Pepperl+Fuchs 3RG7256-3NQ00-PF, Mounting And Operating Instructions

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3RG7256­3NQ00­PF Distance sensor ­ 068­13787 / 45­3489 ­ Stand: 03/2011
Mounting and
operating instructions
43
Optical data (typ.)
Operating range 250 to 750 mm
Measuring range 500 mm
Resolution
<0.1% of measuring range
Linearity
<0.25% of measuring range
Light used Pulsed laser light, red 650 nm, MTBF>50,000h *1
Pulse width Tp = 20 µs
Pulse repetition frequency f = 2.5 kHz
Max. pulse output Pp = <1.65 mW
Size of light spot See Illustr. 4
Ambient light Constant light 5000 lux as per EN 60947­5­2
Laser class 2 (EN 60825/1)
Electrical data (typ.)
Operating voltage U
B
18­30 V DC *
2
Power consumption (no load)
≤ 40 mA at 24 V DC
Signal outputs Q
1
/Q
2
(PNP, N.O./ N.C. selectable)
Output current Q
1
, Q
2
≤ 100 mA
Switching frequency Q
1
, Q
2
≤ 1 kHz
Response time Q
1
, Q
2,
Q
A
0.4 ms (when averaging = off) / 4ms / 40ms
Maximum capacitive load Q
1
, Q
2
< 100 nF
Pulse stretching Q
1
, Q
2
50 ms (when activated)
Analogue output Q
A
4­20 mA*
3
Interface RS485 half­duplex
Temperature drift
< 0.02% / °C
Protective circuits Reverse battery protection, short circuit protection (not RS 485)
VDE protection class *
4
Stand­by delay
≤ 300 ms
Mechanical data (typ.)
Housing material PBT
Front screen PMMA
Protection IP 67*
5
Ambient temperature range
-10 to +60 °C
Storage temperature range
-20 to +80 °C
Connection M12 connector, 8­pin
Weight approx. 107 g
*1 at ambient temperature : +40 °C
*2 limit values
*3 recommended burden < 500 Ohm (apparent ohmic resistance )
*4 rating 50V DC
*5 with attached connector