PRECISION & HEAVY DUTY LIMIT SWITCHES

Max. Min.

Operating Data

Heavy Duty Limit SwitchesBCH Limit Switches are designed with one aim only to help you produce better...faster... with less production down time. These limit switches will keep operating in highly contaminated atmospheres and extremely high shock and vibration conditions. Every limit switch that comes off the Bhartia Cutler-Hammer assembly line passes through rigid quality tests before it reaches you ...

Versions 1NO + 1NC 2NO + 2NC Screw Terminal Pre-cabled

Operating HeadType NL Limit Switches are available with a variety of operating heads to meet diverse applications.

Rotary lever operating headsThese heads, which are of the spring return variety, with rotary shafts, can be readily changed on the job to operate clockwise, counter clockwise or in both directions. Operating levers may be rotated and locked on the rotary shaft in any one position, through 3600. The operating head is adjustable in four 900 apart positions. The levers are provided with 19mm dia. metal rollers. Two types of roller lever operators, with a fixed length of 38mm and 76.2mm, are available. A third type had an adjustable length between 32mm and 82.5mm.

Top push operating headsThese are available in two designs. One has an adjustable push button, the length of which can be adjusted up to 8 mm. The second type has a metal roller of 11.1mm diameter.

Side push operating headThe head is also available with an adjustable push button alternatively a metal roller of 11.1mm dia. These are designed for small space and low travel application where the actuator travel is perpendicular to the switch.

Cat whisker operating head (Nylon & Steel Rod)This head has been designed for applications where extremely low operating force is available. The operator consists of a nylon covered wire/steel rod, which is a spring return switch moving the extension in any direction from the centre operates the contacts.

Contact block The contact mechanism is enclosed in a phenolic moulding with a transparent thermoplastic front cover. The complete unit can be removed and released without the risk of changing the operating characteristic of the limit switch.

The single pole double throw, twin break silver contacts (normally open / normally closed change over) provide quick make, quick break action and full contact pressure at all times. There is no point of zero contact pressure - no matter how slowly the switch is operated.

Both the normally open and normally closed contacts can be used simultaneously, provided they are connected on the same polarity.

The IP 67 degree conformity makes it more suitable for all adverse applications.

NLL1, NLL2

LTPR

LSPR LCW

LLGS

LPGS

NLLA, NLJW

LTPBA LSPRH

(mm)

(mm) TYPES

(mm) LSPBA

(mm)

Travel to Trip A 7-12o 1.3 2.0 20o 4.5 3.5 Travel to reset from trip point B 6o 1.1 1.7 18o 2.5 2.0 Over Travel C 34 5.5 5.1 5o 2.5 1.0Total Travel D 45 6.8 7.0 25o 7.0 4.5Force to Trip (max.) Kg. 1.0 2.0 2.0 0.285 1.5 1.5Force to be applied at a radius of (mm) 28 - - 25.5 - -

B - Button R - Roller

Electrical and Mechanical RatingsUtilisation Category : AC15 & DC13 as per IEC947-5 IS 13947-5Thermal Current (Ith) : 10AInsulation Voltage (Ui) : 600 V AC 240 V DC

Operational Current and VoltageAC15 rating

Contact Combination : 1NO + 1NC, 2NO + 2NCFrequency of Operation : 2500 operations per hourMechanical Life : 20 x 106 operationsEnclosed Category : Zinc die cast enclosure to IP67 Terminal Capacity : 2.5 mm2 solid or stranded

DC13 rating

Voltage 110V 220V 440V 550VRating 6.0A 3.0A 1.5A 1.2A

Voltage 24V 60V 110V 220VRating 1.0A 0.5A 0.2A 0.1A

Linear Motion

Angular Motion

TYPE DESCRIPTION CAT. NO SCREW CAT. NO. SCREW TERMINAL PRECABLED TERMINAL PRECABLED CAT NO. CAT NO. (1NO+1NC) (1NO+1NC) (2NO+2NC) (2NO+2NC)

Standard-38mm NLL1 NLL1C NLL1-22 NLL1-22C Standard-76.2mm NLL2 NLL2C NLL2-22 NLL2-22C Adjustable NLLA NLL4C NLLA-22 NLLA-22C Roller Lever

Maintained Type LL1 NLL1M NLL1MC NLL1M-22 NLL1M-22C Maintained Type LL2 NLL2M NLL2MC NLL2M-22 NLL2M-22C Maintained Type LLA NLLAM NLL4MC NLLAM-22 NLLAM-22C Push Roller Top NLTPR NLTPRC NLTPR-22 NLTPR-22C Side NLSPR NLSPRC NLSPR-22 NLSPR-22C Push Button Top Adjustable NLTPBA NLTPBAC NLTPBA-22 NLTPBA-22C Side Adjustable NLSPBA NLSPBAC NLSPBA-22 NLSPBA-22C Cat Whisker Nylon Rod NLCW NLCWC NLCW-22 NLCW-22C Steel Rod NLJW NLJWC NLJW-22 NLJW-22C Fork Type Roller in same Line NLLF NLLFC NLLF-22 NLLF-22C Offset Rollers NLLFO NLLFOC NLLFO-22 NLLFO-22C Rolleer in same line NLLFM NLLFMC NLLFOM-22 NLLFOM-22C Maintained Offset Rollers NLLFOM NLLFOMC NLLFM-22 NLLFM-22C General Angular Roller LLGS Purpose Top Plunger LPGS - - -

