Heavy-Duty Safety Limit Switch
D4B-N
Positive Action Limit Switches with
Snap and Slow Action Contacts for
Critical Switching Applications
All feature direct drive contacts to
insure contact opening of double break
contacts even with contact welding due
to overload currents
Enclosure rating meets IP67 and
NEMA 3, 4, 4X, 6P and 13
Modular construction with four position
turret head
Three-conduit switch body available for
easy wiring
Approved Standards:
File No.
Agency
ge cy
Standard
S
a da d
Snap-action
Slow-action
TÜV
Rheinland
EN60947-5-1
With
Without
R9151643
BIA
EN60947-5-1
GS-ET-15
9202158 and 9309655
UL
UL508
E76675
CSA
CSA C22.1
No.14
LR45746
R9850211
R9151372
9202158
Ordering Information
SWITCHES
Description
Part number
Actuator
Side rotary
Roller lever, nylon,
17.5 mm ((0.69 in)) dia.
Adjustable roller lever,
rubber, 50.0 mm (1.97 in) dia. *
Adjustable roller lever, nylon,
17.5 mm (0.69 in) dia. *
Conduit type
1NC +1NO
(Snap action)
1NC +1NO
(Slow action)
2NC
(Slow action)
1/2-14NPT
(1 conduit)
D4B-3111N
D4B-3511N
D4B-3A11N
1/2-14NPT
(3 conduits)
D4B-7111N
D4B-7511N
D4B-7A11N
1/2-14NPT
(1 conduit)
D4B-3113N
D4B-3513N
D4B-3A13N
1/2-14NPT
(3 conduits)
D4B-7113N
D4B-7513N
D4B-7A13N
1/2-14NPT
(1 conduit)
D4B-3116N
D4B-3516N
D4B-3A16N
1/2-14NPT
(3 conduits)
D4B-7116N
D4B-7516N
D4B-7A16N
(This table continues on the next page.)
D4B-N
D4B-N
Ordering Information Table – continued from previous page
Description
Part number
Actuator
Adjustable rod lever,
150 mm (5.91 in) L *
Top plunger
Plain
Roller
Wobble stick **
Coil spring, 6.5 mm (0.26 in) dia.
x 114.4 mm (4.51 in) L
Plastic rod, 6.5 mm (0.26 in) dia.
x 114.4 mm (4.51 in) L
Note:
Conduit type
1NC +1NO
(Snap action)
1NC +1NO
(Slow action)
2NC
(Slow action)
1/2-14NPT
(1 conduit)
D4B-3117N
D4B-3517N
D4B-3A17N
1/2-14NPT
(3 conduits)
D4B-7117N
D4B-7517N
D4B-7A17N
1/2-14NPT
(1 conduit)
D4B-3170N
D4B-3570N
D4B-3A70N
1/2-14NPT
(3 conduits)
D4B-7170N
D4B-7570N
D4B-7A70N
1/2-14NPT
(1 conduit)
D4B-3171N
D4B-3571N
D4B-3A71N
1/2-14NPT
(3 conduits)
D4B-7171N
D4B-7571N
D4B-7A71N
1/2-14NPT
(1 conduit)
D4B-3181N
---
D4B-3A81N
1/2-14NPT
(3 conduits)
D4B-7181N
---
D4B-7A81N
1/2-14NPT
(1 conduit)
D4B-3187N
---
D4B-3A87N
1/2-14NPT
(3 conduits)
D4B-7187N
---
D4B-7A87N
marking indicates the contacts which have positive opening mechanism approced by TÜV Rheinland.
* The adjustable roller lever models are approved by the TÜV (EN standard) as positive opening, but they do not conform to the
BIA (GS-ET-15 standard) and SUVA.
** The models are not approved by TÜV, BIA and SUVA as positive opening.
MODEL NUMBER LEGEND
D4B -
N
1
2
3
1. Conduit
1: PG13.5 (standard)
2: G1/2 (PF1/2) (standard)
3: 1/2-14NPT (standard)
5: PG13.5 (3-conduit)
6: G1/2 (PF1/2) (3-conduit)
7: 1/2-14NPT (3-conduit)
2. Built-in Switch
1: 1NC/1NO (Snap-action)
A: 2NC (Slow-action)
5: 1NC/1NO (Slow-action)
2
3. Actuator
11: Roller lever (standard)
16: Adjustable roller lever
17: Adjustable rod lever
70: Top plunger
71: Top roller lever
81: Coil spring
87: Plastic rod
00: Switch box (without head)
D4B-N
D4B-N
Replacement Parts
BUILDING A PART NUMBER
The D4B-N family of switches features plug-in
construction with interchangeable parts for simplified long-term maintenance. The illustration
at right shows the parts that make up a whole
switch, as well as how to read a part number as
the sum of its parts.
