Compact limit switches with positive opening mechanism LJK-NSeries Positive opening mechanism Positive opening mechanism meets standards worldwide. A wide variety of actuators is available. The LJK-N conforms to IEC standards, and is certified by UL and CSA. For equipment and facilities to be exported anywhere in the world, use the LJK-N with confidence. Positive opening mechanism forces contacts open.* Can prevent problems caused by contact fusing. Can be used also as a safety limit switch. Wide variety, with 33 catalog listings in the lineup Actuators: types Contact configuration : : N.C. x + N.O. x 1 (BBM: break before make, N.C. x *Except for the steel wire and spring rod types. CATALOG LISTING Type of actuator Internal switch mechanism Contact configuration Resin roller lever Resin adjustable roller lever 0mm dia. resin roller lever 0mm dia. resin adjustable roller lever Plunger Resin roller plunger Resin cross roller plunger Resin one-way roller (horizontal Resin one-way roller (vertical Steel wire Spring rod N.C. x N.C. x N.C. x N.C. x N.C. x N.C. x N.C. x N.C. x N.C. x N.C. x N.C. x LJK-N18F1 LJK-N18F1 LJK-N718F1 LJK-N4F1 LJK-N4F1 LJK-N74F1 LJK-N39F1 LJK-N39F1 LJK-N739F1 LJK-N49F1 LJK-N49F1 LJK-N749F1 LJK-N10F1 LJK-N10F1 LJK-N710F1 LJK-N0F1 LJK-N0F1 LJK-N70F1 LJK-N03F1 LJK-N03F1 LJK-N703F1 LJK-NF1 LJK-NF1 LJK-N7F1 LJK-N7F1 LJK-N7F1 LJK-N77F1 LJK-N06F1 LJK-N06F1 LJK-N706F1 LJK-N08F1 LJK-N08F1 LJK-N708F1 1
INTERNAL SWITCH Snap-action type Slow-action BBM type The slow action internal switch has N.C./N.O. electrically independent contacts (form Zb. The positive opening mechanism forces the contacts open (N.C. contacts only even if they are fused. As seen above, the cam forces the N.C. contact up from the bottom, even if there is fusing of the contacts. Note: Steel wire and spring rod types do not have positive opening mechanism. SPECIFICATIONS Standards Compliance Certification Protective structure Electrical shock protection Structure Pollution degree Internal switch Electrical rating Insulation resistance Initial contact resistance Electrical Rated thermal current (Ith performance Short-circuit protection Rated insulation voltage (Ui Rated conditional short-circuit current Rated impulse withstand voltage (Uimp Impact resistance Mechanical performance Vibration resistance Max. operating speed and min. operating speed Mechanical life Life Electrical life Operating temperature Environment Operating humidity Storage temperature Conduit Recommended tightening torque Product-related: IEC 60947--1, and EN 60947--1 Machine-related: IEC 6004-1 and EN 6004-1 UL 08, CSA C. No. IP6 (IEC 609, JIS C 090 Class II (IEC 610 3 LJK-N F1: snap action, LJK-N F1 and LJK-N7 F1: slow action (See Table 1. 100MΩ or more between terminals with the same polarity and between each terminal and non-live metal part (by DC00 megger mω or less (6 to 8Vdc, thermal current 1A, measured by voltage drop method 10A 10A breaking fuse, gg (gl type 00V (IEC 60947--1, 0V (UL 08, CSA C. No. 1,000A 6,000V Durability: 00m/s Note: 0mm dia. resin adjustable roller lever types 0m/s spring rod types 00m/s IEC 60068--7 0m/s (10 to 00Hz, IEC 60068--6 (See Table. 