Honeywell MICRO SWITCH SZL-VL-S Miniature Limit Switch Installation Guide
- June 7, 2024
- Honeywell
Table of Contents
Honeywell MICRO SWITCH SZL-VL-S Miniature Limit Switch
Installation Instructions
for the MICRO SWITCH SZL-VL-S Miniature Limit Switch
WARNING: PERSONAL INJURY
DO NOT use these products as safety or emergency stop devices or in any other
application where failure of the product could result in personal injury.
Failure to comply with these instructions could result in death or serious
injury.
WARNING: IMPROPER INSTALLATION
- Consult with local safety agencies and their requirements when designing a machine control link, interface, and all control elements that affect safety.
- Strictly adhere to all installation instructions.
Failure to comply with these instructions could result in death or serious injury.
Multiple language versions of installation instructions and other documents are available on Honeywell’s website. To access:
- Go to https://sps.honeywell.com/us/en/support/sensing-and-iot/micro-switch-limit-switch-installation-instructions
- Select the product’s instructions from the installation instruction section.
Figure 1. SZL-VL Wiring View
INSTALLATION INFORMATION
-
Refer to
- Page 4 for switch mounting torque
- Page 5 for specifications
-
For mounting, note mounting dimension drawing for hole locations (Figure 5).
-
Mount switch
3a. Torque switch to mounting surface: 2,5 Nm to 3 Nm [22.1 in-lb to 26.6 in- lb] using M4 screw
3b. Care should be taken to ensure that all mounted hardware cannot become detached during the operational lifetime in the intended application -
Loosen the screws on the switch’s cover and remove it.
-
For switches where the cable gland is not provided, use a gland rated Type 1 or higher to maintain the integrity of the enclosure-type rating.
-
Loosen gland cover, then torque the gland to the switch’s cover using 1 Nm to 2 Nm [8.85 in-lb to 17.7 in-lb] of force. Ensure the o-ring was assembled between the gland and the switch cover.
-
Use copper conductors rated at 75°C or higher. Thread the cable through the gland cover and gland, then press the wire into the contact block’s terminals.
-
Refer to circuit diagram on switch’s cover. Insert the terminals into the switch and then fully fix terminal screws: 0,5 Nm to 0,6 Nm [4.42 in-lb to 5.31 in-lb].
-
Perform functional tests. After wiring, use a voltmeter to ensure when the switch is operated (turned off and on) that a change of state occurs.
9a. Confirm the normal closed contacts open when actuator is pushed or lever is rotated.
9b. Confirm the normal open contacts closed when actuator is pushed or lever is rotated. -
Reassemble up cover, and torque it: 0,5 Nm to 0,6 Nm [4.42 in-lb to 5.31 in-lb] using M3 screw.
-
Reassemble gland cover (0,8 Nm to 1,5 Nm torque)
MICRO SWITCH SZL-VL-S Miniature Limit Switch
Figure 2. SZL-VL Exploded View
SIDE ROTARY HEAD DIRECTION CHANGE
Figure 3. Rotary Head Direction Change
- Disassemble the head’s cross-type (combo-head) screw. Do not loosen or remove the other two Torx® screws.
- Remove the switch cover by loosening the three (3) cover screws.
- Lift slightly on the switch head.
- Rotate the switch head to the desired direction ensuring the clip is still engaged with the head-neck slot.
- If clip dislodges, return the clip to its location above the contact blow and below the top of the switch housing by fully re-inserting the clip.
- Re-insert the cross-type (combo head) screw to re-assemble the switch’s head, 0,4 Nm to 0,5 Nm [3.54 in-lb to 4.42 in-lb].
PLUNGER HEAD DIRECTION CHANGE
Figure 4. Plunger Head Direction Change
- Remove the switch cover by loosening the three (3) cover screws.
- Use flat screw driver to lift up the clip.
- Rotate the switch head to the desired direction.
- Properly align the two pins on the switch’s head into the holes on the switch’s body.
- Return the clip to its location above the contact blow and below the top of the switch housing by fully re-inserting the clip.
