General-purpose Limit Switch
D4A-@N
The Limit Switch with Better Seal, Shock
Resistance, and Strength
• A double seal on the head, a complete gasket cover, and other
features ensure a better seal (meets UL NEMA 3, 4, 4X, 6P, 12,
13).
• Block mounting method to reduce weight to 290 g.
• Block mounting method also reduces downtime for mainte-
nance.
• Wide standard operating temperature range:
–40°C to 100°C (standard type).
• Models with fluoro-rubber available for greater resistance to
chemicals.
• DPDT, double-break models available for complex operations.
• Approved by UL, CSA, and CCC (Chinese standard).
Model Number Structure
■
Model Number Legend
D4A-@@@@N
1 2
3
3. Head
01:
02:
03:
04:
05:
17:
18:
06:
07-V:
07-H:
08:
09:
10:
11:
12:
14:
15:
16:
Roller lever, standard
Roller lever, high-sensitivity
Roller lever, low torque
Roller lever, high-sensitivity, low torque
Roller lever, maintained
Roller lever, sequential operation
Roller lever, center neutral operation
Side plunger, standard
Side plunger, vertical roller
Side plunger, horizontal roller
Side plunger, adjustable
Top plunger, standard
Top plunger, roller
Top plunger, adjustable
Flexible rod, spring wire
Flexible rod, plastic rod
Flexible rod, cat whisker
Flexible rod, coil spring
1. Receptacle Box
1:
1/2-14 NPT conduit (SPDT, double-break)
2:
1/2-14 NPT conduit (DPDT, double-break)
3:
G 1/2 conduit (SPDT, double-break)
4:
G 1/2 conduit (DPDT, double-break)
2. Switch Box
1:
SPDT, double-break, without indicator
3:
SPDT, double-break, neon lamp
E:
SPDT, double-break, LED
(24 VDC, leakage current: 1.3 mA)
5:
DPDT, double-break, simultaneous operation, without indi-
cator
7:
DPDT, double-break, sequential operation, without indicator
(See note 1.)
9:
DPDT, double-break, center neutral operation, without indi-
cator (See note 2.)
L:
DPDT, double-break, simultaneous operation, neon lamp
P:
DPDT, double-break, simultaneous operation, LED
Note: 1.
Use the D4A-0017N Special Head.
2.
Use the D4A-0018N Special Head.
3.
Fluoro-rubber sealed type is also available.
74
General-purpose Limit Switch
D4A-@N
Ordering Information
■
List of Models
SPDT, Double-break Switches
Receptacle box
Indicator
Actuator
Roller lever
(See note 1.)
Standard
High-sensitivity
Low-torque
High-sensitivity, Low-
torque
Maintained
(See note 2.)
Side plunger
Standard
Vertical roller
Horizontal roller
Adjustable
Top plunger
Standard
Roller
Adjustable
Flexible rod
Spring wire
Without indicator
Model
D4A-3101N
D4A-3102N
D4A-3103N
D4A-3104N
D4A-3105N
D4A-3106N
D4A-3107-VN
D4A-3107-HN
D4A-3108N
D4A-3109N
D4A-3110N
D4A-3111N
D4A-3112N
Approved
standards
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
G 1/2 Conduit
With neon lamp indicator
(AC)
Model
D4A-3301N
D4A-3302N
---
D4A-3304N
D4A-3305N
---
D4A-3307-VN
D4A-3307-HN
D4A-3308N
D4A-3309N
D4A-3310N
D4A-3311N
D4A-3312N
Approved
standards
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
D4A-3E01N
D4A-3E02N
---
---
D4A-3E05N
---
D4A-3E07-VN
---
D4A-3E08N
---
---
---
D4A-3E12N
With LED indicator (DC)
Model
Plastic rod
D4A-3114N
UL, CSA
D4A-3314N
UL, CSA
D4A-3E14N
Cat whisker
D4A-3115N
UL, CSA
D4A-3315N
UL, CSA
D4A-3E15N
Coil spring
D4A-3116N
UL, CSA
D4A-3316N
UL, CSA
D4A-3E16N
Note: 1.
The lever is not included with the Roller Level Models. Select the lever from those listed in this data sheet and order it separately (refer
to
Levers
on pages 92 and 93).
2.
The Maintained Switches have a lock mechanism for the switch operation and thus use a Fork Lever Lock.
3.
