Omron ZC-W55, ZC-W155, ZC-W255, ZC-W2155, ZC-W355 Datasheet

Enclosed Switch ZC-@55 F-109

Limit

Switches

Enclosed Switch

ZC-@55

Small, High-precision Enclosed Switch

• Employs a modified version of Z Basic Switch as built-in switch.

• Same mounting pitch as Z Basic Switch.

• Pre-wired molded terminal models are available.

• Requires less operating force than conventional limit switches.

• Long life expectancy and economical.

• UL, CSA, and EN models are available.

Model Number Structure

■ Model Number Legend

1. Actuator

D: Plunger
Q: Panel mount plunger
Q22: Panel mount roller plunger
Q21: Panel mount crossroller plunger
N22: Sealed roller plunger
N21: Sealed crossroller plunger

W: Short hinge lever
W1: Hinge lever
W2: Short hinge roller lever
W21: Hinge roller lever
W3: One-way action short hinge roller lever
W31: One-way action hinge roller lever

Ordering Information

■ List of Models

Note: 1. Use molded terminal models (refer to page 117) when using the Switch under one of the following conditions:

a) dusty, b) high amount of dripping oil, or c) high humidity

2. Micro-load models are available.

e.g. Standard model

Micro-load model

ZC-Q55 ZC-Q55-01

1

ZC-@55

Actuator Model Actuator Model

ZC-D55 ZC-W55

ZC-Q55 ZC-W155

ZC-Q2255 ZC-W255

ZC-Q2155 ZC-W2155

ZC-N2255 ZC-W355

ZC-N2155 ZC-W3155

Plunger

Short hinge
lever

Panel mount
plunger

Hinge lever

Panel mount
roller plunger

Short hinge
roller lever

Panel mount
crossroller plunger

Hinge roller
lever

Sealed roller
plunger

One-way action
short hinge roller
lever

Sealed crossroller
plunger

One-way action
hinge roller lever

F-110 Enclosed Switch ZC-@55

Terminal Protective Cover, Seal Rubber, and Rubber Packing

(The Switch is equipped with these 3 items as a standard.)

Specifications

■ Approved Standards

(Except Molded Terminal Models and Operation Indicator-equipped Model)

■ Approved Standard Ratings

UL/CSA
A300

TÜV Rheinland

250 V, 10 A (AC12)

■ Ratings

Note: 1. The above figures are for steady-state currents.

2. Inductive loads have a power factor of 0.4 min. (AC) and a time constant of 7 ms max. (DC).

3. Lamp load has an inrush current of 10 times the steady-state current.

4. Motor load has an inrush current of 6 times the steady-state current.

5. The above ratings were tested under the following conditions according to JIS C4508.

Ambient temperature: 20±2°C
Ambient humidity: 65±5%
Operating frequency: 20 operations/min

Agency Standard File No.

UL UL508 E76675
CSA C22.2, No. 14 LR45258
TÜV Rheinland EN60947-1, EN60947-5-1 J9650089

Rubber packing

Terminal cover

Seal rubber

• ZC Terminal Cover

(Product code: ZC55-0002H)

• ZC Seal Rubber

(Product code: SC-1404C)

• ZC Rubber Packing

(Product code: ZC55-9999G)

Voltage Carry current Current Volt-amperes

Make Break Make Break

120 VAC 10 A 60 A 6 A 7,200 VA 720 VA
240 VAC 30 A 3 A

Micro load 0.1 A, 125 VAC

0.1 A, 30 VDC

Rated voltage Non-inductive load Inductive load

Resistive load Lamp load Inductive load Motor load

NC NO NC NO NC NO NC NO
125 VAC 10 A 3 A 1.5 A 10 A 5 A 2.5 A
250 VAC 10 A 2.5 A 1.25 A 10 A 3 A 1.5 A
8 VDC 10 A 3 A 1.5 A 6 A 5 A 2.5 A
14 VDC 10 A 3 A 1.5 A 6 A 5 A 2.5 A
30 VDC 6 A 3 A 1.5 A 5 A 5 A 2.5 A
125 VDC 0.5 A 0.4 A 0.4 A 0.05 A 0.05 A 0.05 A
250 VDC 0.25 A 0.2 A 0.2 A 0.03 A 0.03 A 0.03 A

Inrush current NC 30 A max.

