System BLVT
Safety light curtains with blanking function
The BLVT safety light curtains are designed for safeguarding danger points and areas and as access guarding. The blanking function allows fixed or variable obstacles to be blanked out.
Typical areas of application are finger, hand or body protection, e.g. for
- Woodworking machines
- packaging machines
- Textile machines
- Storage and conveyor technology
- Pick and place machines
- Rotary transfer machines
- Palletizing machines
- Folding and bending machines
- Very short response time (6-37 ms) for minimum safety distances
- Finger protection up to 7 m, hand protection up to 24 m with 14/30 mm resolution
- Integrated safety functions (switching device, contactor monitoring, restart interlock)
- Self-diagnosis with fault display
- Line, short-circuit and cross-circuit monitoring
- Protection class IP65 for industrial environments
- Modular protective field heights up to 1900 mm
- 11 different blanking functions possible
The light curtains described here comply with safety categories Type 4 (IEC 61496), SIL 3 (IEC 61508), PL e (EN ISO 13849)
Function
The BLVT safety light curtains consist of two components: Light emitter and receiver. The distance between the two components and the overall height determine the protective field width and height. Due to the modular design, protective field heights from 100 mm to 1900 mm are available. Special sizes can be realized for installation-related intermediate dimensions.
The transmitter generates infrared light beams that are switched on and off in quick succession. The parallel light beams with a beam spacing of 7.5 mm or 14.3 mm are controlled by two microcontrollers. In the receiver, the light beams are evaluated synchronously with the transmitter. A resolution of 14 mm or 30 mm is achieved due to the beam spacing. If an object with a diameter of >= 14 mm or 30 mm is located in the protective field, i.e. at least one of the beams is obscured, the two outputs of the receiver interrupt the dangerous movement of the machine or prevent it from restarting.
Additional functions
The optional safety switching devices ULSG, LSUW NSR 3-1-K and LSUW N1-Muting K are available for additional functions such as potential-free output contacts, cycle operation or muting, as well as a programming device for blanking reprogramming.
Properties
- Blanking to hide obstacles in the protective field
- Integrated switching device, contactor monitoring and restart interlock can be activated via dip switch
- Contactors/valves can be connected directly, switching capacity 0.5 A/24 V
- Smallest obstacle detection of 14 and 30 mm, range up to 24 m
- Shortest safety distance due to short reaction times, 6 ms to 37 ms, depending on length
- 7 to 247 beams with protective field heights from 100 mm to 1900 mm
- Microcontroller monitoring of the safety functions
- Read-back semiconductor outputs with short-circuit and cross-circuit monitoring
- Muting and cycle operation with optional PLSG safety relay
- Built-in self-diagnosis with error display
- IP 65 degree of protection
Technical data
Transmitter BLVTS | Receiver BLVTE | |
|---|---|---|
Supply voltage | 24V DC SELV, +20% -10% | 24V DC SELV, +/- 20% |
Current consumption | max. 250 mA | max. 250 mA (without load) |
Outputs | - | OSSD 1 and 2: fail-safe PNP outputs; max. 0.5A short-circuit and cross-circuit monitoring (in operating mode "outputs antivalent", output 2 is not fail-safe, max. 20mA) |
Inputs | - | Inputs contactor monitoring and start button: 0V to 24V DC +/- 20%, 10 mA |
Electrical connection | integrated plug connector with PG9 as strain relief; alternatively commercially available plug connectors | integrated plug connector with PG9 as strain relief; alternatively commercially available plug connectors |
Connection cable | 3-pin max. 1.5 mm² | 5 to 7-pin (depending on operating mode) max. 1.5 mm² |
Versions
| Resolution 14 mm | Resolution 14 mm | Resolution 30 mm | Resolution 30 mm | ||
|---|---|---|---|---|---|
| Protective field height (mm)/number of beams | Overall length (mm) | Order data | Response time in ms | Order data | Response time in ms |
| 100 / 13 | 196 | BLVT 100 / 13 | 7 | BLVT 100 / 7 | 7 |
| 200 / 26 | 296 | BLVT 200 / 26 | 9 | BLVT 200 / 14 | 9 |
| 300 / 39 | 369 | BLVT 300 / 39 | 10 | BLVT 300 / 21 | 10 |
| 400 / 52 | 496 | BLVT 400 / 52 | 12 | BLVT 400 / 28 | 12 |
| 500 / 65 | 596 | BLVT 500 / 65 | 14 | BLVT 500 / 35 | 14 |
| 600 / 78 | 696 | BLVT 600 / 78 | 15 | BLVT 600 / 42 | 15 |
| 700 / 91 | 796 | BLVT 700 / 91 | 17 | BLVT 700 / 49 | 17 |
| 800 / 104 | 896 | BLVT 800 / 104 | 19 | BLVT 800 / 56 | 19 |
| 900 / 117 | 996 | BLVT 900 / 117 | 20 | BLVT 900 / 63 | 20 |
| 1000 / 130 | 1096 | BLVT 1000 / 130 | 22 | BLVT 1000 / 70 | 22 |
| 1100 / 143 | 1196 | BLVT 1100 / 143 | 24 | BLVT 1100 / 77 | 24 |
| 1200 / 156 | 1296 | BLVT 1200 / 156 | 25 | BLVT 1200 / 84 | 25 |
| 1300 / 169 | 1396 | BLVT 1300 / 169 | 27 | BLVT 1300 / 91 | 27 |
| 1400 / 182 | 1496 | BLVT 1400 / 182 | 28 | BLVT 1400 / 98 | 28 |
| 1500 / 195 | 1596 | BLVT 1500 / 195 | 30 | BLVT 1500 / 105 | 30 |
| 1600 / 208 | 1696 | BLVT 1600 / 208 | 32 | BLVT 1600 / 112 | 32 |
| 1700 / 221 | 1796 | BLVT 1700 / 221 | 33 | BLVT 1700 / 119 | 33 |
| 1800 / 234 | 1896 | BLVT 1800 / 234 | 35 | BLVT 1800 / 126 | 35 |
| 1900 / 247 | 1996 | BLVT 1900 / 247 | 37 | BLVT 1900 / 133 | 37 |
Accessories
PLSG safety control unit
The PLSG series switchgear saves costs thanks to
- Direct on-site wiring thanks to plug-in technology
Short cable runs Reduction in installation costs Saving of switch cabinet space Integrated muting lamp - Direct connection of safety components
No need for safety switching devices for emergency stop, safety gate switch, two-hand control panel or cycle controls - Minimum parameterization effort
No software required Short commissioning times Fastest replacement in the event of a fault
The muting function enables personnel protection with unhindered material flow
- Access guarding for automatic production systems
- Protection of access openings to production cells
- Protection of palletizing systems
- Conveyor and storage technology
Relay extension LSRA
Relay extension LSRA
The ULVT and BLVT series safety light barriers are equipped with electronic semiconductor outputs as standard. The LSRA plug-in relay extension module is available so that higher currents or voltages can be switched directly with the outputs. The two potential-free relay outputs of the LSRA make it easy to connect several safety light barriers or safety sensors in series. The LSRA relay extension allows the ULVT, BLVT safety light barriers to be connected to a large number of safety bus nodes.