Switches are also available with
@1/2-14
NPT conduits. The model numbers correspond as follows:
G 1/2 Conduits 1/2-14 NPT Conduits
D4A-3@@@N D4A-1@@@N
D4A-4@@@N D4A-2@@@N
4.
Switches are also available with fluoro-rubber seals for higher resistance to chemicals. (The operating temperature range for these
Switches, however, is
−
10 to 120
°
C.) Add “-F” to the model number. (Example: D4A-3101N becomes D4A-3101N-F.) Ask your nearest
OMRON representative for details.
General-purpose Limit Switch
D4A-@N
75
DPDT, Double-break Switches
Receptacle box
Indicator
Actuator
Roller lever
(See note 1.)
Standard
High-sensitivity
Low-torque
High-sensitivity, Low-
torque
Maintained
(See note 2.)
Sequential operation
Center neutral opera-
tion
Side plunger
Standard
Vertical roller
Horizontal roller
Adjustable
Top plunger
Standard
Roller
Adjustable
Flexible rod
Spring wire
Without indicator
Model
D4A-4501N
D4A-4502N
D4A-4503N
D4A-4504N
D4A-4505N
D4A-4717N
D4A-4918N
D4A-4506N
D4A-4507-VN
D4A-4507-HN
D4A-4508N
D4A-4509N
D4A-4510N
D4A-4511N
D4A-4512N
Approved
standards
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
G 1/2 Conduit
With neon lamp indicator
(AC)
Model
D4A-4L01N
---
---
---
---
---
---
---
---
---
---
---
D4A-4L10N
---
---
Approved
standards
UL, CSA
---
---
---
---
---
---
---
---
---
---
---
UL, CSA
---
---
D4A-4P01N
---
---
---
---
---
---
---
---
---
---
---
D4A-4P10N
---
---
With LED indicator (DC)
Model
Plastic rod
D4A-4514N
UL, CSA
---
---
---
Cat whisker
D4A-4515N
UL, CSA
---
---
---
Coil spring
D4A-4516N
UL, CSA
---
---
---
Note: 1.
The lever is not included with the Roller Level Models. Select the lever from those listed in this data sheet and order it separately (refer
to
Levers
on pages 92 and 93).
2.
The Maintained Switches have a lock mechanism for the switch operation and thus use a Fork Lever Lock.
3.
Switches are also available with
@1/2-14
NPT conduits. The model numbers correspond as follows:
G 1/2 Conduits 1/2-14 NPT Conduits
D4A-3@@@N D4A-1@@@N
D4A-4@@@N D4A-2@@@N
4.
Switches are also available with fluoro-rubber seals for higher resistance to chemicals. (The operating temperature range for these
Switches, however, is
−
10 to 120
°
C.) Add “-F” to the model number. (Example: D4A-4501N becomes D4A-4501N-F.) Ask your nearest
OMRON representative about delivery times and prices.
76
General-purpose Limit Switch
D4A-@N
Individual Parts
Replacement of Parts
Because the D4A-@N employs block mounting construction, the
switch box, receptacle, and operating head may be ordered as a
complete assembly or individually as replacement parts.
Receptacle
Switch box
Head
Lever
Levers for Roller Lever Switches are
optionally available. Select the lever from
those listed in this datasheet and order
(refer to
Levers
on pages 92 and 93).
D4A-1101N
D4A-1000N
D4A-0100N
D4A-0001N
Receptacle Box
Type
Appearance
1/2-14NPT conduit (See note 2.)
Model
SPDT
double-
break
D4A-1000N
Approved
standards
UL, CSA
G1/2 conduit (See note 1.)
Model
D4A-3000N
Approved
standards
UL, CSA
DPDT
double-
break
D4A-2000N
UL, CSA
D4A-4000N
UL, CSA
Note: 1.
M6-screw mounting (standard mounting)
2.
10-32UNF-screw mounting (standard mounting)
Switch Box
Type
Appearance
Without indicator
Model
SPDT
double-break
D4A-0100N
Approved
standards
UL, CSA
With neon lamp indicator
(AC)
Model
D4A-0300N
Approved
standards
UL, CSA
With LED
indicator (DC)
Model
D4A-0E00N
(Without indicator lamp)
DPDT
double-break
Simultaneous
operation
D4A-0500N
UL, CSA
UL, CSA
UL, CSA
D4A-0L00N
---
---
---
---
---
D4A-0P00N
---
---
Sequential oper- D4A-0700N
ation
(Without indicator lamp)
Center neutral
operation
D4A-0900N
General-purpose Limit Switch
D4A-@N
77
Embedded System
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