Spares DESCRIPTION CATALOGUE CODE 38 mm Lever SP40L1 76.2 mm Lever SP40L2 Adjustable Lever SP40LA Operating Head SP40HLG Operating Head SP40HL Operating Head SP40HTP B or R Operating Head SP40HSP B or R Operating Head with Lever SP40CW Limit Switch Assembly SP40S1 Operating Head in Line SP40LF Operatng Head Offset SP40LFO Operating Head Maintained SP40HLM

Wiring Diagram

Must be same polarity

Must be same polarity

11

11 12

14

21

21 22

24

15

15 16

18

1NO

+ 1

NC

2NO

+ 2

NC

RESET FROM TRIP

500 TOTAL THROW

OVER TRAVEL

500 D

TRIPCA

B

A = Travel to tripB = Travel to reset from trip pointC = Over travelD = Total travel

CD

B A

Pilot Devices & Limit SwitchesHeavy Duty Limit Switch - Snap Action Type NL

Weights :Oil Tight Limit Switches (except type LLG) : 500 gms.General Purpose Limit Switch (LLG) : 300 gms.

M 24 X 1.52 THDS.

22º

20.57 DIA.

R 0.8 MAX.

M 20 X 1.5P. THDS.0.25R

R 0.8 MAX.

10.4

10.4

39.7

30.35

NF

+ 0.2513.50 DIA.

10.25

4.00

15.9

2 HOL

ES 5

DIA.

FOR

FRO

NTMO

UNTI

NG

12.7

6.459

.5

97.5

9

M 20 X 1.5P. THDS.

22.246

29.4

39.744.0 M5 TAPPED 2 HOLES

9.5 DEEP FOR REAR MTG.

72

2.0

7.1

12.7 44.5

74.0

STEEL ROD WHISKER TYPE (JW)

156.0

MAX

.

134.0

19.5

107.7

10.7

27.4

7.16

DIA.

MAX.

95.3

R.

13.2

9.7

4.81.522.9

2.0

HEX.SOCKET SIZE - 4mm

ADJUSTABLE LEVER TYPE (LA)

9.4

8.119.0DIA. 19.0

DIA.

15.9

11.0

76.2

4.0

6.4 9.5

7.0 19.0DIA.

8.0

5.0

15.9

11.0

38.0

6.4 9.5

ROLLER LEVER TYPE (L1 - L2)

19.88.7

2.7 8 MA

X. A

DJUS

TMEN

T

12.7

43.6

19.84

11.1

DIA

51.6

TOP PUSH BUTTONADJUSTABLE TYPE (TPBA)

TOP PUSH ROLLERTYPE (TPR)

SIDE PUSH ROLLER (VERTICAL)

45.2 11.1

DIA

19.8

12.7 26

.0

SIDE PUSH ROLLER (HORIZONTAL) TYPE (SPRH)

45.219.8

GENERAL PURPOSE LIMIT SWITCHES16.0

7.0

55.0

19.0 DIAROLLER

ROLLER LEVERTYPE (GS)

Surface Mounted Side Operated

SIDE PUSH BUTTON ADJUSTABLE TYPE (SPBA)

8 MAX. ADJUSTMENT DIA.

19.8

2.4

2.7

8.712

.7

35.5

39.7

NYLON CUT WHISKERSTYPE (CW)

3.2DIA

19.8

130.0

6.3 DIAPLUNGER 16.0

87.0

4.481

.0

2.5 42.517.0

4.0 56.0

21.0

6.0

50.0

4.0

26.0

¾" D

IA. 3

COND

UTEN

TRY

4.4 D

IA. M

TG.

HOLE

S.

40.0

TOP PLUNGERTYPE (PGS)

Dimensions

Conduit Entry

DC13 RATING SINGLE DOUBLE SINGLE DOUBLE THROW THROW THROW THROW 115V 2.0A 0.50A 1.0A 0.2A 230V 0.5A 0.20A 0.3A 0.1A 600V 0.1A 0.02A 0.1A -

Precision Limit Switches are designed for industrial applications. These are small in size, reliable in operation, have exceptionally long life and are accurate. The wide variety of switch operating mechanisms coupled with the choice of either single pole 1NO + 1NC or double pole 2NO + 2NC changeover contacts permit easy selection and application for many needs.

Contact Mechanism Quick make & quick break action. Low bounce mechanisms. Long life on high load applications. Serrated-silver stationary contacts, definite wiping action and high contact pressure assure reliability on dry circuit applications. Semi dust-tight moulded, phenolic case of great physical strength and high arc-resisting capacity.

