DATASENSOR -NEWS RELEASE
DATASENSOR -NEWS RELEASE |
|
|
For Additional Information Contact:
|
Markham,ON—March 22, 2005—The DATASENSOR range of optoelectronic safety light curtains is enriched with new models and advanced functions thanks to the SE4-PLUS series, offering versions with 14 mm resolution for finger protection and versions with 30 mm resolution for hand protection.
The main differences of the SE4-PLUS series with respect to the basic SE4 series are highlighted below:
- New functions available: EDM, Blanking and Cascade
- New 105 and 120 cm heights for finger protection
The detection heights available for the new SE4-PLUS series range from 15 to
120 cm for finger protection models and from 15 to 165 cm for hand protection
models. Furthermore, the alignment procedure has been improved to facilitate
use and installation. All the new models of the SE4-PLUS series are ‘Type
4’ safety light curtains, according to the EN-954-1 Standard. Thus two
microprocessors are available for the control and management of the emitted
and received beams, two PNP outputs and a beam with a 2.5° effective aperture
angle.The SE4-PLUS safety light curtains are composed of multibeam emitting
and receiving units with optical synchronisation, conforming to the international
Standards in force, in particular to IEC 61496-1 and IEC 61496-2. The SE4-PLUS
device have been certified by the TÜV Competent Body of Münich, Germany.
These devices introduce brand new functions that complete the existing range,
making the DATASENSOR safety range the most complete and competitive present
today on the market. Five different versions are available according to the
functions:
- Version with only EDM
- Version with Blanking
- Cascade version with Master function
- Cascade version with Master and Blanking function
- Cascade version with Slave function
The EDM (External Device Monitoring) function is now available on all five
new versions. This function allows the safety light curtain to control the status
of external devices connected to the machine-stop circuits. These external devices
are generally Final Switching Devices (FSD) or machine primary control elements
(MPCE).
This function is particularly useful when the light curtains is not connected
to the machine-stop circuits by means of auto-guided safety relays but with
force-guided contact relays. Relay failure would not be detected in similar
situations without the EDM function and so machine safety is jeopardised.
Blanking is defined as a safety device configuration that guarantees the presence of an object in a specific area does not stop the functioning of the controlled machine. ‘Fixed Blanking’ is when this area does not change during machine functioning. ‘Floating Blanking’ if the blanking area follows the movement of the worked object. The data detection within the area to deactivate in the Fixed Blanking mode is carried-out using a simple Teach-in procedure that requires the obscured beams involved in Blanking.
Differently form the Fixed Blanking function, where all beams can be deactivated with the exception of the last beam (necessary for the optical synchronisation of the TX and RX units), the Floating Blanking function can involve 1, 2 or 3 adjacent beams. Floating Blanking provokes a device resolution reduction and consequently the safety distance has to be recalculated.
The SE4-PLUS light curtains with Blanking have a lamp inside the receiver’s top cap. This yellow-coloured lamp blinks during the activation of the Floating Blanking function, to indicate the resolution reduction and thus the safety level reduction.
Typical applications of the Blanking function are mainly tool machines and metal working machines, with frequent and/or repetitive material passage. Another application where the use of safety devices with Blanking is recommended is on machine applications where fixed obstacles are present (machine components, projections, supports, etc.) in a certain zone within the controlled area.
In the versions with Cascade configuration, two safety light curtains are connected to each other with the Master-Slave communication protocol. Consequently the safety information gathered from two different sections of the controlled machine can be combined.
Typically these sections are perpendicular to each other, and so the ‘L’
configuration definition is more appropriate.
The main feature distinguishing the Master unit from the Slave unit is the presence
of the OSSD (Output Signal Switching Devices) outputs missing on the Slave.
The Slave unit does not have output relays and so only the Master guides the
outputs according to its status and that of the connected Slave.
The Master and Slave configuration is carried-out connecting the Master emitter and receiver with the corresponding Slave units using the additional M12 5-pole connector positioned on the bottom of the light curtain.
Besides the EDM, Blanking and Cascade functions, the SE4-PLUS series also presents:
- Extremely compact 35x40 mm dimensions without the need of external control
devices, with IP65 mechanical protection degree;
- Device configuration using dip-switches positioned inside the receiver front
necessary for setting the Blanking and EDM functions as well as the manual or
automatic reset mode;
- Signalling LEDs indicate the device status, alignment of free/interrupted
beams and any failures;
- Integrated Blanking lamps for the signalling of the Floating Blanking activation;
- Simple electrical connections using the two 8-pole and 4-pole M12 connectors
respectively for the receiver and emitter;
- For the Cascade versions the Master also has an additional 5-pole M12 connector
while the Slave has one single 5-pole M12 connector;
- Shielded cables of the SV series with different lengths are available as accessories;
Datasensor photoelectric detection devices are represented and sold in Canada by Chartwell Electronics Inc., 140 Duffield Dr., Markham, Ontario. L6G 1B5. For technical information, contact Chartwell Application Engineering, 905-513-7100, Sales@Chartwell.ca .