10 million operations : 0000 operations, : 400000 operations to +7C (without freezing Max. 98% RH 40 to +7C G 1/ Body: 0. to 0.7N m (M4 Head: 0.8 to 1.N m (M3 round head screw Cover: 0.8 to 1.N m (M3 round head screw Terminal: 0.8 to 1.N m (M3. round head screw Lever: 1.3 to 1.7N m (M4 round head screw Table 1. Electrical rating AC-: A0 (Ue=40V, Ie=3A DC-: R0 (Ue=0V, Ie=0A Table. Max. operating speed and min. operating speed Actuator Contact configuration Utilization categories AC-: solenoid load DC-: solenoid load Ue: rated operating voltage Ie: rated operating current Actuator Contact configuration LJK-N F1 LJK-N F1 LJK-N7 F1 Roller lever type Plunger type One-way roller / non-directional operation types LJK-N 18F1 LJK-N 10F1 LJK-N F1 LJK-N 39F1 LJK-N 0F1 LJK-N 7F1 LJK-N 4F1 LJK-N 03F1 LJK-N 06F1 LJK-N 49F1 LJK-N 08F1 Min. speed Max. speed Min. speed Max. speed Min. speed Max. speed 0.03m/min 1.m/s 18m/min 1.m/s 18m/min 1.m/s 0.01m/min 0.m/s 0.0m/min 6m/min 0.m/s 1m/min 6m/min 0.m/s 1m/min 1m/s 1m/s 1m/s
OPERATING CHARACTERISTICS BY ROTARY OR IN-LINE ACTUATIONS OF ACTUATORS O.F.: max. operating force needed for N.C. operation Roller lever type Free position Plunger type and one-way roller type P.O.F: min. force for positive opening Non-directional operation type TT PO PT PT TT PO PT PO TT PT PT T.T.: total travel. P.T: pretravel for N.C. operation. P.T.: pretravel for N.O. operation. M.D.: minimum movement differential. P.O.: minimum travel to positive opening position. SHAPE / DIMENSIONS / OPERATING CHARACTERISTICS / CIRCUIT DIAGRAMS Resin roller lever: LJK-N18F1, LJK-N18F1, LJK-N718F1 (unit: mm 3 Roller: 19 dia. x. width, 44. 39.8 4 Roller lever can also be mounted on the opposite side. by lever rotational angle PT (pretravel for N.O. operation LJK-N18F1 LJK-N18F1 LJK-N718F1 0.N m ( (16 (7 47 0.N m (8 (38 (7 41 0.N m (7 (7 (108 3.6 4. 6 6 R. ( ( 18 R. ( 81.6 by dog operation (P LJK-N18F1 16 7 8 47 (P LJK-N18F1 38 7 0 G 1/ 37 LJK-N718F1 7 41 (P 1-1 7 (P: Min. travel to positive opening position 3
Resin adjustable roller lever: LJK-N4F1, LJK-N4F1, LJK-N74F1 (unit: mm 3 (108 to 7 Roller: 19 dia. x. width, (3. to 10. (3. to 84. R. ( R6 to 7 4.3 38 9 Roller lever can also be mounted on the opposite side. by lever rotational angle PT (pretravel for N.O. operation by dog operation LJK-N4F1 LJK-N4F1 LJK-N4F1 LJK-N74F1 0.N m ( (16 (7 (P 16 7 47 0.N m (8 (38 (7 41 0.N m (7 (7 R. ( ( 81.6 LJK-N4F1 8 47 (P 38 7 0 G 1/ 39.7 LJK-N74F1 7 41 (P 1-1 7 (P: Min. travel to positive opening position 0mm dia. resin roller lever: LJK-N39F1, LJK-N39F1, LJK-N739F1 3 Roller: 0 dia. x 10 width, 49. 4 0 Roller lever can also be mounted on the opposite side. by lever rotational angle PT (pretravel for N.O. operation LJK-N39F1 LJK-N39F1 LJK-N739F1 0.N m ( (16 (7 47 0.N m (8 (38 (7 41 0.N m (7 (7 (16 78 33 R. ( by dog operation (P LJK-N39F1 16 7 ( R. ( 81.6 LJK-N39F1 8 47 (P 38 7 0 G 1/ 37 LJK-N739F1 7 41 (P 1-1 7 (P: Min. travel to positive opening position 4
0mm dia. resin adjustable roller lever: LJK-N49F1, LJK-N49F1, LJK-N749F1 (unit: mm 3 Roller: 0 dia. x 10 width, Roller lever can also be mounted on the opposite side. 47.9 40.4 (60 to 100 ( R3 to 7 by dog operation R (78 to 8 (P LJK-N49F1 R 8. ( LJK-N49F1 0 LJK-N749F1 47 (P 7 38 41 (P 7 G 1/ 7 16 81.6 ( (. to 17. 6.9 LJK-N49F1 LJK-N49F1 LJK-N749F1 by lever rotational angle 47 41 0.N m 0.N m 0.N m ( (8 (7 (38 PT (pretravel for N.O. operation (16 (7 (7 (7-1 7 39.7 1 (P: Min. travel to positive opening position Plunger: LJK-N10F1, LJK-N10F1, LJK-N710F1 LJK-N10F1 LJK-N10F1 LJK-N710F1 by vertical operation N N N 4.mm 4.mm 4mm N N N (.mm (.8mm (.7mm (4.0mm PT (pretravel for N.O. operation (1.4mm ( ( ( Plunger: 8 dia. Steel by vertical operation 1.. 4.(P. ( LJK-N10F1 1.4 ( 0. R R (7.8 LJK-N10F1 ( 4.0.7 LJK-N710F1 0 G 1/ 4.(P -1 4(P 1 (P: Min. travel to positive opening position
