Link Lite 305
Black Max
User Requirements
Installation Information
Operating Instructions
Black Max
LINK ELECTRIC & SAFETY CONTROL COMPANY
444 McNALLY DRIVE, NASHVILLE TN 37211
PH (615)-833-4168 FAX (615)-834-1984
MANUAL
INCLUDES
SECTIONS
1,3, &4
Link Lite Black Max Section 1 - User Requirements
1. IMPORTANT REQUIREMENTS
AND RESPONSIBILITIES THAT
THE USER/EMPLOYER MUST
MEET WHEN USING LINK LITE
BLACK MAX LIGHT CURTAINS
The Link Lite Black Max light curtain is a
presence sensing device whose most
common use is to enhance protection of
personnel from point of operation hazards
on industrial machinery. A light curtain
performs the simple function of a light
activated switch that can be used to
provide a signal as to whether something
or someone is in the sensing field between
its transmitter and receiver units. It
cannot, as a stand alone component,
provide personnel safety enhancement or
other function. Only when a light curtain
is properly applied, installed, adjusted, and
used as a component of a production
system whose other components also meet
the requirements for use of a light curtain
does it act, in conjunction with other
components of the system, to enhance
personnel safety. Because only the user
/employer has continuous knowledge and
control over all elements of production
system design and use (and attendant
hazards), both OSHA regulations and
ANSI standards assign the employer the
responsibility for providing and insuring
the use of properly applied and adjusted
point of operation safeguarding.
1.1. Machine and Machine Control
Construction Requirements
All light curtains depend on the electrical,
mechanical, pneumatic, and/or hydraulic
control components and drive systems of
the machine to stop hazardous motion
when the light curtain gives a stop signal
to the machine control. If machine control
components or drive systems fail to
function properly, the machine may fail to
stop, or may not stop quickly, even though
the Black Max is functioning properly.
Install Black Max light curtains for
safeguarding only on machines or
production systems that meet the
following requirements.
The machine construction must comply
1.
with any applicable OSHA or ANSI
standards for such a machine.
The machine design and construction
2.
must allow hazardous action to be stopped
quickly at any time or position within its
cycle.
WARNING!
on full revolution mechanical power presses
or any other machinery that can only be
stopped at the end of a complete cycle.
Serious injury may result, because the
machine cannot immediately respond to a
stop signal.
Do not install the Black Max
It is the user's/employer's responsibility to
read, understand, and enforce the
following requirements when using a Link
Lite Black Max as a safeguarding device.
Link Electric and Safety Control Co. takes
no responsibility where its light curtains
are improperly installed, adjusted, or used,
and where machines on which its light
curtains are used are not properly
maintained.
The machine action must be
3.
electrically controllable.
The electrical, pneumatic, and/or
4.
hydraulic control system that governs
machine action must be designed and
constructed so that de-energization of
electrical components or loss of pressure
results in stopping the machine action.
1-1
Link Lite Black Max Section 1 - User Requirements
Machine controls must be designed for
5.
"Control Reliability", i.e., so that a single
failure in electrical, pneumatic, or
hydraulic components does not prevent the
normal stopping of machine action when
required but does prevent initiation of
further machine action.
WARNING!
designed to stop hazardous machine action
if a component fails, the control may not
stop the machine action when the Link Lite
Black Max sends a stop signal, with
possible consequent serious injury or death
to personnel.
The machine must require manual
6.
initiation of action after power is turned
on, after changes in operating modes, and
each time a stop signal is applied to the
control.
Where presence sensing devices such
7.
as the Black Max are used to safeguard
part revolution mechanical power presses,
the control system must include a brake
monitor"! See 1910.217(b)(14) of
OSHA's General Industry Standards.
NOTE!
provide assistance upon request in
evaluating your machine tool as to
compliance with control requirements.
