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).
•
Wide standard operating temperature range:
−40°C
to +100°C (standard type).
•
Models with fluoro-rubber available for greater resistance
to chemicals.
•
Block mounting method also reduces downtime for
maintenance.
•
DPDT, double-break models available for complex
operations.
•
Approved by UL, CSA, and CCC (Chinese standard).
(Ask your OMRON representative for information on
approved model.)
Be sure to read
Safety Precautions
on page 14 to 15 and
Safety Precautions for All Limit Switches.
CSM_D4A-_N_DS_E_4_2
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
Model Number Structure
Model Number Legend
(Not all combinations are possible. Ask your OMRON representative for details.)
D4A-@@@@N (Set model number)
(1) (2) (3)
(1) Receptacle box
1
2
3
4
: 1/2-14 NPT conduit (SPDT, double-break)
: 1/2-14 NPT conduit (DPDT, double-break)
: G 1/2 conduit (SPDT, double-break)
: G 1/2 conduit (DPDT, double-break)
(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
(2) Switch Box
1
3
E
5
7
9
L
P
: SPDT, double-break, without indicator
: SPDT, double-break, neon lamp
: SPDT, double-break, LED (24 VDC, leakage current: 1.3 mA)
: DPDT, double-break, simultaneous operation, without indicator
: DPDT, double-break, sequential operation, without indicator
*1
: DPDT, double-break, center neutral operation, without indicator
*2
: DPDT, double-break, simultaneous operation, neon lamp
: DPDT, double-break, simultaneous operation, LED
*1. Use the D4A-0017N Special Head.
*2. Use the D4A-0018N Special Head.
Note: Fluoro-rubber sealed type is also available.
1
D4A-@N
DPDT, Double-break Switches
Receptacle box
Indicator
Actuator
Standard
High-sensitivity
Low-torque
Roller lever *1
High-sensitivity,
Low-torque
Maintained
*2
Sequential operation
Center neutral
operation
Standard
Vertical roller
Side plunger
Horizontal roller
Adjustable
Standard
Top plunger
Roller
Adjustable
Spring wire
D4A-4507-HN
D4A-4508N
D4A-4509N
D4A-4510N
D4A-4511N
D4A-4512N
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
UL, CSA
---
---
---
D4A-4L10N
---
---
---
---
---
D4A-4P10N
---
---
Model
D4A-4501N
D4A-4502N
D4A-4503N
D4A-4504N
D4A-4505N
D4A-4717N
D4A-4918N
D4A-4506N
D4A-4507-VN
Without indicator
Approved standards
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) With LED indicator (DC)
Model
D4A-4L01N
---
---
---
---
---
---
---
---
Model
D4A-4P01N
---
---
---
---
---
---
---
---
Plastic rod
Flexible rod
Cat whisker
D4A-4514N
UL, CSA
---
---
D4A-4515N
UL, CSA
---
---
Coil spring
D4A-4516N
UL, CSA
---
---
Note: 1. Switches are also available with
@1/2-14
NPT conduits. The model numbers correspond as follows:
(Examples) G 1/2 Conduits
1/2-14 NPT Conduits
D4A-3@@@N
D4A-1@@@N
D4A-4@@@N
D4A-2@@@N
2. 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.
*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 page 12).
*2. The Maintained Switches have a lock mechanism for the switch operation and thus use a Fork Lever Lock.
Individual Parts
Receptacle box
Type
Appearance
Model
G1/2 conduit
*1
Approved standards
1/2-14NPT conduit
*2
Model
Approved standards
SPDT dou-
ble-break
D4A-3000N
UL, CSA
D4A-1000N
UL, CSA
DPDT dou-
ble-break
D4A-4000N
UL, CSA
D4A-2000N
UL, CSA
*1. M6-screw mounting
(standard mounting)
*2. 10-32UNF-screw mounting
(standard mounting)
3
Test/Measurement
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