NO 15 A max.

Enclosed Switch ZC-@55 F-111

Limit

Switches

■ Characteristics

Note: Less than 1 ms under a free state at the operating limits.

■ Operating Characteristics

■ Contact Form

Degree of protections IP67
Durability Mechanical: 10,000,000 operations min.

Electrical: 500,000 operations min.

Operating speed 0.05 mm to 0.5 m/s (at pin plunger)
Operating frequency Mechanical: 120 operations/min

Electrical: 20 operations/min

Insulation resistance 100 MΩ min. (at 500 VDC)
Contact resistance 15 mΩ max. (initial value)
Dielectric strength 1,000 VAC, 50/60 Hz for 1 min between non-continuous terminals

2,000 VAC, 50/60 Hz for 1 min between current-carrying metal part and ground, and between each terminal
and non-current-carrying metal parts

Rated insulation voltage (U

i

) 1,000 VAC

Pollution degree
(operating environment)

3 (IEC947-5-1)

Short-circuit protective device 10 A-fuse type gG (IEC 269)
Protection against electric

shock

Class II

PT1 (tracking characteristics) 175
Switch category D (IEC335)
Rated operating current (Ie) 10 A
Rated operating voltage (Ue) 250 VAC
Vibration resistance Malfunction: 10 to 55 Hz, 1.5-mm double amplitude (see note)
Shock resistance

Destruction: 1,000 m/s

2

max.

Malfunction: 300 m/s

2

max. (at pin plunger) (see note)

Ambient temperature Operating: –10°C to 80°C (with no icing)
Ambient humidity Operating: 35% to 95%
Weight Approx. 92 g (in case of ZC-Q22(21)55)

Model ZC-D55 ZC-Q55 ZC-Q2255 ZC-Q2155 ZC-N2255 ZC-N2155
OF max. 11.8 N 11.8 N 6.86 N
RF min. 4.90 N 4.90 N 1.67 N
PT max. 1.5 mm 1.5 mm 1.5 mm
OT min. 2.4 mm 3 mm 2.5 mm
MD max. 0.2 mm 0.2 mm 0.2 mm
OP 32.4±0.8 mm 38.2±0.8 mm 47.4±0.8 mm

Model ZC-W55 ZC-W155 ZC-W255 ZC-W2155 ZC-W355 ZC-W3155
OF max. 3.92 N 2.75 N 3.92 N 2.75 N 3.92 N 2.75 N
RF min. 0.78 N 0.59 N 0.78 N 0.59 N 0.78 N 0.59 N
OT min. 6 mm 8.4 mm 6 mm 8.4 mm 6 mm 8.4 mm
MD max. 1 mm 1.4 mm 1 mm 1.4 mm 1 mm 1.4 mm
OP 28.5±1.2 mm 28.5±1.2 mm 43±1.2 mm 43±1.2 mm 53±1.2 mm 53±1.2 mm
FP max. 34.7 mm 36.7 mm 49.2 mm 51.3 mm 59.2 mm 61.2 mm

COM NO NC

COM

NC

NO

EN60947-5-1

F-112 Enclosed Switch ZC-@55

Engineering Data

■ Mechanical Durability
(for ZC-Q55)

■ Electrical Durability

Nomenclature

Changing the Terminal Protective Cover around allows the cable to be pulled out from either the right or the left.

Note: M4 binding head screws (with toothed washers) are used as the terminal screws.

Durability (x 10

4

operations)

Operating temperature: 20±2°C
Operating humidity: 65±5%
No load
Operating frequency: 120 operations/min

OT (mm)

Durability (x 10

4

operations)

Operating temperature: 20±2°C
Operating humidity: 65±5%
Operating frequency: 20 operations/min

Switching current (A

)

Roller

Plunger

Case

NC fixed contact
Moving contact

NO fixed contact

Seal rubber

Switch

Packing

Terminal
Protective
Cover

Common
terminal
(COM)

Normally
open
terminal
(NO)

Normally
closed
terminal
(NC)

Enclosed Switch ZC-@55 F-113

Limit

Switches

Dimensions

Note: 1. All units are in millimeters unless otherwise indicated.

2. Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.

15

(15)

(21 × 21)

(21 × 21)

Plunger
ZC-D55

Panel Mount Plunger
ZC-Q55

22 max.

Terminal
Protective
Cover

Two, 4.3±0.1 dia.
mounting holes

7.8 dia.
(see note)

14 dia

Seal rubber (NBR)

Note: Stainless steel plunger

Note: 1. Stainless steel plunger

2. The length of the imperfect threads
is 1.5 mm maximum.

3. Do not use the M14 mounting
screw and the case mounting hole
at the same time.

Terminal
Protective
Cover

Two, 4.3±0.1 dia.
mounting holes

Seal rubber (NBR)

22 max.

7.8 dia.
(see note 1)

Two hexagon nuts
(thickness: 3
width: 17)

(See
note 2)

M14 × 1 mounting screw

F-114 Enclosed Switch ZC-@55

15

15

(21

× 21)

(21

× 21)

15

15

34.6

15

(21

× 21)

(21

× 21)

(21

× 21)

5

50R

Panel Mount Roller Plunger
ZC-Q2255

Note: 1. Stainless sintered alloy roller

2. The length of the imperfect

threads is 1.5 mm maximum.

3. Do not use the M14 mounting
screw and the case mounting
hole at the same time.

Terminal
Protective
Cover

Two, 4.3±0.1 dia.
mounting holes

Seal rubber (NBR)

22 max.

11 dia. × 4.7
(see note 1)

Two hexagon nuts
(thickness: 3
width: 17)

(See
note 2)

Set position
indication line

Panel Mount Crossroller Plunger
ZC-Q2155

Note: 1. Stainless sintered alloy roller

2. The length of the imperfect
threads is 1.5 mm maximum.

3. Do not use the M14 mounting
screw and the case mounting
hole at the same time.

Seal rubber (NBR)

Two, 4.3±0.1 dia.
mounting holes

Two hexagon nuts
(thickness: 3
width: 17)

11 dia. × 4.7
(see note 1)

Set position
indication
line

Terminal
Protective
Cover

22 max.

Sealed Roller Plunger
ZC-N2255

9.5 dia. × 4.7
(see note)

Rubber boot
(chloroprene
rubber)

Seal rubber (NBR)

Two, 4.3±0.1 dia.
mounting holes

Terminal
Protective
Cover

22 max.

Note: Stainless sintered alloy roller

Sealed Crossroller Plunger
ZC-N2155

Rubber boot
(chloroprene
rubber)

Two, 4.3±0.1 dia.
mounting holes

Terminal
Protective
Cover

9.5 dia. × 4.7
(see note)

Seal rubber (NBR)

Note: Stainless sintered alloy roller

Short Hinge Roller Lever
ZC-W55

22 max.

t = 1
(see note)

22 max.

Two, 4.3±0.1 dia.
mounting holes

Seal rubber (NBR)

Note: Stainless steel lever

Terminal
Protective
Cover

M14 × 1 mounting
screw

M14 × 1 mounting
screw

Enclosed Switch ZC-@55 F-115

Limit

Switches

15

(21 × 21)

34.6

15

(21 × 21)

34.6

15

34.6

15

34.6

(21 × 21)

(21 × 21)

15

34.6

(21 × 21)

70R

50R

70R

54R

73R

Hinge Lever
ZC-W155

22 max.

Terminal
Protective
Cover

Two, 4.3±0.1 dia.
mounting holes

t = 1
(see note)

Seal rubber (NBR)

Note: Stainless steel lever

t = 1
(see note1)

22 max.

Terminal
Protective
Cover

Two, 4.3±0.1 dia.
mounting holes

Seal rubber (NBR)

12.7 dia. × 7.5
(see note 2)

Note: 1. Stainless steel lever

2. Stainless steel roller

Short Hinge Roller Lever
ZC-W255

Hinge Roller Lever
ZC-W2155

t = 1
(see note1)

22 max.