Link Systems can provide control systems
for part revolution mechanical power
presses and mechanical press brakes, and
interface systems for many hydraulic
presses and press brakes that meet OSHA
and ANSI requirements for the use of the
Link Lite Black Max as safeguarding
device. Link Electric and Safety Control
Co. assumes no responsibility when the
Black Max is used on machines with
controls that do not comply with the above
requirements or where controls not
If machine controls are not
Link Systems' engineers will
supplied by Link fail in such a manner as
to not stop the machine action when the
Black Max provides a stop signal to the
controls.
1.2. Installation
It is the user's/employer's responsibility to
properly install (or have installed) the Link
Lite Black Max, using qualified installers.
Proper installation of any necessary
supplemental barriers or safety devices, or
alternative safeguarding methods is the
responsibility of the user/employer.
1.3. Use Requirements
1.3.1. Safeguarding Configuration
It is the user's/employer's responsibility to
perform a hazard analysis for every job
performed by a machine or production
system using a Black Max light curtain as
a safety component. The user/employer
must determine and implement a
safeguarding configuration of Black Max
units, any necessary supplemental barriers,
and/or alternative safeguarding
components to enhance personnel safety
on every job performed.
1.3.2. Training
It is the employer's responsibility to train
all setup personnel, operators, maintenance
personnel, and supervisors in all aspects of
the safe setup and use of the production
system for every job performed on the
machine. Training must include the
following items.
The required safeguarding
1.
configuration for each job.
1-2
Link Lite Black Max Section 1 - User Requirements
The specific duties and actions to be
2.
performed by setup and operator personnel
for each job relative to both production
and safety. These work practices must be
in conformance with any OSHA or ANSI
standards that apply.
The machine manufacturer's operating
3.
instructions.
Instructions to never use the machine
4.
in such a manner or for any job that will
exceed any rated capacity for the machine.
All operating instructions and warnings
5.
in the Link Lite Black Max Technical
Manual including the "Safety System
Setup" and "Operator Safety System
Checkout" prescribed in section 4 of this
manual.
Instructions to never operate the
6.
machine or production process if the
checkouts required in item 5 of this list
reveals that any safeguarding component
is not properly set up and functional, or
that the machine is not working properly.
Instructions to never remove, bypass,
7.
or rewire the Link Lite Black Max or
other safety devices, controls, or
guards on the machine.
WARNING!
the correct setup and use of the production
system, including the safety components
can lead to unsafe production systems and
work practices with consequent severe
injury or death to personnel.
NOTE!
barrier would keep a person from reading
(or listening) and understanding warnings
and training instructions, the employer
Failure to train personnel in
Where illiteracy or a language
must read or provide translation of these
instructions to the person. The employer
must ascertain that the instructions are
understood.
1.3.3. Supervision
OSHA requires the employer not only to
provide but to "insure" the use of properly
applied and adjusted point of operation
safeguarding. Supervisors must
understand and enforce all items covered
in the preceding Training section for the
safe setup and operation of the machine.
1.4. Maintenance
OSHA requires the employer to establish
and follow a maintenance program for
industrial machinery. No presence sensing
device, including the Black Max, will
protect personnel from abnormal
hazardous machine action(s) that result
from failure, wear, or misadjustment of
mechanical, hydraulic, pneumatic or
electrical drive components of the machine
upon which it is installed. Inspection and
preventative maintenance of drive systems
that govern machine action is necessary to
reduce risks of abnormal machine
action(s) that cannot be stopped by the
machine control (and hence the stop signal
from the Black Max). Maintenance must
also be performed as required to keep
stopping time of machine action less than
the stopping time that the safety distance,
Ds, explained in the Installation and
Operating Instruction sections of this
manual is based upon. Maintenance
personnel must always follow any OSHA
required lockout procedures when working
on the machine and never work on the
machine while production is being run.
1-3
Link Lite Black Max Section 1 - User Requirements
WARNING!
machines, or improper repairs or
adjustments to machines on which the Link
Lite Black Max is used as a safeguarding
component, may result in abnormal,
uncontrollable machine action(s) that cause
serious injury or death even though the
Black Max is functioning properly.
