Our modules are designed to be linked together in a single linear run of 8-conductor interlock cable, as demonstrated in the schematic above.  This greatly simplifies installation and allows our clients to purchase only those modules required to perform a desired interlock control function.    If you are not familiar with our modular system operation, or aren't completely familiar with the definitions of "Defeatable" and "Non-Defeatable" access controls, please visit our Education page.
Laser interlock schematic diagram
Part # LSS2380  Laser Warning Module

The Laser Warning Module provides a simple but noticeable visual indication of the present interlock state.

     The module clearly indicates the different interlock states:
1.  Normal Safe State - Indicating the system is ready to arm, the "LASER SAFE" text is brightly illuminated using
     rear projection green LEDs.

2.  Laser ON State - High-power white LEDs illuminate the international laser warning symbol.  The bezel
     protrudes forward from the module to ensure the warning can easily be seen upon a side approach.  System
     wiring can be configured to make this module produce a solid warning, or it may be configured to strobe.  The
     "DANGER LASER ON" text is brightly illuminated using rear projection red LEDs.  If a client has an application
     where the "DANGER" text is not warranted, a jumper exists on the rear of this module that will change the text
     to simply show "LASER ON".

3.  Crashed State -  The crashed state is an information state that is only intended for the laser room operators.
     In the crashed state, a condition is present that will not allow the interlock to arm.  Examples of this condition
     can include a crash button depressed, a non-defeatable door is open, etc.  When this crashed state is present,
     the green "LASER SAFE" text will slowly fade between a bright state and a dim state.


Note:  Module design updated March 2012 using a proprietary layered polymer design for hidden message display.
Part # LSS2381  Interlock Control Module

In any interlock system, at least one LSS2381 module is required to arm/disarm the room.
Many clients place several of these modules at key locations in a large room.


The Interlock Control Module is the primary means of arming and disarming the laser interlock.  One or more interlock control modules can be placed anywhere within a single laser area to control the state of the interlock.

The "DISARM" button will always take precedence over a request to arm the system. (All crash switches also override the ability to arm the system.)

LEDs on the front label clearly convey "ARMED," "DISARMED," or "CRASHED" status of the interlock system

The "DISARM" button is the preferred method of securing the system for normal shutdowns.  Following best practice, the activation of emergency stop switches should be reserved for emergency situations and periodic system testing only.

Part # LSS2383  Emergency Crash Module

The Emergency Crash Module is a safety device specified in ANSI Z136.1-2007 section 4.3.10.2.1.  The module should be placed in a location(s) quickly accessible to the laser workers.   It is intended to be used for emergency deactivation of the laser or laser shutter to reduce the output levels at or below the applicable MPE.

The module has priority over all interlock controls.  Multiple modules may exist within the system chain.

The switch is a maintained mushroom push-lock, turn-reset type emergency stop switch with LED backlit illumination. The LED illuminates red when the room interlock is in the "set" condition and is highly visible over a wide area. 
Part # LSS2384  Laser / Shutter Interface Module

At least one LSS2384 module is required in any system.  This module receives power for the entire room interlock
and provides dry contacts for the laser or shutter.  Multiples of this module can be installed to accommodate multiple lasers or shutters


Updated in August 2011, the LSS2384 Laser / Shutter Interface Module provides local control for arming and disarming the final laser interlock relay.  The advantage of this local control is most evident when multiple relay modules are placed on a single interlock system.  The room interlock can be armed, yet each individual station can arm and disarm independently whenever the main interlock is set.  An example of this would be an arrangement where the LSS2384s are controlling several independent shutters on one or more laser tables.  Each shutter can be opened individually, yet all will close simultaneously if the main room interlock trips.  The user can connect to two sets of Form C dry contacts (common, normally-open, and normally-closed) and control a load up to 6 amps on each set.  The LEDs on the front label clearly show the operational conditions.