Switch body
=
Operating Head
Lever
+
+
+
D4B-0010N +
Note: The design of D4B-N switches does not
share compatible parts with Omron’s
D4B-5000 series.
ex. D4B-3111N
=
D4B-3100N
D4B-0001N
SWITCH BODIES
Standard EN50041 type
3-conduit type
1/2-14NPT
1/2-14NPT
1NC/1NO
(Snap-action)
D4B-3100N
D4B-7100N
1NC/1NO
(Slow-action)
D4B-3500N
D4B-7500N
2NC
(Slow-action)
D4B-3A00N
D4B-7A00N
OPERATING HEADS
Actuator
Description
Part number
Side rotary
Standard
D4B-0010N
Top plunger
Plain
D4B-0070N
Roller, 12.7 mm (0.5 in) dia. stainless steel roller
D4B-0071N
Coil spring, 6.5 mm (0.26 in) dia. x 114.4 mm (4.51 in) L
D4B-0081N
Plastic rod, 6.5 mm (0.26 in) dia. x 114.4 mm (4.51 in) L
D4B-0087N
Wobble stick
LEVERS (FOR SIDE ROTARY SWITCHES)
Description
Roller lever
Adjustable
j
lever
Part number
17.5 mm (0.69 in) dia. nylon roller
D4B-0001N
50 mm (1.97 in) dia. rubber roller
D4B-0003N
Roller, 19 mm (0.75 in) dia. nylon roller
D4B-0006N
Rod, 145 min/max. (5.71 in)
D4B-0007N
3
D4B-N
D4B-N
Specifications
RATINGS
1. TÜV Rheinland: AC-15, 2 A/400 V
2. UL (UL5081CSA C22.2 No.14) A600
Rated voltage
120 VAC
Current
Switching power
Continuous
Make
Break
Make
Break
10 A
7,200 VA
720 VA
60 A
6A
240 VAC
30 A
3A
480 VAC
15 A
1.5 A
600 VAC
12 A
1.2 A
CHARACTERISTICS
Switch type
Snap-action
Slow-action
Operating speed
1 mm/s to 50 cm/s
Operating frequency
Mechanical: 120 operations/min
Electrical: 30 operations/min
Rated frequency
50/60 Hz
Insulation resistance
100 MΩ min. (at 500 VDC) between terminals of the same polarity and between
each terminal and non-current-carrying part
Contact resistance
25 mΩ max. (initial value)
25 mΩ max. (initial value)
Between terminals of same polarity
Uimp 2.5 kV
Uimp 4 kV
Between terminals of different polarity
---
Uimp 4 kV
Between current-carrying metal parts and ground
Uimp 4 kV
Uimp 4 kV
Between each terminal and
non-current-carrying parts
Uimp 4 kV
Uimp 4 kV
Dielectric strength
Rated insulation voltage (Ui)
600 VAC (EN60947-5-1)
Counter electromotive voltage at switching
1,500 VAC max. (EN60947-5-1)
Pollution degree
3 (EN60947-5-1)
Short-circuit protective device
10-A fuse (type gI or gG) (IEC269)
Conditional short-circuit current
100 A (EN60947-5-1)
Conventional enclosed thermal current (Ithe)
20 A (EN60947-5-1)
Electric shock protection class
Class I (with grounding terminal)
Vibration resistance
Malfunction: 10 to 55 Hz, 1.5-mm double amplitude
Shock resistance
Destruction: 1,000 m/s2 min. {approx. 100G min.}
Malfunction: 300 m/s2 min. {approx. 30G min.}
Life expectancy (See Note 2.)
Mechanical: 30,000,000 operations min.
Electrical:
500,000 operations min.
Mechanical: 10,000,000 operations min.
Electrical:
500,000 operations min.
Contact gap
2 x 0.5 mm min.
2 x 2 mm min.
Bounce time
3 ms min.
Same as the operating speed
Ambient temperature
Operating: –40°C to 80°C (–40°F to 176°F) with no icing (See Note 4.)
Ambient humidity
Enclosure rating
g
Weight
Operating: 95% max.
UL
3, 4, 4X, 6P and 13
NEMA
3, 4, 4X, 6P and 13
IEC529
IP67 (EN60947-5-1)
Approx. 250 g
Note: 1. The above values are for initial operation.
