Safety Limit Switch Topic: Processing for Conduit Section and Recommended Connectors

FAQ No. FAQ02313

Question

What is the processing for the conduit section, and what are the recommended connectors for D4B-[]N Safety Limit Switch?

Answer

1. OMRON Applicable Connectors and Dimensions

Metal Connectors

Conduit

Applicable cable

Inner diameter (D)
of seal rubber

External diameter of cable

Model

Min.

Max.

JIS B 0202 G1/2

Cabtire cable
(general-purpose)

7 dia. mm

5.5 dia. mm

7.5 dia. mm

SC-1M

9 dia. mm

7.5 dia. mm

9.5 dia. mm

SC-2M

12.5 dia. mm

11 dia. mm

13 dia. mm

SC-3M

14 dia. mm

12 dia. mm

14 dia. mm

SC-4M

11 dia. mm

9 dia. mm

11 dia. mm

SC-5M

Cabtire cable
(anticorrosive)

7 dia. mm

5.5 dia. mm

7.5 dia. mm

SC-21

9 dia. mm

7.5 dia. mm

9.5 dia. mm

SC-22

12.5 dia. mm

11 dia. mm

13 dia. mm

SC-23

14 dia. mm

12 dia. mm

14 dia. mm

SC-24

11 dia. mm

9 dia. mm

11 dia. mm

SC-25

Refer to SC Limit Switch Connector for more details.

Metal Models with O-ring
G1/2
SC-1M to 5M

Dimensions

Metal Models without O-ring
G1/2
SC-21 to 25

Dimensions

Resin Connectors

Conduit	Applicable cable	Inner diameter (D) of seal rubber	External diameter of cable		Model
Conduit	Applicable cable	Inner diameter (D) of seal rubber	Min.	Max.	Model
JIS B 0202 G1/2	Cabtire cable	10.6 dia. mm	8.5 dia. mm	10.5 dia. mm	SC-P2
Pg13.5		9.6 dia. mm	7.5 dia. mm	9.5 dia. mm	SC-P3
JIS B 0202 G1/2		9 dia. mm	7.5 dia. mm	9 dia. mm	SC-6

Resin Models
G1/2
SC-P2

Dimensions

Resin Models
Pg13.5
SC-P3

Resin Models
G1/2
SC-6

Dimensions

2. Tighten the connectors to a torque of 1.77 to 2.16 Nm. (For conduits, use a tightening torque of 0.78 to 0.88 Nm.)
The case may be damaged if the connectors are tightened excessively.

3. If using a 1/2-14NPT conduit, apply sealing tape to the connector conduit opening to conform to IP67.

4. For 3-conduit connections, use the enclosed cap screws on the unused conduit openings and tighten to a torque of 1.27 to 1.67 Nm.

Other Safety Limit Switch FAQs

What is a form lock mechanism?

What is a snap action?

What is the difference between Safety Limit Switches and General-purpose Limit Switches?