LJIM Instruction Manual
02116-53-001
Issue 3 19 January 2021
LASERMET
LASER JAILMASTER
INSTRUCTION MANUAL
FAIL SAFE LASER INTERLOCK CONTROLLER AND
ACTIVE BEAMGUARD INTERFACE
Page 1: ...LJIM Instruction Manual 02116 53 001 Issue 3 19 January 2021 LASERMET LASER JAILMASTER INSTRUCTION MANUAL FAIL SAFE LASER INTERLOCK CONTROLLER AND ACTIVE BEAMGUARD INTERFACE ...
Page 2: ... Interlock Operator Output Contacts 10 6 3 Beam Shutters 10 6 4 Shutter with own Power Supply 11 6 5 Interlock Connectors 12 6 6 Electromagnetic Door Locks 13 7 Expansion Units 14 7 1 Front Panel 14 7 2 Connections to Expansion Units 15 7 3 Use of Expansion Units 15 8 Mismatch Detector 16 8 1 Configurable Options for Safety Circuit Mismatch Events 16 8 2 Clearing a Mismatch Fault Indication 17 8 3...
Page 3: ...1 Serial Interface 21 11 1 Connections 21 11 2 Modbus Operation 22 11 3 Register Access 23 11 4 Example using Python 25 12 Connecting Expansion Units to ICS 7 OEM 27 13 Fuses 27 14 Specifications 28 14 1 Main Unit 28 14 2 Expansion Unit 28 15 Warranty 29 16 Contact Details 30 ...
Page 4: ...umber ICS LJIM and ICS LJIM SO respectively has been tested in accordance with the following standards and found to comply Lasermet certifies that this product complies with the basic requirements for health and safety as provided by the following Standards Standards EN ISO 13849 1 2015 Safety of Machinery Safety related parts of Control Systems Part 1 General Principles for Design Supplier Laserm...
Page 5: ...fixing holes They must not come into contact with each other or any other moving part when in use The parts should never be subject to impact or mechanical strain Safety switches should never be defeated or bypassed It is imperative that all steps are taken to ensure that any spare actuators are made unavailable such that they cannot be used to defeat the switch or reduce the protection offered by...
Page 6: ...unexpected start up of the laser If the system fails to arm because of an ABG fault condition the Arm request should be removed and the fault located before the laser can be reset The LJIM has a fully dual channel cross checked architecture and when correctly wired can realise a system compliant with EN ISO 13849 1 up to performance level e Two safety interlock outputs each rated at 4A resistive 5...
Page 7: ...ailures in the sensors and wiring which may be connected to the unit In service operation 365 days year 2 x eight hour shifts Functional demand on the controller once per half hour Main Unit Achieved Characteristics Architecture Category 4 Performance Level PL PL e PFH 1 h 2 03 x 10 8 MTTFd 126 years Mission Time 20 years Diagnostic Coverage DC 99 HIGH Expansion Unit Achieved Characteristics Archi...
Page 8: ...operators It has indicator lights on its top surface which would normally only need to be observed by installation and maintenance personnel Provision should be made to prevent the unit from sliding along the DIN rail after fitting for example by the use of end clamps or other equipment During installation wired connections will need to be made from the LJIM to the monitored windows and wall panel...
Page 9: ...e other dual channel inputs and outputs are wired A B B A in line with Lasermet s normal practice Input signals are indicated by a green background while the interlock outputs have a pink background Fault status indications have an orange background 6 Wiring A typical wiring scheme for the LJIM is shown in the diagram Be sure you know which configuration you require before you attempt to wire the ...
Page 10: ... of the equipment being changed or moved it is often most convenient to be able to unplug the equipment Lasermet provide a range of small distribution boxes which allow for convenient positioning of wall or surface mounted plugs for laser interlocks and sockets for shutters The boxes are available with different combinations of plugs and sockets Modern industrial lasers are usually equipped with d...
Page 11: ...ir own power supply or are to be run from an existing supply you can use one of the controller outputs to operate them If the shutter requires a single contact to operate it connect the A and B contacts of the controller output in series as shown in the wiring diagrams above for LS shutters so that the shutter closes if either one or both output contacts open The connections should be arranged so ...
Page 12: ...the following connections For lasers with dual channel interlocks use the following connections Where the laser may be removed from the system or exchanged a Lasermet Distribution Box may be used to provide a connection point convenient to the laser In this case for lasers with a single channel interlock the A and B LJIM output channels are connected in series to pins 1 and 2 of the plug of the di...
Page 13: ...tch Note that several maglocks can be wired in parallel from the same LJIM output provided the 4A maximum rating of the contact is not exceeded Some locks can be configured for 12V or 24V supply They should be set for 24V operation and run off the 24V supply to reduce the current consumption to 0 25A per lock To set the Maglock for 24V operation open the terminal access cover on the lock Remove th...
Page 14: ...a test connection is also provided This is normally at 24V When lowered to 0V the expansion unit performs a self test on each of its channels If the self test is successful the output contacts are re enabled If the self test fails one of the contacts will remain open The self test is requested by the LJIM every time the unit is armed 7 1 Front Panel All of the terminals are identified on the label...
Page 15: ...o faults would normally be expected However a fault on one channel of the active beamguard window or panel circuits may also lead to a self test fail which will lead to a mismatch indication even after the ABG fault has been cleared In this case cycling the test connection at the LJIM will clear the fault When setting up the system for the first time it may be desirable to put a switch in the test...