Terminal
Protective
Cover

Two, 4.3±0.1 dia.
mounting holes

Seal rubber (NBR)

12.7 dia. × 7.5
(see note 2)

Note: 1. Stainless steel lever

2. Stainless steel roller

Note: 1. Stainless steel lever

2. Stainless steel roller

t = 1
(see note1)

22 max.

Terminal
Protective
Cover

Two, 4.3±0.1
dia. holes

Seal rubber (NBR)

12.7 dia. × 7.5
(see note 2)

Operating
direction

Operating
direction

Angle of
roller
swing:
90

°

t = 1
(see note1)

22 max.

Terminal
Protective
Cover

Seal rubber (NBR)

12.7 dia. × 7.5
(see note 2)

Angle of
roller
swing:
90°

Two, 4.3±0.1 dia.
mounting holes

Note: 1. Stainless steel lever

2. Stainless steel roller

One-way Action Short Hinge Roller Lever
ZC-W355

One-way Action Hinge Roller Lever
ZC-W3155

F-116 Enclosed Switch ZC-@55

■ Operation Indicator-equipped Models

All the models can be equipped upon request with a operation indicator to facilitate maintenance and inspection.
Because the indicator is incorporated in the Terminal Protective Cover, the dimensions of the Limit Switch are not affected. In this model, the lead

wire is to be connected to the screw terminal. (A connecting washer is provided on the tip of the lead wire).
The lead wire can be connected to either the NC or NO terminal.
Operating characteristics are the same as the standard model from which the operation indicator equipped model is fabricated.

AC Operation

The operating voltage range is from 90 to 250 VAC.
The dimensions are the same as the standard type. The top of the

Terminal Protective Cover is transparent to allow checking the opera­tion easily.

When placing your order for the indicator equipped, AC-operated
model, add suffix “L” to the end of the model number.

Example:

Standard type: ZC-Q2255
Indicator equipped type: ZC-Q2255-L

Contact Circuit

Note: If the wiring is as shown above, the operation of the respective

parts will be as follows:

DC Operation

The DC-operated is provided with an LED indicator.
Since a rectifier stack is incorporated into the unit to permit reversing

the polarity, this type can also operate on AC power source. An exter­nal 24VDC power supply can be used, eg. OMRON S8VS or S82K.

The LED projects from the housing for easy visibility.
When placing your order, add suffix “L2” to “L5” to the model number

of the standard type.

Example:

Standard type: ZC-Q2255
Indicator equipped type: ZC-Q2255-L2

Contact Circuit

Note: If the wiring is as shown above, the operation of the respective

parts will be as follows:

NC terminal

NO terminal

Contact Neon lamp Load Actuator

NC ON Does not operate Operates

OFF Operates Does not

operate

NO ON Does not operate Does not

operate

OFF Operates Operates

Neon lamp position

Terminal Protective Cover (transparent)

Power source

Neon lamp

R = 240 k

Ω

Load

Built-in switch

Power source

Neon lamp

R = 240 kΩ

Load

Built-in switch

Type Voltage rating Leakage current Internal

resistance

L2 12 V Approx. 2.4 mA 4.3 kΩ
L4 24 V Approx. 1.2 mA 18 kΩ

NC terminal

NO terminal

Contact LED Load Actuator

NC ON Does not operate Operates

OFF Operates Does not operate

NO ON Does not operate Does not operate

OFF Operates Operates

LED

Power source

Resistance

Load

Built-in switch

LED

Power source

Resistance

Load

Built-in switch

LED

Enclosed Switch ZC-@55 F-117

Limit

Switches

Molded Terminal Models

■ Molded Terminal Model

The molded-terminal model is available with right-hand, left-hand
and underside leads and is recommended for use where the Switch
is exposed to dust, oil or moisture.

The molded-terminal model is not approved by UL and CSA.

Note: When placing your order for the Switch, specify the required

length of V.C.T. cable in addition to the model number of the
Switch.

