DGen4eraAl-pu-rp@oseNLimit Switch
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
1. Receptacle Box
3. Head
01: Roller lever, standard
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)
02: Roller lever, high-sensitivity
03: Roller lever, low torque
04: Roller lever, high-sensitivity, low torque
05: Roller lever, maintained
17: Roller lever, sequential operation
18: Roller lever, center neutral operation
06: Side plunger, standard
2. Switch Box
1:
3:
E:
SPDT, double-break, without indicator
SPDT, double-break, neon lamp
SPDT, double-break, LED
(24 VDC, leakage current: 1.3 mA)
07-V: Side plunger, vertical roller
07-H: Side plunger, horizontal roller
08: Side plunger, adjustable
09: Top plunger, standard
5:
7:
9:
DPDT, double-break, simultaneous operation, without indi-
cator
DPDT, double-break, sequential operation, without indicator
(See note 1.)
10: Top plunger, roller
DPDT, double-break, center neutral operation, without indi-
cator (See note 2.)
11: Top plunger, adjustable
12: Flexible rod, spring wire
14: Flexible rod, plastic rod
15: Flexible rod, cat whisker
16: Flexible rod, coil spring
L:
DPDT, double-break, simultaneous operation, neon lamp
DPDT, double-break, simultaneous operation, LED
P:
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