Where a production system uses auxiliary
equipment for scrap chopping, material
feeding, part removal, part transfer, or
other purposes, and where any hazard to
personnel posed by auxiliary equipment is
also to be safeguarded by the Link Lite
Black Max, maintenance of this equipment
for the purposes of safety is also a must.
Failure to maintain
1-4
Link Lite Black Max Section 3 - Installation
jury
3 INSTALLATION
3.1 General Requirements
Both OSHA and ANSI standards make it
the user/employer's responsibility to see that
safety components of the production system
are installed, adjusted, and used properly to
enhance personnel protection. One or more
installers, chosen from qualified employees
or contracted from outside sources, may be
used to install the Black Max and any
necessary auxiliary or supplemental
safeguarding. Each installer must be
qualified to do the task assigned to him in
accordance with the requirements of this
manual and standards or regulatory
agencies.
WARNING!!
Max must be installed by qualified
persons. If the Black Max is not
properly installed, it will not afford the
protection intended from hazardous
machine action which can cause
serious in
The Link Lite Black
or death.
3.2.1
Summary of Black Ma x Installa-
tion Requirements
Installation of the Link Lite Black Max
must include the following procedures and
requirements. These procedures and
requirements are discussed in more detail in
sections 3.3 through 3.8. The installer(s) of
the Black Max must:
1.
Calculate, or obtain from other
persons qualified to calculate, the Safety
Distance, D
at which the sensing field of
s
the Black Max(s) must be located from the
nearest hazard to prevent a person from
reaching the hazard before the machine can
stop.
2.
Determine the mounting location and
orientation of the Black Max(s) with
consideration of the safety distance and
other operational and safety requirements
and mount the Black Max transmitter and
receiver units.
3.
Electrically interface the Black
Max(s) to power and the machine control(s).
Summary of Installation Requirements
3.2
Installation procedures and requirements for
the Link Lite Black Max and any necessary
supplemental safeguarding components are
summarized in this section to provide an
overview of the tasks that installers must
perform.
INSTALLERS!
Read this manual
completely through before beginning the
installation of a Link Lite Black Max on any
machine as a safety device.
4.
5.
Set the Black Max(s) power level.
Align the Black Max(s) transmit-
ter(s) and receiver(s).
6.
Perform a checkout sequence to
verify proper operation of the Black Max(s),
machine control, and machine.
3.2.2
Summary of Suppleme ntal Guard
Requirements
When barriers are necessary (or used by
design of the safety system) to supplement
protection provided by the sensing field
provided by Black Max units, the designated employees or outside contractor(s)
3-1
Link Lite Black Max Section 3 - Installation
k
selected by the user/employer to install the
barriers must:
1.
Determine where barriers are
necessary and the location and size of
barriers.
2.
Design and fabricate (or have fabricated) the necessary barriers.
3.
Mount the barriers and confirm their
effectiveness and that pinch points or other
hazards are not created between barriers and
moving machine parts.
Supplemental guard requirements are discussed in more detail in section 3.9.
3.3
Calculating the Required Black
Max Safety Distance.
Every machine requires a period of time
(stopping time) to stop hazardous action
after a stop signal is applied to its control
system because of reaction times in control
components, valves, and actuators and
because of inertial effects of moving
machine parts. All light curtains also have a
reaction time to detect an object in their
sensing field and send a stop signal. The
Link Lite Black Max must be installed to
provide an OSHA and ANSI required
minimum safety distance, D
, between its
s
primary sensing field and the nearest point
of operation hazard, or other moving
machine hazard to be safeguarded. This
safety distance must be calculated by a
formula specified by OSHA and ANSI
standards. The safety distance is intended
to prevent injury by requiring a longer time
for a person to reach the hazardous area
after interrupting the presence sensing field
than the time it takes to stop the machine
action that poses the hazard. Figure 3.1
depicts one application of the safety
distance.
Figure 3.1: Minimum Safety Distance
WARNING!!