2. The life expectancy is for an ambient temperature of 5°C to 35°C (41°F to 95°F) and ambient humidity of 40% to 70%. For further conditions, consult your OMRON sales representative.
3. The values in this table are for an ambient temperature of 5°C to 35°C (41°F to 95°F) and ambient humidity of 40% to 70%. For
further conditions, consult your OMRON sales representative.
4. –25°C to 80°C (–40°F to 176°F) for the wobble stick actuator type.
4
D4B-N
D4B-N
OPERATING CHARACTERISTICS
Legend: OF = Operating Force (max.); RF = Reset Force (min.); OT = Overtravel (min.); PT = Pretravel;
MD = Movement Differential (max.); PO = Positively Open (max.); TT = Total Travel; OP = Operating Position
Part number
Description
OF
D4B-11N
Side rotary, nylon roller
lever
D4B-13N
RF
OT
PT
MD*
PO**
TT
OP
960 g
50 g
(2.12 lbs.) (1.76 oz.)
50
21±3
12
35
75
---
Side rotary, adjustable
roller lever
740 g
50 g
(1.63 lbs.) (1.76 oz.)
50
21±3
12
35
75
---
D4B-16N
Side rotary, adjustable
roller lever
960 g
50 g
(2.12 lbs.) (1.76 oz.)
50
21±3
12
35
75
---
D4B-17N
Side rotary, adjustable
rod lever
216 g
(7.62 oz.)
50
21±3
12
35
75
---
D4B-70N
Plain top plunger
1900 g
200 g
(4.19 lbs.) (7.05 oz.)
5 mm
(0.20 in)
2 mm
(0.08 in)
1 mm
(0.04 in)
3.2 mm
(0.13 in)
7 mm
(0.28 in)
35±1 mm
(1.38±0.04 in)
D4B-71N
Roller top plunger
1900 g
200 g
(4.19 lbs.) (7.05 oz.)
5 mm
(0.20 in)
2 mm
(0.08 in)
1 mm
(0.04 in)
3.2 mm
(0.13 in)
7 mm
(0.28 in)
48±1 mm
(1.89±0.04 in)
D4B-81N
Coil spring wobble stick
150 g
(5.29 oz.)
---
---
15
---
---
---
---
D4B-87N
Plastic rod wobble stick
150 g
(5.29 oz.)
---
---
15
---
---
---
---
11 g
(0.39 oz.)
Note: * Does not apply to DPST-NC (slow action) type switches.
** Actuator travel necessary to assure positive contact opening. Does not apply to SPST (snap-action) type switches.
Operating characteristics for D4B-16N switches were measured with the roller lever at 31.5 mm.
Operating characteristics for D4B-17N switches were measured with the rod lever set at 140 mm.
Engineering Data
ELECTRICAL LIFE EXPECTANCY
(SNAP-ACTION)
(cos = 1)
(cos = 0.4)
10,000
250 VAC
3,000
1,000
700
500
500 VAC
300
Switching current (A)
7,000
5,000
Operations (x 10 3 )
7,000
5,000
Operations (x 10 3 )
10,000
Operating frequencies:
30 times/min., cosf = 1
Operating frequencies:
30 times/min., cosf = 0.4
3,000
250 VAC
1,000
700
500
300
500 VAC
Switching current (A)
5
D4B-N
D4B-N
Construction
Turret Head
Rotate the head to four 90 positions to fit the application.
Just loosen the head mounting screws and rotate.
Operating Position Mark
(arrow)
6
Safety-oriented Lever Setting
Grooves which engage the lever every 90° are cut in the
operation indicator disk to prevent the lever from slipping
against the rotary shaft.
Equipped with Operation Display Plate
An optimum overtravel (OT) value may be secured by
setting a desired OT value with a projection
Push and rotate
Operating Direction Selector
Side rotary heads convert to
clockwise, counterclockwise
or bidirectional operation in
Switch Box Material
seconds. Just push the button Aluminum die-cast
at the base of the head and
rotate to desired position indicated by a pointer.
Shearing Force Contact Separating Mechanism
(NC Contact Section Only)
Should any abnormality occur in the contact area, the
contacts are positively pulled apart from each other by
shearing force.
Conduit Entrance
Standard type is 1/2-14 NPT, but PG13.5 for Europe
and PF1/2 for Asia are available on special order.
Ground Terminal Screw
A ground terminal is provided to improve safety.