A jumper is provided on the rear of this module that can be configured for automatic arming and disarming simultaneously with the main room interlock.
Laser warning that meets laser safety officer requirements
Laser safety interlock that drives the laser safety shutter
Laser interlock relay that drives the laser beam shutter
laser relay emergency stop
Laser room access keypad with card reader
laser room exit switch
Laser interlock system recommended by the certified laser safety officer

Laser room door monitor
LSS2387 Non-Defeatable Access Monitor Kit
Part # LSS2387 Door / Curtain Closure Monitor Kit

This kit provides a Non-Defeatable Area or Entryway Safety Control in accordance with ANSI Z136.1-2014 Section 4.3.10.2.2

The LSS2387 module is placed beside a door on the inside and is wired to the door position sensor.  The room interlock will crash when the sensor indicates an open condition.  The LSS2306-12 armored dual magnetic door sensor is included in the kit.  If double doors are to be monitored, a second sensor can be purchased and wired in series with the first sensor. 

Although our interlock system can accommodate multiple doors with full defeatable access controls, a significant savings can be realized by designating a single door for defeatable access and all other doors as emergency ingress / egress with this kit.

Part # LSS2387B Door / Curtain Closure Monitor Kit

The LSS2387B is an upgrade that contains a separate relay that is activated during laser operations.  This relay has two form C contacts available.  Some clients use this relay to disable an electric strike entry system during laser operation.  Others use it to drive an external Bi-Lume sign.  With two form C contacts, this module can do both at once.
LSS2387 Non-Defeatable Access Monitor Module
LSS2306-12 Door Sensor
LSS2388 Defeatable Access Control Kit
laser room door safety switch
laser protection switch
LSS2388 Control Module
LSS2388KP
Keypad Module
LSS2388PTE
Push-to-Exit Module
LSS2306-12 Door Sensor
Part # LSS2388 Defeatable Access Control Kit

This kit provides a Defeatable Area or Entryway Safety Control in accordance with ANSI Z136.1-2014 Section 4.3.10.2.2

Launched in August 2012, Laser Safety Systems is proud to present our newest and most advanced laser access control system, the LSS2388 Defeatable Access Control Kit.  The system replaces the LSS2385 Defeatable Access Control Kit, the LSS2386B External Card Reader Activated Kit, and the LSS2389 LCA to LCA Controller, which are now obsolete.  Every feature of those older units has been consolidated into the new LSS2388 Kit described below.  We are retaining a limited quantity of the older systems to accommodate orders from facilities who already have these older systems and wish to maintain consistency throughout a lab space.  We offer an upgrade path of 50% off for any facility wishing to replace our previous access controls with the new LSS2388 Kit.
The Control Module features our new layered-polymer hidden message LED backlit display to convey system status to the interior of the laser controlled area.
The Control Module accepts the 8-conductor interlock cable and passes the signal through to the other side.  The connections to the Keypad Module and Push-to-Exit Module are pre-terminated with plug & play cable connection that require no field termination stripping or crimping.
The system has the capacity to drive an optional 24V magnetic lock (or) a 12V electric strike latch entry system.
The system Keypad Module can accept our new optional stand-alone LSS2388CR Card Reader Access Control Module, or the Control Module can accept an "override" trigger from an existing facility card access entry system.
The system has provisions to tie into the building Fire Alarm contacts.
The system has the capacity to provide power to, and accept an input from, a motion detector for automatic egress override.
The system provides audible feedback of system functions, but has provisions to allow the end client to turn off
all unnecessary audio if desired.
The system can be ordered as a "LCA to LCA" access controller.  In this configuration it comes with two Keypads Modules and no Push-to-Exit Module.  This configuration allows two Laser Controlled Areas (LCAs) to exist side-by-side and permits safe passage of authorized personnel from one LCA to the other in either direction.  If the proper credentials are not presented (keypad entry code or wireless access card), the system can trip the interlock in both rooms to secure the lasers.
Accessories:
laser interlock power supply
laser interlock cable
laser room magnetic lock mounting kit
laser room magnetic lock
Part # UL24V  System Power Supply

At least one UL24V System Power Supply is required in any system (or the client has the option to provide his own 24VDC).

