defined
area. To re-energize the outputs, perform a proper
manual reset.
Lockout Condition
A safety light curtain condition that is automatically
attained in response to certain failure signals (an
internal lockout). When a Lockout condition occurs,
the safety light curtain’s safety outputs turn OFF; the
failure must be corrected and a manual reset is
required to return the system to Run mode.
M
Machine Primary Control Element (MPCE)
An electrically powered element, external to the
safety system, which directly controls the machine’s
normal operating motion in such a way that the
element is last (in time) to operate when machine
motion is either initiated or arrested.
Machine Response Time
The time between the activation of a machine
stopping device and the instant when the dangerous
parts of the machine reach a safe state by being
brought to rest.
Minimum Object Sensitivity (MOS)
The minimum-diameter object that a safety light
curtain system can reliably detect. Objects of this
diameter or greater will be detected anywhere in the
defined area. A smaller object can pass undetected
through the light if it passes exactly midway between
two adjacent light beams. Also known as MODS
(Minimum Object Detection Size). See also
Specified
Test Piece
.
Muting
The automatic suspension of the safeguarding
function of a safety device during a non-hazardous
portion of the machine cycle.
O
OFF State
The state in which the output circuit is interrupted and
does not permit the flow of current.
ON State
The state in which the output circuit is complete and
permits the flow of current.
OSHA (Occupational Safety and Health
Administration)
A U.S. Federal agency, Division of the U.S.
Department of Labor, that is responsible for the
regulation of workplace safety.
OSSD
Output Signal Switching Device. The safety outputs
that are used to initiate a stop signal.
S4B Safety Light Curtain
56
www.bannerengineering.com - Tel: + 1 888 373 6767