Contact Material
Ag alloy
D4B-N
D4B-N
Operation
POSITIVE CONTACT OPENING MECHANISM
1NO/1NC Contact (Snap-action)
If metal deposition between mating contacts occurs on the NC contact side, they can be pulled apart by the shearing force and tensile force
generated when part B of the safety cam or plunger engages part A of the movable contact blade. When the safety cam or plunger is moved in
the direction of the arrow, the Limit Switch releases.
1. When metal deposition occurs.
2. When contacts are being pulled apart.
3. When contacts are completely
pulled apart.
Movable contact
Safety cam directly
pushes up the
movable contact
blade.
Movable contact
blade
Plunger
A
B
Safety cam
Fixed contact (NC)
1NC/1NO Contact (Slow-action)
Fixed contact (NC)
Conforms to IEC 947-5-1 Positive Opening
Contact spring
Movable contact
When metal deposition occurs, the contacts
are separated from each other by the plunger
being pushed in.
Plunger
Return spring
2NC Contact (Slow-action)
Fixed contact (NC)
Contact spring
Movable contact
Plunger
Return spring
Conforms to EN60947-5-1
When metal deposition occurs, the contacts
are separated from each other by the plunger
being pushed in.
is marked on the product to indicate approval of positive opening.
Contact Form (EN50013)
Model
1NC/1NO
Contacts
(Snap-action)
Contact
13
Diagrams (See Note.)
Za
14
Only 11 to 12 contacts are
positive opening.
0
2 mm max.
(7 mm)
0
2 mm max.
(7 mm)
0
2 mm max.
11 to 12
13 to 14
11
1NC/1NO
Contacts
(Slow-action)
12
EN60947-5-1
conformity
12
Only 11 to 12 contacts are
positive opening.
Zb
11
23
24
EN60947-5-1
conformity
11 to 12
23 to 24
(3 mm)
2NC Contacts
(Slow-action)
Zb
11
12
21
22
Note: 1. Contact operation
Closed
Both 11 to 12 and 21 to 22
contacts are positive opening.
EN60947-5-1
conformity
(7 mm)
11 to 12
21 to 22
Open
2. The stroke value in parentheses refers to the D4B-70N.
7
D4B-N
Dimensions
Unit: mm (inch)
STANDARD SWITCHES
D4B-3111N, D4B-3511N, D4B-3A11N Roller Lever Switch, Nylon Roller
D4B-3113N, D4B-3513N, D4B-3A13N Adjustable Roller Lever Switch, Rubber Roller
8
D4B-N
D4B-N
D4B-N
D4B-3116N, D4B-3516N, D4B-3A16N Adjustable Roller Lever Switch, Nylon Roller
D4B-3117N, D4B-3517N, D4B-3A17N Adjustable Rod Lever Switch
9
D4B-N
D4B-N
D4B-3170N, D4B-3570N, D4B-3A70N Plain Top Plunger Switch
43 (1.69)
D4B-3171N, D4B-3571N, D4B-3A71N Roller Top Plunger Switch
D4B-3181N, D4B-3A81N Coil Spring Wobble Stick Switch
10
D4B-N
D4B-N
D4B-3187N, D4B-3A87N Plastic Rod Wobble Stick Switch
THREE-CONDUIT SWITCHES
D4B-7111N, D4B-7511N, D4B-7A11N Roller Lever Switch, Nylon Roller
11
D4B-N
D4B-7113N, D4B-7513N, D4B-7A13N Adjustable Roller Lever Switch, Rubber Roller
D4B-7116N, D4B-7516N, D4B-7A16N Adjustable Roller Lever Switch
12
D4B-N
D4B-N
D4B-N
D4B-7117N, D4B-7517N, D4B-7A17N Adjustable Rod Lever Switch
D4B-7170N, D4B-7570N, D4B-7A70N Plain Top Plunger Switch
13
D4B-N
D4B-7171N, D4B-7571N, D4B-7A71N Roller Top Plunger Switch
D4B-7181N, D4B-7A81N Coil Spring Wobble Stick Switch
14
D4B-N
D4B-N
D4B-N
D4B-7187N, D4B-7A87N Plastic Rod Wobble Stick Switch
ROLLER LEVERS
D4B-0001N
D4B-0002N
25.8
16.8
17.5 dia. x 6.8 resin roller
16
50-dia. rubber roller
(1.96)
11.7
6
30 dia.
31.5
(1.24)
7.3 dia.