Deflecting mirror
Mirror columns are available for free positioning of the mirrors in the room. The columns are fully equipped with mirrors in various heights, including a compensation plate. The columns are also optionally available with vibration dampers.
Pillar mounting
Mounting pillars for mirrors and light barriers are available to enable the light barriers to be set up anywhere in the room. These columns can make installation easier, especially when safeguarding access areas.
Alignment aid laser
This alignment aid laser is particularly helpful for long ranges or deflection via mirrors. The device is suitable for all the safety light barriers described here. It is attached to the light barrier with a rubber band. This makes the viewing direction of the LS visible and it can be optimally aligned with the receiver.
BLPG - Blanking programmer
Programming is carried out by pressing a key switch. The programming device is not absolutely necessary for operating the light grid and can be removed again once programming is complete. Teach-in of the beam blanking functions with BLPG via external key switch (BLVT programming device) for PLSG2/PLSG3 Save and recall up to 5 operating modes in PLSG3 Save and recall up to 5 operating modes in PLSG3 and simultaneously up to 5 beam blanking modes in BLVT light grid
BPSG - Blanking programmer with power supply
Blanking programmer and switching device like type BLPG, but with additional power supply and force-guided relay with potential-free outputs.
- Simple programming of blanking light curtains
- Connection of 24 VDC, 115 VAC or 230 VAC possible
- potential-free output contacts - top hat rail mounting
- Selector switch operation
- Device can be removed after programming
- Blanking program is stored directly in the receiver
- No PC required for programming
- Desired blanking type can be set via DIP switch
ULSG
The ULSG switching device provides potential-free output contacts and a universal power supply (optionally 230 V AC, 115 V AC or 24 V DC connection). The ULSG switching device fulfills the power failure bridging of 20 ms required by EN 60204 and is therefore suitable as a power supply for the ULVT / BLVT / TLVT / ILVT, ULCT / BLCT / TLCT / ILCT light curtains and FLSC area scanners.
- Universal power supply for light curtains
- Connection of 24 VDC, 115 VAC or 230 VAC possible
- Potential-free output contacts
- Connection for 2 to 6 light curtains
- Simple series connection with additional safety sensors
- Connection to standard safety bus nodes possible
- Cost-effective solution if 24 VDC is not available
- high switching capacity - top-hat rail mounting
FMSC-PSDI
Application
The FMSC-PSDI cycle switching device can be used to implement 1-cycle, 2-cycle or protective operation on a light barrier.
The individual operating modes can be selected via a selector switch. If the system is in the Monitor Start Point, the start button must be pressed.
Depending on the selection, the number of interruptions then occurs. The safe outputs sO1 and sO2 are enabled by pressing the start button again.
The relay optionally connected to these outputs is monitored for the switching states.
An input can optionally be used to select whether the interventions are only counted in the Motion Start Point or during the safe movement. An input can also be used to select whether a start is possible after an interruption in all positions or only in the Motion Start Point.
Additional outputs are available for displaying a monitoring error, an interrupt request, a muting signal, the motion start point and for requesting the operation of a start button.
Range of functions
Inputs:
- OSSD1/2 AOPD
- Operating mode selector switch
- Restart/start/PSDI start button
Outputs:
- 2 safe outputs
- 24V AOPD
Signal outputs:
- Restart
- PSDI Start
- Motion Start Point
- Interruption necessary
- Error
Optional:
- Contactor monitoring
- Break Count Position only in Motion Start Point
- Start at all positions
Scope of delivery
Electronic switching device FMSC-PSDI including integration proposal
Contact extensions FMSC-R and FMSC-2R
These modules extend and amplify the safety outputs of the FMSC safety-related control system. They ensure electrical isolation and enable the safe switching of different potentials and circuits - even under high loads.
- Integration of the FMSC safety control system into other potentials without any loss of safety.
- Safety circuit with 3 non-delayed, positively driven safety contacts each
FMSC-R with 1 safety circuit
FMSC-2R with 2 safety circuits. - Feedback loop for monitoring the relays on the control unit.
- Diagnostic LED for the switching status of the safety contacts
- Safety circuit to PL e in accordance with ISO 13849-1