Resin roller plunger: LJK-N0F1, LJK-N0F1, LJK-N70F1. R. LJK-N0F1 LJK-N0F1 LJK-N70F1 by vertical operation N N N 4.mm 4.mm 4mm N N N (.mm (.8mm (.7mm (4.0mm PT (pretravel for N.O. operation (1.4mm ( ( ( 1. Roller: dia. x 3. width, by vertical operation ( 4.(P. ( LJK-N0F1 8 (unit: mm R. ( 0 4.0 LJK-N70F1 4(P.7 G 1/ 4.(P.8 LJK-N0F1 1.4-1 1 (P: Min. travel to positive opening position Resin cross roller plunger: LJK-N03F1, LJK-N03F1, LJK-N703F1 LJK-N03F1 LJK-N03F1 LJK-N703F1 by vertical operation N N N 4.mm 4.mm 4mm N N N (.mm (.8mm (.7mm (4.0mm PT (pretravel for N.O. operation (1.4mm ( ( ( Roller: dia. x 3. width, 1. 4.(P. LJK-N03F1 ( R R LJK-N03F1 1.4.8 8. by vertical operation (. 4.(P 4.0 1 (.7 LJK-N703F1 0 G 1/ -1 4(P 6 (P: Min. travel to positive opening position
Resin one-way roller (horizontal: LJK-NF1, LJK-NF1, LJK-N7F1 (unit: mm 3 LJK-NF1 LJK-NF1 LJK-N7F1 by dog operation.9mm.9mm.6mm (9mm (10mm (9.6mm (mm PT (pretravel for N.O. operation (.mm Roller: dia. x. width,. R18 R ( LJK-NF1.9(P R ( (93.7 by dog operation 9 19 (39. 10 10 ( LJK-NF1 G 1/ LJK-N7F1.9(P mm 9.6.6(P 0.mm -1 1 (P: Min. travel to positive opening position Resin one-way roller (vertical: LJK-N7F1, LJK-N7F1, LJK-N77F1 3 LJK-N7F1 LJK-N7F1 LJK-N77F1 by dog operation.9mm.9mm.6mm (9mm (10mm (9.6mm (mm PT (pretravel for N.O. operation (.mm Roller: dia. x. width, 10 by dog operation 9 R. ( LJK-N7F1 ( (9. 19 (41 R18.mm 10 LJK-N7F1.9(P.9(P mm 1 R. ( 9.6.6(P LJK-N77F1 0 1 G 1/ (1. -1 7 (P: Min. travel to positive opening position
Steel wire: LJK-N06F1, LJK-N06F1, LJK-N706F1 (unit: mm Note: Steel wire switches do not have positive opening mechanism. LJK-N06F1 LJK-N06F1 LJK-N706F1 by wire inclination angle 0.N m 0.N m 0.N m ( (8 (7 (4 PT (pretravel for N.O. operation ( 196. 1. dia.. R ( by dog operation 1 R 69 ( LJK-N06F1 8. LJK-N06F1 ( 4 7 0 G 1/ LJK-N706F1-1 (P: Min. travel to positive opening position Spring rod: LJK-N08F1, LJK-N08F1, LJK-N708F1 Note: Steel wire switches do not have positive opening mechanism. LJK-N08F1 LJK-N08F1 LJK-N708F1 by rod inclination angle 0.N m 0.N m 0.N m ( (8 (7 (4 PT (pretravel for N.O. operation ( 18 6.4 dia. 18. LJK-N08F1 ( R by dog operation ( 69 R. 1 8 LJK-N08F1 4 ( 7 LJK-N708F1 0 1 G 1/ -1 8 (P: Min. travel to positive opening position
HANDLING PRECAUTIONS 1. Mounting the switch Always tighten each part of the safety switch to the tightening torque recommended in the product specifications. If any part is tightened excessively, the screw and/or other parts may be damaged. Mount the dog so that no force is directly applied to the actuator in the free state. Do not use any glue or lubricant containing silicone. Doing so might result in faulty electrical conductivity.. Wiring Do not perform wiring work with the power turned ON. Doing so might cause an electrical shock or cause the device to operate suddenly. 3. Adjustment Do not apply excessive force (force times larger that the O.F. to the actuator when it is beyond the operation limit position. Doing so might break the switch. Adjust the actuator motion so that it exceeds the specified P.O. (travel to positive opening position but does not exceed the operation limit position. 4. Operating environment Do not use in a location subject to splashing with strong acid or alkali. 1 9