R33.7
(1.33)
M5 hexagon
clamping
screws
18
15
11.5
D4B-0003N
M5 x 12 hexagon
clamping screws
12
D4B-0004N
34
24.8
50-dia. rubber roller
(1.96)
24.2
6
50-dia. rubber roller
14.9
12.8
30 dia.
30 dia.
R41 to 78.5
(1.61 to 3.09)
adjustable
6
R63
(2.48)
M5 x 16 hexagon
clamping screws
16
M5 x 12 hexagon
clamping screws
11.4
3.2
15
D4B-N
D4B-N
D4B-0005N
D4B-0006N
26
19 dia. x 7 resin roller
20.2
12.8
17
12
17.5 x 7-dia.
stainless steel
roller
6.4 adjusting scale
Adjustable
range
25 to 89
(0.98 to 3.50)
R31.5
(1.24)
M5 x 12
hexagon
clamping
screws
11.5
15
97
M5 hexagon
clamping
screws
3.2
15.9
20
D4B-000RN
D4B-0007N
17.8
19 dia. x 7 resin roller
21.6
3 dia.
145 max.
(5.71)
33.7
(1.33)
5.4
7.3 dia.
18
160
M5 hexagon
clamping
screws
28
12
M5 hexagon
clamping
screws
17
Installation
OPERATION SELECTION
Side rotary models of D4B-N limit switches can be set for
clockwise (CW), counterclockwise (CCW) or two-way
(CW + CCW) operation to match the application. Use the
following procedure:
1. Remove the head by loosening the four screws that secure
the head to the switch body.
2. Turn over the head to set the desired operation (CW, CCW,
or CW + CCW). The desired operation can be selected by
setting the mode selector knob as shown in the figure. This
knob is factory set for CW + CCW (two-way) operation.
16
12.5
Stainless rod
12
11
D4B-N
D4B-N
Precautions
If the D4B-N is applied to an emergency stop circuit or safety
circuit for prevention of injury, use the D4B-N model that has an
NC contact equipped with a force-separation mechanism, and
make sure that the D4B-N operates in the positive mode.
Also, secure the D4B-N with screws or equivalent parts that
are tightened in a single direction so that the D4B-N cannot be
easily removed. Then provide a protection cover for the D4B-N
and post a warning label near the D4B-N.
In order to protect the D4B-N from damage due to shortcircuiting, connect a fuse breaking a current 1.5 to 2 times higher
than the rated current in parallel with the D4B-N.
MOUNTING
Use four M5 screws with washers to mount the standard model.
Be sure to apply the proper torque to tighten each screw. The
D4B-N can be mounted more securely by using the four
screws plus two 5 –0.05/–0.15-mm protruding parts, each of which
has a maximum height of 4.8 mm as shown below.
Mounting Dimensions (M5)
Standard Model
3-conduit Model
If an application satisfying EN standards is to employ the D4BL,
apply the 10-A gI or gG fuse approved by IEC269.
Do not apply the D4B-N to the door without applying a stopper
to the door.
60
If the D4B-N is used with the actuator normally pressed, the
D4B-N may malfunction or may soon have reset failures. Be
sure to check and replace the D4B-N regularly.
59.3±0.1
OPERATING ENVIRONMENT
The D4B-N is for indoor use. The D4B-N may malfunction if
the D4B-N is used outdoors. Be sure to use a model with a
lever-type actuator for outdoor use instead.
Do not use the D4B-N in the following places:
•
•
Places with radical temperature changes.
Places with excessive humidity that may cause condensation.
Places with excessive vibration.
Places where metal dust, oil, or chemical may be sprayed to
the D4B-N.
•
•
TIGHTENING TORQUE
(3)
30
40
42
Protruding portions
27±0.1
–0.05
5–0.15
dia. holes, max. 5 height
30
Changes in Actuator Mounting Position
To change the angle of the lever, loosen the hexagon-head bolts
on the side of the lever.
The operation indicator plate has protruding parts which engage
with the lever, thus allowing changes to the lever position by 90°.
The back of the operation indicator plate has no protruding parts.
The lever can be set at any angle by attaching the operation
indicator plate to the Switch so that this side will face the lever. In
this case, however, the D4B-N will not be approved by SUVA or
BIA. Make sure that the lever engages with the operation
indicator plate securely so that the lever will not slip.
Changes in Head Mounting Position
By removing the screws on the four corners of the head, the
head can be reset in any of four directions. Make sure that no
foreign materials will penetrate through the head.
Since loose screws may
(4)
cause a malfunction,
tighten each screw to the
appropriate torque.
