Standard Heavy Duty Limit Switches M New od els Heavy duty limit switches with snap-action contacts and positive break according to BS/EN60947-5-1. ■ Bifurcated contacts for low resistance and high reliability – suitable for switching low-level electronic currents ■ Double-break contacts with electrically separate NO and NC circuits in conformity with VDE 0660 part 206 ■ 10A 500VAC/600VDC rated ■ Lever types can be user-set to switch by clockwise movement only, anti-clockwise only or both ■ Turret head position rotatable in 90˚ increments ■ Centre-position indicator arrow – lever actuators ■ Wide range of actuators ■ Single and triple cable entry models ■ Removable contact block for ease of wiring ■ Metal or plastic housing options ■ IP66 according to BS EN60947-1 ■ FD and FP dimensions in accordance with EN50041 ■ Approvals: UL, CSA FD/FP/FL Options and ordering codes FD 5 01 Heavy duty metal housing FD Heavy duty plastic housing FP Triple entry metal housing FL 38 Lift-style turret with 75˚ total travel Snap-action contacts, 1NO + 1NC 5 385 Lift-style turret with 90˚ total travel Slow-action, break before make 1NO + 1NC 6 Slow-action, make before break 1NO + 1NC 7 Slow-action contacts, 2NC 9 L313 Fixed position roller Slow-action contacts, 2NO 10 L353 Single adjustment roller Snap-action contacts, 2NC 11 Slow-action contacts, break before make 2NC + 1NO L354 Dual adjustment roller 20 Slow-action contacts, break before make 3NC 21 Slow-action contacts, break before make 1NC + 2NO 22 Snap-action contacts, 2NO + 2NC 2 – Standard actuators – options overleaf Specify lever type for lift-style switch: Please note: Positive break applies to the NC contacts of types 5, 6, 7, 9, 11, 20, 21 and 22 only. Specifications Rated thermal current Ith Rated working voltage Maximum operating frequency Mechanical life Contact form Initial contact resistance Contact gap Contact material Dielectric strength Protection rating Ambient operating temperature Ambient humidity Maximum wire size Housing material Conduit entr y 10A 500VAC/600VDC 6000/hour >20 million operations 1NO + 1NC <25 mOhms >2.5mm (2 x 1.25mm conforming to VDE 0660 part 206) silver 2000VAC, 50/60Hz for 1 minute between open contacts 2000VAC, 50/60Hz for 1 minute between current-carrying parts and ground IP66 –25 to +80 deg. C 95% R.H. 2 x 1.5mm2 flexible, 2 x 2.5mm2 solid FD/FL: die-cast metal alloy, FP: self-extinguishing, glass-reinforced, thermoplastic resin PG 13.5 Contact ratings BS/EN 60947-5-1 AC15 – Control of AC electromagnetic loads>72VA sealed – replaces AC11 Terminal connections 230VAC 400VAC 500VAC 6A 4A 1A DC13 – Control of DC electromagnetic 24VDC loads where the time taken to reach 125VDC 95% of the rated current is equal to 250VDC 6 times the power of the load (where P<50W) – replaces DC11 6A 1.1A 0.4A Terminal screws: M3.5 with rising cable clamps. Standard contacts (type 5) NO: 13-14, NC: 21-22 Note: The positive break of the type 5 contact block applies to the NC contacts only. Connections to safety circuits should NOT be made using the NO contacts. To ensure positive breaking of the contacts, exceed the pre-travel by 1.5mm or 25˚ according to the model. Maximum screw tightening torque 0.8Nm (8Kg cm) FD/FP/FL Programmable head – lever operation models All limit switches with lever operation in the FD/FP/FL ranges can be user-set to switch by clockwise rotation only, anticlockwise only or both. To change the operation, which is factory set to switch in both directions, the four screws securing the turret head should be loosened, the head removed and the internal piston rotated through 90˚. The head should then be replaced. The models to which this applies are: 531; 532; 533; 535; 536; 538; 551; 552; 553. Figure 1 shows the piston position for switching in both directions, figure 2 for clockwise only and figure 3 for anticlockwise only. Standard actuator options – FD and FP series Actuator type 01 Piston plunger Operating force min. Pre-travel Over-travel Movement differential Operating point Operating speed max. OF PT OT MD OP OS 820g 2mm 4mm 