Page 16: ...al applications where the inability to use the laser would be costly or inconvenient Having detected and indicated that there is a fault it allows the system to be reset to operate on the one good safety circuit provided the faulty circuit has been closed The need to manually reset the system before it can be used provides a clear indication to operators that there is a problem that needs to be ad...
Page 17: ...entify and repair the fault at the earliest opportunity as a fault has been identified and the system may cease to provide protection without further warning If the LJIM has been configured to permanently lock out it can only be reset by pressing the Fault Reset button This should only be undertaken by suitably qualified technicians once the fault has been identified and repaired as otherwise the ...
Page 18: ...akage into the circuits from a local power supply If just one channel has a fault the mismatch detector will disable the LJIM until it is reset Active Beamguard OK A and B These LED s will light in green when both ABG circuits on the LJIM are complete The system will not arm if either or both LED s are unlit If the self test has failed one of the LEDs will be off even if there is no ABG status fau...
Page 19: ...olled by a microcontroller If this has failed or has not been programmed the MCU Fault LED will illuminate In this case the ABG status LEDs will not be valid Power Supply LEDs Green 24V and Expn 24V LEDs indicate that the main 24V power supply and the 24V switched power supply to the ABG units are on If the 24V LED is not illuminated check the power supply connection and the main power supply fuse...
Page 20: ...tion should only be taken when everyone is ready and the necessary safety precautions have been taken e g protective eyewear etc If an attempt to arm the system is made while an input is invalid the controller will not arm even if the input is restored The external Arm contacts must be opened and a new arm attempt made 10 2 Resuming Operation after ABG Fault When a fault is detected by the ABG sys...
Page 21: ...teristic impedance which depends on the cable but 100 120R is normally used This is essential at high communication speeds but at the more modest speeds used here it is still useful for reliability The LJIM and expansion units include 120R resistors which may be connected as bus terminators by closing the switches next to the RS485 terminals Depending on the installation the bus termination may be...
Page 22: ...apability a PC with a USB to RS485 adapter running Modbus master software or a custom status display For further details of master options please contact Lasermet A PC example is given in a later section Device Address Each slave device has a device address which is used by the master to select a slave This can be in the range 1 247 The LJIM is shipped with the address set to 247 When setting up t...
Page 23: ...2 1 0 BR4B BR3B BR2B BR1B LK4B LK3B LK2B LK1B 1 1 1 1 1 1 1 1 The normal values are shown in the bottom row A zero indicates a fault and will be accompanied by a red LED on the front panel BRxx 0 indicates a track break or open circuit and LKxx 0 indicates a leakage fault Register 30001 40001 General status bits High byte Not used 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0 Low byte General status 7 6 5 4 3 2...
Page 24: ...ata high 30000 FF Data low 30000 FF Data high 30001 00 Data low 30001 04 Error check code CRC CRC In this case there are no faults and the outputs are not armed or if the addressed unit is an expansion unit the output status is OK To use the read holding registers command function code 03 is used Writing the Address This is implemented as a write to holding register 40000 This example sets the add...
Page 25: ...ss the units For test purposes the Python Minimal Modbus library may be useful To use this you will need Python The pySerial library The MinimalModbus library These can be easily downloaded and installed under Windows or Linux You will need to install any drivers required for the USB to RS485 adapter and identify which serial port corresponds to your adapter Once this has been done run Python at a...
Page 26: ... indicates that all status bits are 1 To set a new slave address lj write_register 0 1 0 6 This sets the address to 1 We will now need to set the address for the Python instrument to the address we have just set so that we can continue to communicate lj address 1 If there are problems it may be useful to have more debug information We can enable extra diagnostics as follows lj debug True The Pytho...
Page 27: ...This causes the system to trip and remove the arming signal to the ICS 7 OEM The test inputs on the expansion units are connected to the switched 24V power supply available from the D15 expansion connector on the ICS 7 OEM The units must have a common ground connection The self test function of the expansion units is operated whenever the ICS 7 OEM arms Note that if the test connection is not made...
Page 28: ...gress Protection IP20 Operating Conditions 0 to 55 C 0 95 relative humidity non condensing Size 210mm wide X 90mm high X 55mm over DIN rail Weight 0 4kg 14 2 Expansion Unit As for main unit except for the following Shutdown Time 13 15ms typical Measured from opening of ABG circuits to opening of interlock operator contacts on main unit Power Consumption 4 5W typical Size 210mm wide X 90mm high X 5...
Page 29: ...s in workmanship for 12 months Damage or defects caused by other factors are not covered For example industrial contamination incorrect cleaning storm damage Consequential loss is not covered under warranty Compensation for indirect or direct loss or damage is expressly excluded Rectification of the defects or a replacement does not initiate a new warranty period For all deliveries payments and ot...
Page 30: ...ide a complete system We also supply equipment and consultancy covering all aspects of laser safety Full support design and installation is available from Lasermet please contact us for any queries For sales and technical support Lasermet Ltd Lasermet House 137 Hankinson Road Bournemouth BH9 1HR United Kingdom Tel 44 0 1202 770740 Fax 44 0 1202 770730 Email sales lasermet com Website www lasermet ...
