System ULCT

Safety light curtains

ULCT - the compact safety light curtain that guarantees maximum safety even in confined machine areas. With its slim design, it offers perfect protection for applications such as press brakes, machining centers, assembly stations and injection moulding machines. Optimum safety, minimum size - for efficient protection of your production processes. With protective field heights of up to 1500 mm, ranges of up to 7 m and a resolution from 14 mm, it offers reliable finger and hand protection - even at short safety distances. Thanks to integrated safety functions such as contactor monitoring, restart interlock and self-diagnosis, the ULCT is ready for immediate use - without the need for an additional safety module. The robust IP65 design and the fast response time from 4 ms make it the ideal solution for industrial applications:

Presses for metal, wood, plastic, rubber, leather, glass processing
Filter presses
Folding and bending machines
Injection molding machines
Machining centers and welding presses
Pick and place machines
robots
Palletizing machines

Very short response time (4 ms to 29 ms) for minimum safety distances
Finger protection and hand protection up to 7 m with 14/30 mm resolution
Integrated safety functions (switchgear, contactor monitoring, restart interlock)
Self-diagnosis with error display via 7-segment display
Line, short-circuit and cross-circuit monitoring
Protection class IP65 for industrial environments
Modular protective field heights up to 1500 mm

The light curtains described here comply with safety categories Type 4 (IEC 61496), SIL 3 (IEC 61508), PL e (EN ISO 13849)

Function

The ULCT safety light curtains consist of two components: Light emitter and receiver. The distance between the two components and the overall height result in the protective field width and protective field height (Fig.).

Thanks to the modular design, protective field heights from 100 mm to 1500 mm are available in 100 mm increments. The transmitter generates infrared light beams that are switched on and off in quick succession. The parallel light beams are evaluated in the receiver by two single-chip microcontrollers. The resolution is determined by the beam distance. If an object is located in the protective field, i.e. at least one of the beams is darkened, the two outputs of the receiver interrupt the dangerous movement of the machine or prevent it from starting. In the operating mode with restart interlock, the machine can only be restarted by pressing the start button while the protective field is clear again.

Properties

Integrated switching device, contactor monitoring and restart interlock programmable without PC
Contactors/valves can be connected directly, switching capacity 0.5A/24V
Minimum safety distance thanks to short response times of 4 ms to 29 ms, depending on length
Finger protection and hand protection with a range of up to 7 m (resolution 14 mm / 30 mm)
Protective field heights from 100 mm to 1500 mm (100 mm graduation)
Microprocessor monitoring of the safety functions (self-monitoring)
Read-back semiconductor outputs with short-circuit and cross-circuit monitoring
Built-in self-diagnosis with error display via 7-segment display
Muting and cycle operation can be realized with optional safety switching device
Connection directly via M12 plug connector
Compact 25x35mm design with flexible T-slot mounting and IP65 protection class

Technical data

	Transmitter ULCT - S	Receiver ULCT - E / BLCT - E
Supply voltage	24 V DC + 20 % - 15 % SELV, PELV	24 V DC ± 20% SELV, PELV
Current consumption	max. 250 mA	max. 250 mA (without load)
Outputs	-	OSSD 1 and 2: fail-safe PNP outputs with short-circuit and cross-circuit monitoring.output current: min. 0 mA, max. 0.5 Amax. output current in off state: 50 μAmax. voltage in off state: 0.9 Vmax. capacitive load: 1 μF
Inputs	-	Contactor monitoring (EDM) and start button, 0 V to 24 V DC ±20%, max. 5 mA
Electrical connection	M12 plug connector 4-pin	M12 plug connector 8-pin

Versions

ULCT / 14 mm resolution (finger protection)			ULCT / 30 mm resolution (hand protection)
System:Protective field height / number of beams	Response time(ms)	Length(mm)	System:Protective field height / number of beams	Response time(ms)	Length(mm)
ULCT 100/12	5	161	ULCT 100/4	4	161
ULCT 200/24	6	261	ULCT 200/8	5	261
ULCT 300/36	7	361	ULCT 300/12	5	361
ULCT 400/48	8	461	ULCT 400/16	6	461
ULCT 500/60	9	561	ULCT 500/20	6	561
ULCT 600/72	10	661	ULCT 600/24	7	661
ULCT 700/84	11	761	ULCT 700/28	7	761
ULCT 800/96	12	861	ULCT 800/32	7	861
ULCT 900/108	13	961	ULCT 900/36	8	961
ULCT 1000/120	14	1061	ULCT 1000/40	8	1061
ULCT 1100/132	15	1161	ULCT 1100/44	8	1161
ULCT 1200/144	17	1261	ULCT 1200/48	9	1261
ULCT 1300/156	18	1361	ULCT 1300/52	9	1361
ULCT 1400/168	19	1461	ULCT 1400/56	10	1461
ULCT 1500/180	20	1561	ULCT 1500/60	10	1561

Accessories

BPXC - Programming device operating mode

With the BPXC operating mode programming device, the various programming modes can be programmed quickly and easily without changing the wiring. To do this, the device is connected between the supply voltage and the xLCT receiver.

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.

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

Downloads

Product category	Title	Documenttype
BLCT	BPXC	Info Manual
FMSC	FMSC-PSDI	Wiring diagram
ULCT	Profile view in CAD formats stp, igs, dxf, dwg	CAD–data
ULCT	safety light curtains	Info Manual
ULCT	Selection table for light grids	Info Manual
ULCT	ULCT-BLCT	Operating Instructions
ULCT	ULSG	Operating Instructions

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