Example:

Standard type: ZC-Q2155
Location of lead output: Underside
Length of lead: 1 m (V.C.T. lead)
When placing your order for the above Switch, specify the model
number as ZC-Q2155-MD VCT 1 m.

Suffix by Location of Lead Outlet

Lead Supplies

ML

MR

MD

Location of lead output Model

COM, NC and NO

Right-hand ZC-@-MR
Left-hand ZC-@-ML
Underside ZC-@-MD

Leads Nominal

cross-sectional area

Finished outside

diameter

Terminal connections Standard length

V.C.T. (vinyl cabtire cable)

1.25 mm

2

3 core: 10.5 dia. Black: COM

White: NO
Red: NC

1, 3, 5 m

F-118 Enclosed Switch ZC-@55

Precautions

■ Correct Use

Dog Angle

When operating the roller type, be sure to set the dog angle to less
than 30° (even when operating at a low speed). Operating the model
at a dog angle exceeding 30° will soon cause abrasion or damage.
Do not apply a twisting force to the plunger. Set the OT to 70% to
100% of the specified value so that the actuator will not exceed the
OT.

Handling

When detaching the Terminal Protective Cover, insert a screwdriver
and apply a force in the opening direction. Do not use excess force to
remove the cover. Doing so may cause deformation in the fitting sec­tion and reduce the holding force.

When mounting the Terminal Protective Cover to the case, align the
cover on the case and then press the cover down to mount it firmly. If
the cover is pressed down in an inclined position, rubber packing will
deform and thus affect the sealing capability.

• A 8.5- to 10.5-dia. cable can be applied as seal rubber for the lead

wire outlet. (Use two- or three-core cable of VCT1.25 mm

2

.)

• Use weather-proof rubber (chloroprene rubber) as seal rubber for

the ZC-N22(21)55.

Mounting

• When mounting the Switch with screws on a side surface, fasten

the Switch with M4 screws and use washers, spring washers, etc.,
to ensure secure mounting.

Mounting Holes

• When mounting the Panel Mount-type Enclosed Switch (ZC-Q55,

ZC-Q2255, or ZC-Q2155) with screws on a side surface, remove
the hexagonal nuts from the actuator.

Mounting Hole Dimensions

Tightening Torque

A loose screw may result in a malfunction. Be sure to tighten each
screw to the proper tightening torque as shown below.

Operation

With the ZC-Q22(21)55, an appropriate OT line is marked on the
plunger. Set the OT so that it is between the two X-surface lines.

Micro-load Applicable Ranges

Using a standard load switch for opening and closing a micro-load
circuit may cause wear on the contacts. Use the switch within the
operating range. (Refer to the diagram below.) Even when using
micro-load models within the operating range shown below, if inrush
current occurs when the contact is opened or closed, it may cause
the contact surface to become rough, and so decrease life expect­ancy. Therefore, insert a contact protection circuit where necessary.
The minimum applicable load is the N-level reference value. This
value indicates the malfunction reference level for the reliability level
of 60% (λ

60

). The equation λ60 = 0.5 × 10−6/operations indicates that

the estimated malfunction rate is less than 1/2,000,000 operations
with a reliability level of 60%.

Screwdriver

Terminal Protective Cover

Rubber packing

Rubber packing

Two, 4.3-dia. or M4 screw holes

No. Type Torque

1 Terminal screw 0.78 to 1.18 N·m
2 Panel mounting screw 4.90 to 7.84 N·m
3 Side mounting screw 1.18 to 1.47 N·m

Model ZC-@55-01 ZC-@55
Minimum

applicable load

1 mA at 5 VDC 160 mA at 5 VDC

0

14.5

+0.2

dia.

Appropriate OT line

X-surface

30

24

12

5

0

1 10 100 1,0000.1

100 mA

1 mA

26 mA

0.8 W

100 mA 160 mA

Voltage (VDC)

Operating area for
ZC-@55-01 micro­load models

Operating
area for
ZC-@55
standard
models

Current (mA)

Unusable
area

In the interest of product improvement, specifications are subject to change without notice.

ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.

Cat. No. C025-E1-09