1mm 22mm 0.5m/s Actuator type 05 One-way roller-side actuated OF 615g PT 2.9mm OT 5.6mm MD 1.6mm OP – OS 0.5m/s using a 30˚ cam Note: ø20mm plastic roller as standard, ø20mm metal roller actuator part no.: 051 Actuator type 02 One-way roller - top actuated OF 615g PT 2.9mm OT 5.6mm MD 1.6mm OP 49.1mm OS 0.5m/s using a 30˚ cam Note: ø20mm plastic roller as standard, ø20mm metal roller actuator part no.: 021 Actuator type 10 Sealed piston plunger OF 1125g PT 2mm OT 4mm MD 1mm OP 35mm OS 0.5m/s Actuator type 11 Long piston plunger OF 820g PT 2mm OT 4mm MD 1mm OP 35mm OS 0.5m/s FD/FP/FL Standard actuator options – FD and FP series Actuator type 15 Sealed roller piston plunger OF 1125g PT 2mm OT 4mm MD 1mm OP 48mm OS 0.5m/s using a 30˚ cam Note: ø13mm metal roller only Actuator type 16 Roller piston plunger OF 820g PT 2mm OT 4mm MD 1mm OP 48mm OS 0.5m/s using a 30˚ cam Note: ø13mm metal roller only Actuator type 20 Sealed coil spring with flexible rod OF 125g at 2/3 the length of the actuator PT 14˚ OT – MD 7˚ OP – OS 1m/s Notes: Not suitable for safety circuits Not suitable for use with contact blocks 20, 21 or 22 Actuator type 21 Sealed coil spring with cat’s whisker OF 92g at 2/3 the length of the actuator PT 14˚ OT – MD 7˚ OP – OS 1m/s Notes: Not suitable for safety circuits Not suitable for use with contact blocks 20, 21 or 22 Actuator type 25 Sealed coil spring OF 195g at 2/3 the length of the actuator PT 14˚ OT – MD 7˚ OP – OS 1m/s Notes: Not suitable for safety circuits Not suitable for use with contact blocks 20, 21 or 22 Actuator type 31 Roller-lever with small offset OF 1530gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s using a 30˚ cam Notes: 1. ø20mm plastic roller as standard, ø20mm metal roller actuator part no.:311; ø35mm plastic roller actuator part no.:312; ø50mm rubber roller actuator part no.:313. 2. Lever position adjustable over 360˚ in 10˚ increments Actuator type 18 Rolling ball piston plunger OF 820g PT 2mm OT 4mm MD 1mm OP 39mm OS 0.5m/s Actuator type 32 Adjustable round steel rod lever Actuator type 33 Adjustable square steel rod lever (rod 3x3x125) OF 1530gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s Note: Lever position adjustable over 360˚ in 10˚ increments FD/FP/FL Standard actuator options – FD and FP series Actuator type 35 Adjustable roller lever OF 1530gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s using a 30˚ cam Notes: 1. ø20mm plastic roller as standard, ø20mm metal roller actuator part no.:351; ø35mm plastic roller actuator part no.:352; ø50mm rubber roller actuator part no.:353. 2. Lever position adjustable over 360˚ in 10˚ increments Actuator type 40 Dual roller lever with two stable free positions Specify lever type: Double track (shown above) L42 Single track (not shown) L41 Steel rod lever L43 Actuator type 36 Adjustable glass-fibre rod lever OF 1530gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s Notes: 1. Not suitable for safety circuits. 2. Lever position adjustable over 360˚ in 10˚ increments Actuator type 38+L34 Coiled spring lever with flexible rod OF 1530gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s Notes: 1. Not suitable for safety circuits. 2. Lever position adjustable over 360˚ in 10˚ increments Actuator type 51 Roller-lever with large offset OF 920gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s using a 30˚ cam Notes: 1. ø20mm plastic roller as standard, ø20mm metal roller actuator part no.:511. 2. Lever position adjustable over 360˚ in 10˚ increments Only available in FD series (metal case), not FP series Actuator type 52 Roller lever without offset OF 920gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s Notes: 1. ø20mm plastic roller as standard, ø20mm metal roller actuator part no.:521; ø35mm plastic roller actuator part no.:522; ø50mm rubber roller actuator part no.:523. 