VersatileA wide variety of operators are available for use in combination with the basic switch. These operators with individual mounting variations afford a high degree of versatility.

Electrical and Mechanical ratingsUtilisation category : AC 15 and DC 13 as perIEC 337-1 and IS : 6875Thermal current (Ith) : 15 AInsulation voltage (Ui) : 600 V AC

Types Of OperatorsPush Button PlungerThese are designed for one hole panel mounting. The plunger mechanism is of oil-tight construction and prevents any ingress of oil, including coolant. These operations are designed for an in-line actuating motion with controlled over-travel.

Top Push Roller PlungerOperators are designed for one hole mounting and are of oil-tight construction. The roller plunger comes assembled either in line with the length of the contact block or at right angles to it. This allows the roller to accept cam or slide operation from any of the four directions.

Six Inch (150 mm) LeverThese operators provide either top and right hand mounting or top and left hand mounting. with this do-it-yourself operator, the lever may be formed by the user to satisfy unusual requirements and can be cut or bent to any desired length or shape.

Roller LeverThese operators are available with either top and right hand mounting or top and left hand mounting and are equipped with a steel roller which may be operated by a cam or some similar actuating device. Operation is provided in both directions.

SINGLE POLE DOUBLE POLE AC15 RATING (1NO + 1NC (2NO + 2 NC CHANGEOVER CHANGEOVER CONTACTS) CONTACTS) 110V 4.0A 3.0A 240V 2.0A 1.5A 440V 1.0A 0.8A 600V 0.8A 0.6A

Mechanical & : 20x106 operations without operatorelectrical life 10x106 operations with operatorTerminal capacity : 2.5mm2 solid or stranded conductorsFrequency of operation : 2500 operations per hour (max.)

DESCRIPTION CATALOGUE CODE 1NO + 1NC 2NO + 2NC

With Top Push Button Operator PSTPB PSTPB2With Top Push Roller Operator PSTPRA PSTPR2Aassembled in line with contact blockWith Top Push Roller Operator PSTPRB PSTPR2Bassembled at right angles tocontact blockWith Six Inch Lever Operator PSSILR PSSIL2R(right hand mounting) With Six Inch Lever Operator PSSILL PSSIL2L(left hand mounting)With Roller Lever Operator PSRLR PSRL2R(right hand mounting)With Roller Lever Operator PSRLL PSRL2L(left hand mounting)Without Operator SP20S1 SP20S2

Operational currentand voltage Selection Chart

Precision Limit Switches

The Repeat Accuracy Of Individual

2.0

2.38

35.0

MAX.

1.20

19.85 26

.8025

.68

6.25 m

m

4.06

1.50

8.0 DIA.

MINIMUM STROKE REQD.TO OPERATE SWITCH

M12 X 0.75 PITCH12.50 HOLE REQD.TO MOUNT SWITCH

LOCK WASHER

HEX. LOCK NUTS

BUSHING SEAL SUPPLIED ONOIL RESISTANCE SWITCHES ONLY

MTG. PLATE

18.2563.0

LOCKING RING

PUSH

BUT

TON

OPER

ATOR

MAX.

26.50

20.75

11.1 DIA.46.8

19.8

9.5

25 -

4

10.5

50.058.7466.0

71.4479.5

TOP & REAR MTG.

17.46

14.5

NOM.

UP

10.3R14.0

1.614.3

24.6

4 MTG. HOLES4.04 DIA. R.H. MOUNTING

ROLL

ER L

EVER

NOM. FULL STROKE DOWN 4 MTG. HOLES 4.04 DIA.

6.35

14.31.6

24.6R.H. MOUNTING

50.058.7466.0

71.4479.5

TOP & REAR MTG.

19.0

NOM.

UF31

17.46

14.5

10.5

4

SIX

INCH

(150

mm

) LEV

ER

M12 X 0.75 PITCH12.50 HOLE REQD.TO MOUNT SWITCH

4.76

2.0

2.38

1.20 M

AX.

35.0

MAX.

19.85 39.04

0.78

6.35 N

OM.

2.38

FULL

STRO

KE

HEXLOCK NUTMTG. PLATE LOCATION

11.1 DIA.

LOCKING RING

20.7526.50MAX.63.0

18.25

BUSHING SEAL SUPPLIED ONROLL

ER P

LUNG

ER

OIL RESISTANCE SWITCHES ONLY

OPERATING PRESSURE min. 0.387 Kg. max. 0.595 Kg

FULL STROKEPRETRAVEL

1.73-2.365.05Max. 3.56-4.65

TRIP POINTOVERTRAVEL

NORMAL

1.57

RESET OVERTRAVEL

DIFFERENTIAL (TRIP TO TRIP) 1-27 Max.

2.41-3.18mm

0.89mm min.RESET - POINT

The repeat accuracy of individual switch trip points is such that after millions of operations they do not drift more than two or three thousands of an inch.

IND

-CO

NTR

OL/

LIM

ITSW

ITC

H/3

000/

JAN

'06

RP /

5,00

0 / J

an. '

08