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QM42 & QMT42 Series
Overview
- Features compact, low-cost dc sensors in NEMA 6 (IEC IP67) die-cast housings
- Delivers outstanding immunity to electrical noise
- QM42 series: Available in opposed, polarized retroreflective, diffuse, short-range adjustable-field and plastic fiber optic sensing modes
- QMT42 series (slightly larger): Available in diffuse, fixed-field and long-range adjustable-field sensing modes
- Offers the longest range—6 m—for any diffuse sensor on the market (QMT42)
- Includes marginal gain and Power ON indicator
Product Specifications
| Supply Voltage and Current | 10 to 30V dc (10% max. ripple)
Opposed Emitters:less than 30 mA Opposed Receivers:less than 10 mA Polarized Retroreflective and Diffuse (short range):less than 20 mA Fixed-field and Diffuse (long range):less than 40 mA Adjustable-field:less than 50 mA Fiber Optic:less than 30 mA |
|---|---|
| Range | QM42: Opposed:10 m
Polarized Retroreflective:3 m, range is specified using one model BRT-3 retroreflector
Diffuse (short range):400 mm
Adjustable-field (short range):5 mm to cutoff point (adj. between 50-150 mm)
Plastic Fiber Optic:Range varies by sensing mode and fiber optics used
QMT42:Diffuse (long range):10 mm-6 m
Fixed-field:50-500, 50-750, 50-1000, 50-1500 or 50-2000 cutoff, depending on model
Adjustable-field (long range):25 mm to cutoff point (adj. between 50-150 mm)
|
| Sensing Beam | Opposed, Diffuse, Polarized Retroreflective, Fixed-field and Fiber Optic:Infrared, 880 nm; Visible Red, 660 nm Adjustable-field:Visible Red, 680 nm |
| Output Configuration | Solid-state complementary (SPDT) switch:NPN (current sinking) or PNP (current sourcing), depending on model |
| Output Rating | 100 mA max. (each output)
OFF-state leakage:less than 5 µA @ 30V dc ON-state saturation voltage:less than 1V @ 10 mA dc; less than 1.5V @ 100 mA dc |
| Output Protection Circuitry | Protected against false pulse on power-up and continuous overload or short circuit of outputs; Overload trip point greater than or equal to 150 mA, typical @ 20° C |
| Output Response Time | Response time is independent of signal strength
Opposed:100 milliseconds ON; 0.5 milliseconds OFF Diffuse, Polarized Retroreflective, Adjustable-field and Fixed-field:1 millisecond ON/OFF Fiber Optic:0.25 millisecond ON/OFF |
| Repeatability | Repeatability is independent of signal strength.
Opposed:120 microseconds Diffuse, Polarized Retroreflective, Adjustable-field and Fixed-field:250 microseconds Fiber Optic:60 microseconds |
| Sensing Hysteresis | Diffuse (long range):less than 20% of set sensing distance Adjustable-field:less than 7% of set cutoff distance Fixed-field: 2000 mm:less than 5% of set cutoff distance
1500 mm:less than 4% of set cutoff distance
1000 mm:less than 3% of set cutoff distance
750 mm:less than 2% of set cutoff distance
500 mm:less than 1% of set cutoff distance
|
| Cutoff Point Tolerance | Fixed-field:±10% of nominal cutoff distance |
| Adjustments | Fixed-field and Emitters:No adjustments Diffuse (long range):4-turn slotted sensitivity (Gain) adjustment potentiometer (clutched at both ends of travel) Adjustable-field (150 mm):12-turn slotted brass cutoff distance adjustment potentiometer (clutched at both ends of travel) Adjustable-field (400 mm):15-turn slotted brass cutoff distance adjustment potentiometer (clutched at both ends of travel) All others:15-turn slotted brass cutoff distance adjustment potentiometer (clutched at both ends of travel) |
| Indicators | 2 LED Indicators:Green and Yellow Green ON steady:power to sensor is ON
Green flashing:output is overloaded
Yellow ON steady:light sensed, light-operate (LO) output is energized
Yellow flashing:marginal excess gain (1-1.5x) in light condition
|
| Construction | Housing are die-cast zinc alloy with black acrylic polyurethane finish; lenses are acrylic |
| Environmental Rating | IP67; NEMA 6 |
| Connections | 2 m or 9 m attached cable, or 4-pin Euro-style quick-disconnect fitting. QD cables are ordered separately. |
| Operating Conditions | Temperature: Diffuse (long range), Adjustable-field and Fixed-field:-20° to +55° C
All others:-20° to +70° C
Relative humidity:90% @ 50° C (non-condensing) |
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