LaserGuard2 Instruction Manual
April 2015
Page 7 of 31
2. General System Information
2.1.
LaserGuard2 Model Numbers
LG2 – H – 4 – XX
2.2.
Class 1 Laser Device
The Magnetek Collision Avoidance System contains a Class 1 laser with a 660 nm wavelength. Although
the laser is eye-safe, it is recommended that no one look directly into the laser with their eye close to the
lens of the laser unit. Do not open the laser unit to service it since there are no serviceable parts inside.
2.3.
Laser Collision Avoidance System Description
Magnetek's Collision Avoidance System measures the distance between the laser unit's lens and its
companion retro-reflective target by means of pulse ranging technology that allows for very accurate
measurements and energy efficiency. The laser communicates with the Laser Support Unit (LSU) by
means of a 4 mA to 20 mA current loop. This type of communications link has very high noise immunity
and provides the necessary accuracy for a collision avoidance system. The laser used in the
LaserGuard2 system is set to measure distances from 8 in. to 150 ft. with an output current of 4 mA at 8
in. and 20 mA at 150 ft. The laser has a visible light beam, which makes system alignment very easy. On
the front and top of the laser are two LEDs; these LEDs indicate power and alignment. A steady green
light indicates power to the laser. In the event of a laser short circuit, that green LED will flash at 4Hz. An
amber light indicates the target is acquired and reading a signal.
Figure 1: Laser Optical Unit
4 = NEMA 4 Enclosure
4X = NEMA 4X Enclosure
H = High Voltage (85-264 VAC or 120-370 VDC)
L = Low Voltage (9-36 VDC)
Optional
25 = 25m cable
40 = 40m cable
75 = 75m cable