This UL Listed power supply provides a safe low-voltage (24VDC) at up to 1 amp for powering the interlock system.  Our system is very efficient; a single wall-wart power supply can feed a system with multiple door interlock modules, warning modules, and laser relay modules.  If you are concerned about the power budget for a large system, you need not worry.  Laser Safety Systems will calculate the total load of all desired modules to verify your system will meet the allowable power budget.
Part # 8CUL  Main Interlock Cable

Cable is required to pass between all interlock modules to link them all in a common control network.
Sold by the foot, our UL Listed plenum-rated cable is delivered in a spooled length desired by the customer.
Being plenum-rated, customers can often make the simple choice to run a portion of the cable above a drop-ceiling without conduit.  The cable is 8-conductor 22AWG stranded with 8 distinct wire colors that match the schematic diagrams we provide.  The cable is very useful as the means to connect the LSS2384 module to the client's laser or shutter controller.  This normally requires a single pair of wires, so the remaining 6 wires are simply cut back and unused.
Part # LSS2305  400lb Magnetic Door Lock and Mounting Hardware

The LSS2305 Magnetic Door Lock is the ideal choice for use with our system because it is specifically designed to run with low current draw on the 24 volt wiring.
The LSS2388 Defeatable Access Control Kit is designed to drive this magnetic lock.  The choice to place a magnetic lock on a door should not come lightly.  The benefits of added security must be weighed against the complexity of NFPA codes compliance.  When a magnetic lock is added, it provides extra security to the room and prevents inadvertent interlock trips because the door will not open without proper credentials entered from the outside, or a release command from the inside.  The LSS2305 Magnetic Lock includes L&Z bracket mounting hardware for open-inward or open-outward door configurations.
Please call to discuss the magnetic lock option before considering a purchase.

laser door monitor switch
Part # LSS2306-12  Dual Contact Magnetic Switch

With stainless steel armored cable, the LSS2306 Dual Contact Magnetic Switch is ideal for door position sensing or monitoring the integrity of a class 1 laser enclosure.
The switch is included with the LSS2387, LSS2387B and LSS2388 Kits with 12 inches of armored cable as part number LSS2306-12.  When double doors exist on an entryway, it is wise to install a second switch to monitor the closure status of the second door wing.
This part contains two normally open (NO) switches that are closed in the presence of the magnet.  This part can be custom-ordered to provide longer armored cable lengths up to 20 feet.  The contacts can also be custom ordered to be NC-NC, NC-NO, or as the standard NO-NO.

Interlock to be used with laser safety eyewear
Multiple Parts - Hellermann-Tyton Surface Track and Boxes

Laser Safety Systems carries a large variety of mounting hardware.  It includes surface track, single-gang and dual-gang surface boxes, elbows, corner pieces, etc.
If your facility wants to install an interlock system on the surface of a wall, this product is aesthetically pleasing and very easy to use.  Our pricing on mounting hardware is superior to anything you can find at local home improvement stores.
Hellermann-Tyton's low voltage TSR surface raceway system is a one-piece latching duct designed to contain, route and protect wire and cable when it is not feasible to run it within the wall. It is manufactured from a cleanroom compatible 94 V-0 PVC and features a superior "peel & stick" adhesive which conforms to most any surface to make a permanent installation without any drilling or screwing.

Designed with a flexible hinge, the raceway allows numerous openings without creating discoloration or stress cracking. The self-locking, hidden positive latch allows for quick re-entry as well as secure installation of wire and cable.
This concludes our product listing. 

To get started with your system planning, please contact us at 757-229-6109 or click on our Contact page button below.
We look forward to hearing from you.

