KEYENCE LV Series - Manual (Page 8)

8 LV Series-IM_E
The LV Series is equipped with a mutual interference suppression function. Please
note, however, that this mutual interference suppression function will not work when
two main units are used together.
A short circuit between the purple and blue conductors will cause laser radiation to
be interrupted (min. input time: 20 ms).
Amplifier unit
(1) For use with FS-R0 as main unit. If you wish to use the QL-R01 as the main unit, contact KEYENCE.
(2) No control output cable for LV-20A
(3) The power for LV-20A/22A/22AP/52/52P is supplied from the main unit.
(4) With additional units connected, the allowable ambient temperature range varies as follows.
2 to 5 units connected: -10 to +50°C (14 to 122°F)
6 to 7 units connected: -10 to +45°C (14 to 113°F)
To connect additional units they must be mounted on a DIN rail (metal DIN rail). Make sure that output current is 20 mA. max.
Note also that the expansion unit cannot be used as it is.
Caution on usage of QL (LV-20A only)
• When you want to monitor the received light intensity in a PLC
using the KEYENCE QL-R01, note that the indication will be
limited in the range of 0 to 4095, and that the threshold value
that can be written in LV using the QL-R01 is up to 4095
(common to all of FINE, TURBO and SUPER TURBO).
• Monitoring of the received light intensity and writing of the
threshold value using QL-R01 are possible in the LV-20A only.
• Up to eight expansion units can be mounted on the QL-R01
provided all the expansion units are the LV-20A. Refer to
"Mounting additional amplifier" (page 4) and the instruction
manual for the QL-R01.
• LV requires two QL channels because a single LV unit has two
output channels.
• Restrictions due to compliance with EMC Directive:
When linking four LVs or more to the QL-R01, install a ferrite
core to the root of the QL-R01 cable.
Important
Mutual Interference Suppression
When additional sensor head units are installed, mutual
interference suppression allows the units to be positioned close
together. The number of units with which mutual interference
suppression will work depends on the selected power mode.
* Total (main unit plus expansion units
Interruption of Laser Radiation
This function is available only with the main unit.
Even when expansion units (LV-22A/22AP/52/52P) are connected,
laser radiation stops only from the main unit.
Point
Power mode FINE TURBO SUPER
No. of units free Not possible 2* 4*
LV-11A/21A/51M LV-21AP/51MP
Ma
in cir
cui
t
Ma
in cir
cui
t
(Short circuit current 1 mA max.) (Short circuit current 2 mA max.)
5 V DC
12-24 V DC
Brown
Purple
Brown
Purple
Point
Specifications
Model
NPN output LV-21A LV-22A LV-20A LV-11A LV-51M LV-52
PNP output LV-21AP LV-22AP - - LV-51MP LV-52P
Supported sensor head LV-H32/H35/H37/H42/H47/H52/H62/H64/H65/H67/H35F/H62F LV-H41/H51 LV-H100/H110/H300
Laser Class
FDA (CDRH) 21CFR Part1040.10 Class II Laser Product
Class I Laser
Product
Class II Laser Product
IEC60825-1 Class 2 Laser Product
Class 1 Laser
Product
Class 2 Laser Product
Main unit/expansion unit Main unit
Expansion unit
(1 line)
Expansion unit
(0 line)
Main unit Main unit
Expansion unit
(1 line)
Response time
FINE: 80 μs
TURBO: 500 μs
SUPER: 4 ms
280 μs to 4.7 ms (1)
FINE: 500 μs
TURBO: 2 ms
SUPER: 8 ms
FINE : 80 μs
TURBO: 500 μs
SUPER: 4 ms
Operation mode LIGHT-ON/DARK-ON (switch selectable)
Indicators Output display x 2, Digital LED monitor (light intensity monitor, setting monitor), Bar LED monitor, Laser ON alarm indicator
Detection modes
STANDARD 1, STANDARD 2, UP edge, DOWN edge, separate settings for ch A/B
(Except the mode in which the standard light intensity setting is in progress)
Timer function OFF DELAY/ON DELAY/ONE SHOT, separate settings for ch A/B, timer 1 to 9999 ms variable
Laser emission stop input Stop during laser radiation, input time: at least 20 ms.(Main unit only)
External tuning input Input time: at least 20 ms (LV-51M/51MP do not support this item)
Control output (2)
NPN output NPN open-collector x 2 ch, max. 100 mA (40 V max.), residual voltage 1 max.
PNP output PNP open-collector x 2 ch, max. 100 mA (30 V max.), residual voltage 1 max.
Analog output for monitor 1 to 4 V voltage output, 1 to 4 V across load resistance of at least 20 k Ω for FINE indication 0 to 3000 (LV-51M/51MP only)
Protection circuit Reverse-polarity protection, overcurrent protection, surge absorber
Rating
Power voltage DC 12 to 24V ±10% max., Ripple (P-P) 10% max. (3)
Power consumption
(current consumption)
1.5 W (12 V:125 mA, 24 V:62.5 mA)
Environmental
resistance
Ambient temperature -10 to +55 °C (14 to 131 °F), No freezing (4)
Relative humidity 35 to 85%, No condensation
Vibration resistance 10 to 55 Hz, 1.5 mm double-amplitude in X, Y, and Z direction: 2 hours per axis
Materials Main body & cover: Polycarbonate
Weight (incl. 2-m cable) Approx. 120 g Approx. 75 g Approx. 35 g Approx. 120 g Approx. 120 g Approx. 75 g