2. Lever position adjustable over 360˚ in 10˚ increments Actuator type 53 Porcelain roller lever OF 615gcm PT 30˚ OT 45˚ MD 14˚ OP – OS – Note: Lever position adjustable over 360˚ in 10˚ increments Actuator type 76 Rope OF 2450g PT 1.8mm OT 6.4mm MD 1mm OP 66.8mm OS – Note: Not suitable for safety circuits. For rope operated safety switches, see Safety Limit Switches data sheet on page 297 FD/FP/FL Standard actuator options – FL series Actuator type 01 Piston plunger OF 820g PT 2mm OT 4mm MD 1mm OP 23mm OS 0.5m/s Actuator type 02 One-way roller - top actuated OF 615g PT 2.9mm OT 5.6mm MD 1.6mm OP 49.1mm OS 0.5m/s using a 30˚ cam Note: ø20mm plastic roller as standard, ø20mm metal roller actuator part no.:021 Actuator type 05 One-way roller - side actuated OF 615g PT 2.9mm OT 5.6mm MD 1.6mm OP – OS 0.5m/s using a 30˚ cam Note: ø20mm plastic roller as standard, ø20mm metal roller actuator part no.:051 Actuator type 10 Sealed piston plunger OF 1125g PT 2mm OT 4mm MD 1mm OP 35mm OS 0.5m/s Actuator type 15 Sealed roller piston plunger OF 1125g PT 2mm OT 4mm MD 1mm OP 48mm OS 0.5m/s using a 30˚ cam Note: ø13mm metal roller only Actuator type 16 Roller piston plunger OF 820g PT 2mm OT 4mm MD 1mm OP 48mm OS 0.5m/s using a 30˚ cam Note: ø13mm metal roller only Actuator type 04 Piston plunger with adjustable glassfibre rod lever OF PT OT Variable – dependent on MD glass-fibre rod position OP OS } Actuator type 18 Rolling ball piston plunger OF 820g PT 2mm OT 4mm MD 1mm OP 39mm OS 0.5m/s FD/FP/FL Standard actuator options – FL series Actuator type 20 Sealed coil spring with flexible rod OF 125g at 2/3 the length of the actuator PT 14˚ OT – MD 7˚ OP – OS 1m/s Notes: Not suitable for safety circuits Not suitable for use with contact blocks 20, 21 or 22 Actuator type 21 Sealed coil spring with cat’s whisker OF 92g at 2/3 the length of the actuator PT 14˚ OT – MD 7˚ OP – OS 1m/s Notes: Not suitable for safety circuits Not suitable for use with contact blocks 20, 21 or 22 Actuator type 31 Roller lever with small offset OF 1530gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s using a 30˚ cam Notes: 1. ø20mm plastic roller as standard, ø20mm metal roller actuator part no.:311; ø35mm plastic roller actuator part no.:312; ø50mm rubber roller actuator part no.:313. 2. Lever position adjustable over 360˚ in 10˚ increments Actuator type 32 Adjustable round steel rod lever OF 1530gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s Note: Lever position adjustable over 360˚ in 10˚ increments Actuator type 33 Adjustable square steel rod lever OF 1530gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s Note: Lever position adjustable over 360˚ in 10˚ increments Actuator type 35 Adjustable roller lever OF 1530gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s using a 30˚ cam Notes: 1. ø20mm plastic roller as standard, ø20mm metal roller actuator part no.:351; ø35mm plastic roller actuator part no.:352; ø50mm rubber roller actuator part no.:353. 2. Lever position adjustable over 360˚ in 10˚ increments Actuator type 25 Sealed coil spring OF 195g at 2/3 the length of the actuator PT 14˚ OT – MD 7˚ OP – OS 1m/s Notes: Not suitable for safety circuits Not suitable for use with contact blocks 20, 21 or 22 Actuator type 36 Adjustable glass-fibre rod lever OF 1530gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s Notes: 1. Not suitable for safety circuits. 2. Lever position adjustable over 360˚ in 10˚ increments FD/FP/FL Standard actuator options – FL series Specify lever type: Double track (shown above) L42 Single track (not shown) L41 Steel rod lever L43 Actuator type 51 Roller lever with large offset OF 920gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s using a 30˚ cam Notes: 1. ø20mm plastic roller as standard, ø20mm metal roller actuator part no.: 511. 2. Lever position adjustable over 360˚ in 10˚ increments Actuator type 53 Porcelain roller lever OF 615gcm PT 30˚ OT 45˚ MD 14˚ OP – OS – Note: Lever position adjustable over 360˚ in 10˚ increments Actuator type 76 Rope OF 2450g PT 1.8mm OT 6.4mm MD 1mm OP 66.8mm OS – Note: Not suitable for safety circuits. For rope operated safety switches, see Safety Limit Switches data sheet on page 217 Actuator type 40 Dual roller lever with two stable free positions Actuator type 52 Roller lever without offset OF 920gcm PT 30˚ OT 45˚ MD 14˚ OP – OS 1.5m/s using a 30˚ cam Notes: 1. ø20mm plastic roller as standard, ø20mm metal roller actuator part no.: 521; ø35mm plastic roller actuator part no.: 522; ø50mm rubber roller actuator part no.:523. 