MICRO SWITCH SZL-VL-S Miniature Limit Switch
Figure 5. Installation Screw Identification and Torque
Table 1. Installation Screw and Torque
Scre w
| De scription (see Figure 5)|
Scre w t ype
|
Ins t all ation torque
---|---|---|---
1| Installation screw for cover| M3 x 21
machine screw
| 0,5 Nm to 0,6 Nm [4.42 in-lb to 5.31 in-lb]
2| Installation screw for cover| M3 x 5 machine screw| 0,5 Nm to 0,6 Nm
[4.42 in-lb to 5.31 in-lb]
3| Installation screw for head| M2.5 screw| 0,4 Nm to 0,5 Nm [3.54 in-lb
to 4.42 in-lb]
4| Installation screw for fixed lever| M4 machine screw| 0,65 Nm to 0,85
Nm [5.8 in-lb to 7.5 in-lb]
5| Installation screw for adjustable lever| M4 machine screw| 2,5 Nm to
3 Nm [22.1 in-lb to 26.6 in-lb]
6| Terminal screw| M3 x 6 screw with assembled lock washer| 0,5 Nm to
0,6 Nm [4.42 in-lb to 5.31 in-lb]
7| Grounding screw| M3 x 5.5
machine screw
| 0,5 Nm to 0,6 Nm [4.42 in-lb to 5.31 in-lb]
8| Installation screw for product| M4 machine screw| 2,5 Nm to 3 Nm
[22.1 in-lb to 26.6 in-lb]
Table 2. Performance Specifications
| Characteristic | Parameter |
|---|---|
| Description | Miniature industrial limit switch |
| Approvals | CCC, CE, cULus |
| Housing material | Die-cast metal housing with glass-filled, flame- |
retardant thermoplastic cover UL 94 flame spread testing: V-0 rated
Electrical connection| Conduit entry or cable gland
Contact design| Snap-action (all versions)
Positive-opening contacts (side-rotary version only)
Contact material| Silver alloy
Electrical ratings| AC-15 A300 (380 Vac/0.5 A) DC-13 Q300 (220 Vdc/0.05
A)
Thermal current (I th )| 10 A/250 Vac (EN 60947-5-1)
Initial contact resistance| < 25 mOhm
Insulation resistance| >100 MOhm at 500 Vdc
Impulse voltage| 2500 Vdc
Dielectric voltage| 1890 Vac for metal housing, 1890 Vac between all
terminals to enclosure after durability test
Leakage current| < 10 mA
Pollution degree| 3
Environmental sealing| IP67
Operating temperature| -20°C to 70°C [-4°F to 158°F] (with no icing)
Humidity| 95 %RH
Shock| 30 G, conforming to IEC 60068-2-27
Vibration| 10 G, 10 Hz to 55 Hz displacement amplitude 0,75 mm,
conforming to IEC 60068-2-6 (wobble excluded)
MCTF (Mechanical life)| 10M cycles @ 120 cpm max.
MCTF (Electrical life)| 0.5M cycles @ 30 cpm max. under the rated
resistance load
Operating speed| 0,05 mm/s to 2 m/s (based on pin plunger limit switch)
Operating frequency| Mechanical: 120 ops/min; Electrical: 30 ops/min
Weight| 120 g to 150 g
Table 3. Specifications
Cat alog lis ting 1| A ctuator| R oller
/pin plunger| L ev e r| F ree position|
P retra v el max. mm [in]| Dif f erential
tra v el max. mm [in]| O v er tra v
el min. mm [in]| Min. tra v el to
achie v e positiv e opening| Operating f
orce/ torque (max.)| B ar char t
---|---|---|---|---|---|---|---|---|---|---
S ZL -VL -S-A-N-M| Side rotary, fixed lever| Nylon roller,
Ø18 x 6,5
[Ø0.71 x 0.25]|
Steel, R30
|
0°
|
25°
|
15°
|
70°
|
40°
| 18 Ncm [1.59
in-lb]
|
S ZL -VL -S-I-N-M| Side rotary, fixed lever| Steel roller, Ø18 x 6,5 [Ø0.71 x 0.25]| Steel, R30| 0°| 25°| 15°| 70°| 40°| 18 Ncm [1.59
in-lb]
S ZL -VL -S-B-N-M| Side rotary, adjustable lever| Nylon roller, Ø18 x 6,5 [Ø0.71 x 0.25]|
Steel, R30 to R70
|
0°
|
25°
|
15°
|
70°
|
40°
| 18 Ncm [1.59