The Link Lite Blac
Max must be installed at a distance
greater than or equal to the safety
distance, D
.Failure to do so can
s
result in serious injury to personnel
because it may be possible to reach
into the hazardous area before the
machine can stop.
The Minimum safety distance in the most
recent ANSI standards is calculated by the
formula:
D
= K (Ts+Tc+Tr+Tbm) + D
S
pf
Where:
D
= the required minimum safety dis-
s
tance
K = 63 in/sec (the average handspeed
constant)
3-2
Link Lite Black Max Section 3 - Installation
Ts = the stop time (in seconds) of the
machine measured from the control
output stop signal to the actuator(s)
(valves, etc.) that govern machine
motion till the machine actually
stops.
T
= the response time (in seconds) of the
c
machine control to a stop signal from
the presence sensing device (Black
Max).
NOTE!
If the Link Lite Black Max output
contacts are connected to the emergency
stop circuit of relay controls, most control
designs will cause the Black Max contacts
to directly remove power from the actuators that cause motion without waiting for
other control elements to de-energize. This
means that T
=0 in the case of these
c
controls. If the machine is a part revolution mechanical power press and is
equipped with Link Electric and Safety
Control Co.'s SS501 controls or OmniLink
5000 controls, use T
=0.005 seconds (5
c
milliseconds).
presses. See ANSI B11.1 1988 sections
6.3.2(15) and 4.11 and OSHA's CFR
1910.217 sections (c)(5) and (b)(14).
Where time based monitors with the ability
to set predetermined stop time limits are
provided on machines, T
is determined by
bm
the relation:
T
= Brake Monitor Time Setting-T
bm
s
Where Ts is the actual machine stop time
already described.
NOTE!
On machines where stopping time
performance monitors are not required, a
marginal amount of stopping time to allow
for some normal wear or degradation of
machine stopping mechanisms without
violating safety distance must be substituted for T
. Link recommends that a
bm
value from 10% to 20% of the actual
machine stopping time T
.2T
, be used in place of Tbm. Periodic
s
, i.e. from .1Ts to
s
measurement of actual stopping time must
be performed to prevent stopping time
increase beyond the allowed margin.
T
= the response time of the presence
r
sensing device (Response time for
Black Max units is less than 20 ms see unit label for specific time).
T
= the additional amount of time over
bm
the actual average stopping time
allowed by a brake monitor (stopping performance monitor) to permit
some normal wear of friction brakes
and other components before the
safety distance, Ds, is violated and
the brake monitor prevents
successive strokes.
NOTE!
Stopping performance monitors
(brake monitors) are required on part
revolution presses when light curtains are
used for safeguarding mechanical power
D
= the added safety distance required to
pf
compensate for the possibility that
fingers or hand could penetrate
beyond the plane of the light curtain
sensing field plane before the profile
of the finger/hand/arm is large
enough to be detected by the sensing
field.
All presence sensing devices have a limited
object sensitivity, i.e., it takes a certain size
object to be detected at all points in the
sensing field. Penetration depth depends
on the minimum object sensitivity, M.O.S.,
of the light curtain. M.O.S. is defined as
the smallest object profile that will be
detected at all points in the active sensing
field of the light curtain. The penetration
depth factor, in inches, is described by the
3-3
Link Lite Black Max Section 3 - Installation
following formula. Use this formula only
for M.O.S. less than 2.75 inches.
D
= 3.4 (M.O.S. - .276)
pf
Figure 3.2 illustrates the penetration depth
factor in graphical form
Figure 3.2:
penetration depth factor, D
Graphical Representation of
, vs. minimum
pf
object sensitivity.
The minimum object sensitivity in inches
for Link Lite Black Max light curtains is
specified on a label on both transmitter and
receiver enclosures. Standard range units
(to 50') for primary point of operation
guarding have a M.O.S. of .95 inches.