2. Lever position adjustable over 360˚ in 10˚ increments Glossary The following is a glossary of terms in specifying actuator characteristics: Operating force (OF) The force applied to the actuator required to operate the switch contacts. Releasing force (RF) The value to which the force on the actuator must be reduced to allow the contacts to return to the normal position. Total force (TF) The force applied to the actuator required to reach the stopper from the free position. Free position (FP) The initial position of the actuator when there is no external force applied. Operating position (OP) The position of the actuator at which the contacts snap to the operated contact position measured with respect to the centres of the mounting holes. Releasing position (RP) The position of the actuator at which the contacts snap from the operated contact position to their normal position. Total travel position (TTP) The position of the actuator when it reaches the limit of travel – must not be exceeded. Pretravel (PT) The distance or angle through which the actuator moves from the free position to the operating position. OF FP Total travel (TT) The sum of the pretravel and overtravel expressed by distance or angle. RF RP TT OT OP TTP Overtravel (OT) The distance or angle of the actuator movement beyond the operating position. Movement differential (MD) The distance or angle from the operating position to the releasing position. MD PT Operate PP OP TTP Release RF TT PT MD PT MD AP OP TTP TF FD/FP/FL Lift-style switches EXAMPLES FD538 or FD5385 or FD938 + L313 FP538 or FP938 + L313 Turret type 38 Lever type L313 (fixed position roller) ■ ■ ■ ■ ■ FD538 or FD5385 or FD938 + L353 FP538 or FP938 + L353 Turret type 38 Lever type L353 (single adjustment roller) Three lever options. FL model also available with a choice of lever. Age-resistant and oil-resistant rubber rollers. Lever position adjustable over 360˚ in 10˚ increments. Head rotatable in 90˚ increments. FD538 or FD5385 or FD938 + L354 FP538 or FP938 + L354 Turret type 38 Lever type L354 (dual adjustment roller) ■ User-selectable to switch by clockwise movement only, anticlockwise only, or both. ■ Glass-reinforced thermoplastic resin model (FP) double insulated for electrical safety. ■ Die-cast metal alloy models (FD and FL) include earth terminal. Types L353 and L354 have a location slot at the end to lock the levers at full extension if required. Replacement contact blocks 1NO+1NC 13 21 14 22 B5 Positive break Snap action standard contact block Zb Positive break Slow action break before make Zb Positive break Slow action make before break Zb 1NO+1NC 13 21 14 22 B6 1NO+1NC B7 13 21 14 22 2NC B9 B14 11 21 12 22 Positive break Slow action, contacts 11-12, 21-22 open at the same time Positive break Slow action, contacts 11-12 open first, further actuator travel causes contacts 21-22 to open Zb 13 23 B15 14 24 Slow action, contacts 13-14, 23-24 close at the same time Slow action, contacts 13-14 close first, further actuator travel causes contacts 23-24 to close 2NO+2NC B2 All FD/FP/FL series limit switches can be converted to a plug-in style by the addition of an adaptor. Part number 8R4D26E03C3003 2NO B10 Plug and socket limit switches 13 21 43 31 14 22 44 32 Snap action, double pole 300mm flying leads The adaptor is screwed into the limit switch and the four flying leads connected to the four terminals of the contact block. Suitable 4-wire plug leads are available – see pages 332 to 335. Ratings 250VAC/300VDC 3A IP67 Cable glands Cable glands are available to enable standard multi-core cables to be connected without the use of conduit. Three sizes are possible: Part number PG13.5 Cable size ø9-12mm Part number PG13.5/6 Cable size ø6-9mm Part number G13.5 Cable size ø9-12mm (type FD only) Type G13.5 Types PG13.5 and PG13.5/6