7 QZ 70 en 3
1 GENERAL
1.1 Introduction
This manual provides essential information on the Neles
Quartz limit switches.
The Neles Quartz limit switches are used for indication
of the electrical position of valves and other devices.
1.2 Markings
The limit switch has an identification plate attached to
the cover, see Fig. 1.
Identification plate markings:
❑ Model
❑ Serial number
❑ Date
❑ Sensor rating
❑ Transmitter rating
❑ Note
❑ Warning
❑ Protection class information
❑ CE and EX marks
❑ Metso logo
1.3 Specifications
All models
Materials
Housing and cover Epoxy coated anodized marine
grade aluminum
Clear cover and
indicator Lexan
®
polycarbonate
Elastomer seals Buna-N, optional Viton and EPDM
Drive shaft Stainless steel
Drive bushing Brass, oil impregnated
Fasteners Stainless steel
Unit weights
With aluminum cover
Short 1.27 kg / 2.80 lb
Medium 1.55 kg / 3.42 lb
Tall 1.75 kg / 3.85 lb
With clear cover
Short 1.20 kg / 2.64 lb
Medium 1.27 kg / 2.79 lb
Tall 1.39 kg / 3.06 lb
Certifications and Approvals
Explosion Proof (QX_)
ATEX II 2 G c T5 Ex d IIC T5
cFMus Class I, Div. 1, Groups BCD
Class II, Div. 1, Groups EFG
Nonincendive (QN_)
ATEX II 1 G, EEx nA IIC T5
cFMus Class I, Div. 2, Groups ABCD
Class II, Div. 2, Groups FG
Intrinsically Safe (QN_)
ATEX II 1 G, EEx ia IIC T5
cFMus Class I, Div. 1 and 2, Groups ABCD
Class II, Div. 1 and 2, Groups EFG
Enclosure Protection
ATEX IP67
NEC/CEC 4, 4X & 6
All electrical components are CE compliant.
Inductive proximity sensors
Dual Module SST Sensor (33)
Outputs: 2 cam selectable
NO or Hold Closed
Maximum current:
Inrush 2.0 A / 125 V AC/DC
Continuous 0.3 A / 125 V AC/DC
Voltage range: 8 to 125 V DC, 24 to 125 V AC
Minimum on current: 2.0 mA
Temperature range: -40 °C to 80 °C
Leakage current:
DC circuits 0.15 mA
AC circuits 0.25 mA
Max voltage drop 6.5 V / 10 mA
7.5 V / 100mA
Operating life: Unlimited
SST sensor (X)
Voltage Range: 8 to 125 VD C/24-125 V AC
Inrush Current: 2.0 A at 125 V AC/V DC (max)
Continuous Current: 0.3 A at 125 V AC/V DC
Minimum On Current: 2.0 mA
Current Leakage: Less than 0.25 mA
Maximum Voltage Drop: 6.5 V at 10 mA
7.0 V at 100 mA
Temp. Range: -40 °C to 80 °C
Operating Life: Unlimited
P+F sensor (E)
Type NBB2-V3-E0-V5
Configuration NPN, 3-wire type
Operating voltage 10 to 30 V DC
Current ratings 100 mA
Temperature range -25 °C to +80 °C/-13 °F to +176 °F
P+F sensor (F)
Type NBB2-V3-E2-V5
Configuration PNP, 3-wire type
Operating voltage 10 to 30 V DC
Current ratings 100 mA
Temperature range -25 °C to +70 °C/-13 °F to +158 °F
Fig. 1 Identification plate
Warning: Do not open when an explosive atmospere may be present.
To reduce the risk of electrostatic sparking,
the equipment shall be cleaned only with a damp cloth.
448087
Fergus Falls, MN, U.S.A. US Patent 4,962,290
DatelaireSledoM
0.3A @ 8-125 VDC, 24-125 VAC
Transmitter (If installed): 4-20mA; 10-40 VDC
Note: In ambient temp over 64°C use field wiring rated 90°C or greater.
In ambient temp over 74°C use field wiring rated 100°C or greater.
Ex d IIC T5 (Ta = -
40°C to + 80°C) IP67
1725
II 2 G c T5
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General