Our LSS-2388 Control Module utilizes our exclusive and proprietary "Intelligent Access Timing" as is described below:

Pre-Access timing:
  If an override is initiated but the door is not opened within 5 seconds (factory default), the override condition is canceled.  A short cancellation tone is produced to convey the condition to the user.  This "pre-access" timer can be adjusted via the programming keypad to any value between 5 and 15 seconds.  The automatic cancellation avoids the wait time that would otherwise occur in a non-intelligent access timer.

Access timing:  If an override is initiated and the door is subsequently opened, the unit senses the opening and immediately transitions from pre-access mode to access mode where the access time programmed into the system is counted.  During the countdown period, pressing any keypad button or pressing the push-to-exit button will restart the access timer.  This is convenient at times when the door must be held open to bring in a large piece of equipment which may take longer than the preset time limit.   The access timer can be adjusted via keypad to any value between 5 and 99 seconds. 

Access warning time:  If an access is started and the door is held open beyond the programmed access time, a screaming tone is produced to warn the user of an impending system trip to safe mode.  If the door is closed during this warning tone period, the interlock will not trip. This warning tone factory default time is 5 seconds, but can be adjusted via keypad to any value between 5 and 15 seconds. 

Post-Access automatic cancellation:  When the door is closed after an access, the controller senses the closure and cancels the override condition within 2 seconds of closure.  This allows the system to be ready for another entry or exit request without waiting for the normal timer to expire.  As an example, a user of a non-intelligent entry system, as those carried by other manufacturers, may have his access timer set to 40 seconds.  The user might pass through the door in 5 seconds, but the timer will continue to run for an additional 35 seconds.  During that time, a non-qualified person could approach this door and make entry during this "wait" period because the controller is in an unlocked state.  Additionally, another person approaching the door would need to wait for the timer to expire before entering his access code because the time remaining is an unknown. 

"Stuck" Exit button error handling:  Our system looks for the most obscure problems and handles them accordingly.  If someone tries to prop open the door and put a broom-stick against the Push-to-Exit button, our system will register this as a problem and provide an alarm and automatic shutdown after 15 seconds.

Although our interlock system can accommodate multiple doors with full LSS2388 defeatable access controls, a significant savings can be realized by designating a single door for defeatable access and all other doors as non-defeatable emergency ingress / egress with the LSS2387 Non-defeatable Access Monitor.
A few highlights of the LSS2388 Defeatable Access Control Kit:
For more details, please refer to our user manual which can be found on the "Tech Manuals" page
Part # LSS2388CR   Card Reader Option for LSS2388 Keypad Module

The LSS2388CR Card Reader Option is an exclusive device offered by Laser Safety Systems.  The reader is completely “stand alone” and does not require any connection to an external computer system.  The module simply plugs-in to a socket that exists on the LSS2388KP Keypad Module.  The Principle Investigator or Lab Owner has the ability to grant or deny access to the lab via Laser Safety Systems provided cards or key fobs that are given to qualified laser workers.  If multiple rooms in a facility are configured with our LSS2388 controllers with card reader option, then each lab owner can program its lab access controller to grant or deny access to a card from a different lab owner.  In other words, personnel only need to carry a single card or keychain fob and may be selectively allowed access to several labs.
The lab owner is in complete control of who can and cannot access his lab space.  No computer is utilized.  The lab owner will possess two "Control" cards.  Using these cards, the lab owner can "Enroll" or "Delete" individual worker's cards simply by swiping the Control Card, swiping the user card, then swiping the Control Card again.  It is a simple and effective way of maintaining access control.

The purchase of the LSS2388CR option includes the card reader, 2 Control Cards, and 5 "user" keychain cards.  Additional cards are available for purchase if needed.
laser room card reader access control
User Key Fob
LSS2388CR plug-in module
Laser Safety Interlock
Typical room installation plan that does not utilize physical restraint.
Typical room installation plan when magnetic lock is used for physical restraint. 
Please note:  Electric strikes can be used instead of magnetic locks and are preferred from a fire safety standpoint.
Typical room installation plan configured for Non-Defeatable operation
laser safety menu


laser warning symbol for class 4 laser
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