WIRING
(1)
Do not connect the bare lead wires directly to the terminals, but
you must connect each of them by using an insulation tube and
M3.5 round solderless terminals and tighten each terminal screw
within the specified torque range.
(5)
(2)
No. Type
Proper tightening torque
1
Terminal screw
0.59 to 0.78 N m {6 to 8 kgf cm}
2
Cover-mounting
screw
1.18 to 1.37 N m {12 to 14 kgf cm}
3
Head-mounting
screw
0.78 to 0.98 N m {8 to 10 kgf cm}
4
Switch-mounting
screw (M5)
4.90 to 5.88 N m {50 to 60 kgf cm}
5
Connector
1.77 to 2.16 N m {18 to 22 kgf cm}
6
Cap screw (for
three-conduit
models)
1.27 to 1.67 N m {13 to 17 kgf cm}
The proper lead wire is 20 to 14 AWG (0.5 to 2.5 mm2) in size.
dz dia.:
D dia.:
B:
L:
F:
I:
3.7
4.5
7.0
20.2
7.7
9.0 (mm)
D dia.
dz dia.
Note: Apply a tightening torque of 0.78 to 0.88 N m {8 to
9 kgf cm} to conduit models.
17
D4B-N
D4B-N
Make sure that all solderless terminals come into contact with the
casing or cover as shown below, or the cover may not be
mounted properly or the D4B-N may malfunction.
Correct
Incorrect
Avoid Damage
The load for the actuator (roller) of the Switch must be imposed
on the actuator in the horizontal direction, or the actuator or the
rotating axis may be deformed or damaged.
Terminal screw
Correct
Incorrect
Top View
Dog
Dog
Crimp-style terminal
Incorrect
Correct
Terminal screw
Terminal screw
Crimp-style
terminal
Cover
Cover
Case
Case
Crimp-style terminal
Crimp-style terminal
When Using a Long-Lever Model
When using a long-lever model like the D4B-16N or
D4B-17N, the Switch may telegraph. To avoid telegraphing,
take the following precautions.
1. Set the lever to operate in one direction. For details, see
page NO TAG, CW, CCW or Two-way Operation.
2. Modify the rear end of the dog to an angle of 15° to 30° as
shown below or to a secondary-degree curve.
θ
θ
θ 30°
15° θ 30°
3. Modify the circuit so as not to detect the wrong operating
signals.
Crimp-style terminal
CORRECT SELECTION AND USAGE OF
SWITCHES
Snap-action Switch
A snap-action switch takes only a short time to switch electric
current, which reduces contact arcing and prevents contacts from
wear and tear. For this reason, a snap-action switch is more ideal
than a slow-action switch for applications that require high repeat
accuracy, high operation frequency, and slow operating speed.
Slow-action Switch
Connector
Tighten the connector within the specified torque range. The
casing may be damaged if the connector is tightened
excessively.
If the 1/2-14NPT is used, cover the cable and conduit end with
sealing tape in order to ensure IP67.
The Pg13.5 connector must be Nippon Flex’s ABS-08Pg13.5 or
ABS-12 Pg13.5.
Use OMRON’s SC-series connector which is suited to the cable
in diameter.
When wiring the D4B-N, correctly attach the conduit cap
(provided) to the unused conduit opening and securely tighten
the cap screw within the specified torque.
18
The electric current switching time of a slow-action switch differs
in proportion to the operating speed of the switch. A slow-action
switch operates safely via direct drive positive contact opening,
even after metal deposition between mating contacts and
provides insulation capability after contact separation. Opposite
polarity ensures high contact reliability, even when voltages and
currents are small and allows switching of voltages of different
potential by contacts blocks with several contacts. For example, it
is possible to perform a control function with 220 VAC and
signalling function with 60 VDC using only one device.
Safety Switch
The NC contact section of the D4B-N’s built-in switch
incorporates a shearing force contact separating mechanism.
Based on the above mentioned switching features, the
snap-action switch can be mainly applied to positioning control
purposes and the slow-action switch can be mainly applied to
safety, and protection purposes. Both slow- and snap-action
switches conform to BS5304, IEC 204-1, and VDE 0113 safety
standard.
D4B-N
D4B-N
NOTE: DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters to inches divide by 25.4.
OMRON ELECTRONICS, INC.
OMRON CANADA, INC.
One East Commerce Drive
Schaumburg, IL 60173
885 Milner Avenue
Scarborough, Ontario M1B 5V8
1-800-55-OMRON
416-286-6465
Cat. No. CEDSAX3
10/99
Specifications subject to change without notice.
Printed in U.S.A.