Long range units (to 100') for primary point
of operation guard-ing have a M.O.S. of
1.25 inches. Perimeter guarding models
and supplemental remote extension guarding units may have larger M.O.S.. Always
determine M.O.S. from the labels on the
actual units used. Always verify that both
receiver and transmitter units have the
same M.O.S. stated on their labels before
installing.
PLEASE NOTE!
When individual
channels are to be blanked (turned off) to
allow fixtures or obstructions that extend
into the primary Black Max sensing field,
additional safety distance may be necessary
to account for the increase in M.O.S. due to
blanking. Blanking is possible on Black
Max units with .95" M.O.S. and 1.25"
M.O.S.. Each contiguous (side by side)
channel blanked increases the M.O.S. by
.75".
When the Link Lite Black Max is used on
machines such as power presses, press
brakes, and other machines that have slides
used to impart motion and force to tooling,
the stop time must be measured at approximately midstroke in the closing (hazardous) portion of the stroke. The best
stopping performance of a machine will be
attained when all machine adjustments that
affect stopping time are adjusted within the
machine manufacturer's specifications. It
is the user/employer responsibility to
always maintain mechanisms that affect
stopping time in good repair and adjustment where safety devices like the Black
Max depend on the stopping action of the
machine to protect personnel.
Where a time-base brake monitor is used
on a press or other machine that is to have
a Black Max installed for point-of-operation safeguarding, the stopping time, T
can be determined by use of the brake
monitor. On time base brake monitors
equipped with stop time display, stop the
machine at approximately the mid point of
the die closing portion of the stroke and
read the stopping time displayed. For a
time based brake monitor with no direct
display of stopping time but that has a dial
or other method of setting allowable stop
time, make repeated machine stops near
midstroke, adjusting the time setting each
time until the lowest time setting that
results in the brake monitor allowing a
successive stroke without resetting is
found. This is the stop time, T
, that must
s
be used.
,
s
3-4
Link Lite Black Max Section 3 - Installation
When no stopping performance monitor is
used on a machine (you must use one when
required by OSHA or ANSI standards) and
there is no statutory or standards requirement to use a stopping performance
monitor, a stop time measurement device
can be used to measure T
. These are
s
portable devices that usually attach to the
moving slide of the machine to detect when
the slide is stopped after another mechanism of the device gives a stop signal.
3.4
Mounting Considerations and
Requirements
Any installation of Link Lite Black Max
light curtains as a safety component of a
production or other system must include
determination of mounting locations and
orientations of the components of the
Black Max(s) that meet both the safety and
operational requirements of the production
system. General mounting requirements of
various Black Max components are
provided in the following subsections. Any
special requirements must be determined
by the user/employer and must not violate
the general requirements.
Any location and orientation of the
1.
main Black Max transmitter and receiver
units must place the sensing field at a
distance from the hazard greater than or
equal to the safety distance required in
section 3.3 of this manual, i.e. so, that
hands or fingers are D
from the hazard
s
when the sensing field is interrupted by any
part of the body.
Locate the main Black Max transmitter
2.
and receiver units at the same height and
orient at the same angle. The numbers
beside the acrylic lens on the front of the
transmitter unit and the receiver unit
designate the transmitter and sensor
channels. Each transmitter channel number
must be directly across from each similarly
numbered receiver channel. See Figures
3.3.a and 3.3b.
3.4.1
Black Max Main Transmitter and
Receiver Units.
All Black Max installations will have main
transmitter and receiver units that must be
located and oriented to create a primary
sensing field whose function is to detect a
person's hand or other body part and to
provide a stop signal to the machine
control to prevent or stop hazardous
machine action(s) when the hand or other
body part is detected. The main Link Lite
Black Max transmitter and receiver units
may be mounted vertically, horizontally, or
at an angle as long as the following general
requirements are met.
Figure 3.3a:
Front view of transmitter and
receiver units mounted at a common height.
Figure 3.3b:
Top view of transmitter and
receiver units.
3-5
Link Lite Black Max Section 3 - Installation
The mounting location or method must
3.
leave access for work pieces, tool changes,
and other operational requirements.