in-lb]
S ZL -VL-S-J-N-M| Side rotary, adjustable lever| Steel roller, Ø18 x 6,5 [Ø0.71 x 0.25]|
Steel, R30 to R70
|
0°
|
25°
|
15°
|
70°
|
40°
| 18 Ncm [1.59
in-lb]
S ZL -VL -S-C-N-M|
Side rotary, adjustable rod
|
–
| Metal rod, Ø2,5 mm [0.1 in],
125 mm
[4.92 in] long|
0°
|
25°
|
15°
|
70°
|
40°
| 18 Ncm [1.59
in-lb]
S ZL -VL -S-D-N-M|
Top pin plunger
| Metal pin, Ø6,6 [0.26]|
–
| 27 ±0,8 [1.04
±0.03]*
| 2 [0.08]| 1,5 [0.06]| 3,5 [0.14]|
n/a
| 9 N [2.02 lb]|
S ZL -VL -S-H-N-M| Top roller plunger| Steel roller, Ø12,5 x 3,8 [Ø0.5 x 0.15]|
–
| 38,5 ±0,8 [1.5
±0.03]*
| 2 [0.08]| 1,5 [0.06]| 3,5 [0.14]|
n/a
| 9 N [2.02 lb]
S ZL -VL -S-E-N-M| Top cross roller plunger| Steel roller,
Ø12,5 x 3,8 [Ø0.5 x 0.15]|
–
| 38,5 ±0,8 [1.5
±0.03]*
| 2 [0.08]| 1,5 [0.06]| 3,5 [0.14]|
n/a
| 9 N [2.02 lb]
S ZL -VL -S-F-N-M| Wobble, coil spring and nylon rod|
–
| Ø5,8 mm [0.23 in] coil spring with plastic rod|
0°
|
30°
|
–
|
20°
|
n/a
|
2 N [0.45lb]
|
S ZL -VL -S-G-N-M| Wobble, coil spring and metal wire|
–
| Ø5,8 mm [0.23
in] coil spring with Ø1,2 mm [0.05
in] metal wire
|
0°
|
30°
|
–
|
20°
|
n/a
|
2 N [0.45lb]
S ZL -VL -S-K -N-M| Wobble, coil spring|
–
| Ø5,8 mm [0.23 in] coil spring|
0°
|
30°
|
–
|
20°
|
n/a
| 2 N [0.45lb]
Specifications are exactly the same for the -N and -M with cable gland option
(from the center of the mounting hole)
Actuator should use bevel block for fixed lever, adjustable lever and top roller plunger
sps.honeywell.com/ast
When wiring, leave enough space for cable.
Warranty/Remedy
Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship during the applicable warranty period. Honeywell’s standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order acknowledgement or consult your local sales office for specific warranty details. If warranted goods are returned to Honeywell during the period of coverage, Honeywell will repair or replace, at its option, without charge those items that Honeywell, in its sole discretion, finds defective. The foregoing is buyer’s sole remedy and is in lieu of all other warranties, expressed or implied, including those of merchantability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect damages.
While Honeywell may provide application assistance personally, through our
literature and the Honeywell web site, it is buyer’s sole responsibility to
determine the suitability of the product in the application.
Specifications may change without notice. The information we supply is
believed to be accurate and reliable as of this writing. However, Honeywell
assumes no responsibility for its use.
FOR MORE INFORMATION
Honeywell Advanced Sensing Technologies services its customers through a
worldwide network of sales offices and distributors. For application
assistance, current specifications, pricing or the nearest Authorized
Distributor, visit our website or call:
USA/Canada +1 302 613 4491
USA/Canada +1 302 613 4491
Latin America +1 305 805 8188
Europe +44 1344 238258
Japan +81 (0) 3-6730-7152
Singapore +65 6355 2828
Greater China +86 4006396841
Honeywell
Advanced Sensing Technologies
830 East Arapaho Road
Richardson, TX 75081
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References
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