The main transmitter and receiver must
4.
be mounted so that the indicator lights and
warning messages on their enclosure doors
are clearly visible to operators and supervisors and so that the enclosure door can be
opened.
5.
may be mounted directly to the machine, on
brackets attached to the machine, or on floor
stands as long as safety distance and
operational requirements are met.
Mounting brackets must be sturdy to
provide a rigid mounting support that is not
easily knocked out of alignment. When
prefabricated brackets are not provided, the
installer must design and make suitable
mounting brackets.
6.
be installed on two or more machines that
are arranged in a row, alternate the transmitter and receiver units (as to which unit
is mounted on the left and which on the
right side of the machine) on each adjacent
machine as shown in Figure 3.4 to reduce
the possibility of crosstalk. Crosstalk
occurs when light pulses from transmitter
unit mounted on one machine are "seen"
not only by the intended receiver unit, but
also by receiver units on other machines.
For many infrared light curtains on the
market today this creates a danger to
operators because their receiver units
accept crosstalk pulses just as they accept
pulses from the correct transmitter. An
operator may have a hand or arm in a light
curtain sensing field, blocking light pulses
from the transmitter on his machine, and a
transmitter on another machine can pass
over or under his arm, "fooling" the receiver into not providing a stop signal to
The main transmitter and receiver
When Black Max light curtains are to
the machine control as required. The
Black Max is designed to detect crosstalk
from other light curtains and to provide a
stop signal if it occurs. It is important to
install Black Max light curtains in such a
manner as to avoid nuisance machine stops
caused by crosstalk.
Figure 3.4:
crosstalk.
The scheme shown in Figure 3.4 should
also be followed when infrared light
curtains other than the Black Max are used
on adjacent machines.
Mount the Black Max main transmitter
7.
and receiver units on the rubber shock
mounts provided in the shipment box using
one of the two mounting methods shown in
Figure 3.5.
Figure 3.5:
Mounting scheme to minimize
Use of rubber shock mounts.
3-6
Link Lite Black Max Section 3 - Installation
p
The Black Max transmitter and receiver
8.
each have four mounting holes, two in each
end mounting flange. See Figure ---, page
---, for mounting hole dimensions and
patterns for various length units.
3.4.2 Black Max Remote Segment
Transmitter and Receiver Units.
Black Max remote segment transmitter and
receiver units are housed in separate
enclosures from the main Black Max
transmitter and receiver. When electrically
connected to the main transmitter and receiver units, they provide additional
channels of emitters and receptors which are
sequenced by the logic electronics in the
main transmitter and receiver, respectively. Remote segment units will be part
of the installation only when the
user/employer has purchased them as
components of the safety system to supplement the protection provided by the main
transmitter and receiver units.
Since the remote segments are in separate
enclosures from the main Black Max units,
they can be used to create "L" shaped or
other sensing field shapes when combined
with the main transmitter and receiver
units. When safety distance requirements,
machine configuration, or operational
requirements place the primary sensing
field between the main transmitter and
receiver at a location that allows a person
to pass completely through the primary
sensing field toward the hazard, horizontally oriented remote segment Black Max
units can be used to detect a person standing inside the sensing field as shown in
Figure 3.6.
Figure 3.6:
erson inside the main sensing field.
Horizontally mounted remote segment Black Max units to detect a
3-7
Link Lite Black Max Section 3 - Installation
Figure 3.7. Shows remote segment units
mounted on a straight side press with
columns extended beyond the bed and
slide.
Figure 3.7:
units mounted between columns of straight
side power press to detect a person standing
inside the primary sensing field.
Remote segment Black Max
The mounting requirements for remote
segment Black Max units are generally the
same as for main transmitter and receiver
units except that when used for
supplemental guarding between the main
sensing field and the hazard, there is no
safety distance, D
location of remote segment units.
NOTE!
any manner intended to extend and be part
of the main sensing field, safety distance
requirements will then apply to the remote
segment units.
If remote segment units are used in
, requirement for the
s
Figure 3.8:
between the primary sensing field and the hazard.
Remote segment Black Max units oriented at an angle to sense a person
3-8
Link Lite Black Max Section 3 - Installation
Also, the mounting arrangement is somewhat different for the remote segement units
as shown in Figures 3.9a and 3.9b.
Figure 3.9a:
Black Max unit mounting.
Example of remote segment
Black Max remote segment transmitter and
receiver units must always be mounted on
the same side of the machine, respectively,
as the main transmitter and receiver units as
shown in Figure 3.10
3.4.3 Use of Mirrors for Multi-Sided
Point of Operation or Perimeter
Safeguarding Applications
In some safeguarding applications mirrors
may be used to "bend" the sensing field
provided by main Black Max units to
provide two or more sided safeguarding for
point of operation or perimeter safeguarding. Mirrors for this purpose can be
purchased from Link Systems. Since even
the finest quality mirrors do not reflect
100% of incident light and some diffusion
of light occurs, the maximum sensing field
distance between transmitter and receiver
will be reduced by about 10% per mirror
used. Figure 3.11 illustrates a three sided
point of operation safeguarding application.
Figure 3.9b:
Black Max unit mounting.
Figure 3.10:
transmitter and receiver units on the same
respective sides.
Alternate remote segment
Mount main and remote
NOTE!
maintained on all sides of sensing field.
Figure 3.11:
of operation guarding on C frame press.
Safety Distance, D
Example of three sided point
, must be
s
3-9
Link Lite Black Max Section 3 - Installation
g
Figure 3.12 Illustrates a four sided perimeter guarding application.
Figure 3.12:
perimeter guarding application.
3.5 Electrical Wiring to I nterface Link
Lite Black Max Units to Power and
the Machine Control.
When all Link Lite Black Max transmitter
and receiver units have been mounted, you
are ready to make electrical connections to
interface the Black Max(s) to power and
the machine control. Also, if remote
segment Black Max units are used, you
must connect the remote segment transmitter unit to the main transmitter unit and the
remote segment receiver unit to the main
receiver unit with the cables provided.
Top view of four sided
accommodate a 1/2" conduit fitting. Run a
1/2" conduit from the machine control
enclosure to each main Black Max transmitter unit. Similarly, run a 1/2" conduit
from the machine control enclosure to each
main Black Max receiver unit.
required for the transmitter and receiver
should be pulled through the 1/2" conduit.
Use of flexible conduit with integral armor
and ground wire, such as Seal Tite, is
preferable. When such flexible conduit is
used, it is also desirable to route it in such
a way as to leave slack that will allow the
Black Max units to be moved further away
from the machine if future setups necessitate moving the transmitter(s) and receiver(s) to meet safety distance requirements.
There are also two holes that are sized for
3/4" fittings, one in both ends of the main
transmitter and receiver units. These holes
are closed with screw in type plugs. They
should only be used for cable connections
between main transmitter and receiver
units and remote segment receiver and
transmitter units.
plugged openings for conduit between the
main Black Max units and the control
enclosure. Use the open 7/8" hole only.
DO NOT
All wires
use the
WARNING!
shock hazards lock all power to the
machine off before beginning the
wiring procedures for the Link Lite
Black Max. In the U.S., follow OSHA
Lockout re
3.5.1 Conduit Requirement s
The main Black Max transmitter and
receiver units both have a 7/8" hole to
To prevent electrical
ulations.
3.5.2 Power Connections
Both the transmitter and receiver units of
the Black Max must be supplied with 115
VAC (Nominal) power. Generally, this
power should be supplied from a transformer with 115 VAC secondary in the
machine control. Pull a "hot" wire, a
neutral wire, and a ground wire through the
conduit from the control enclosure to the
Black Max main transmitter unit. Refer to
Figure 3.13 for the location of the combination three connection power terminal and
plug in connector.
3-10
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