schmersal 301SQ-230V Operating Instructions Manual Download Page 5

5

SRB 301SQ-230V

Operating instructions

Safety-monitoring module

EN

8.3  Sensor configuration

Dual-channel emergency stop circuit with command devices to 

DIN EN ISO 13850 (EN 418) and EN 60947-5-5 (Fig. 5)

•  Wire breakage and earth leakage in the control circuits are detected.

•  Cross-wire shorts between the control circuits are detected.

•  Category 4 – PL e to DIN EN ISO 13849-1 possible.

Dual-channel guard door monitoring circuit with interlocking 

device to EN 1088 (Fig. 6)

•  With at least one positive-break position switch

•  Wire breakage and earth leakage in the control circuits are detected.

•  Cross-wire shorts between the control circuits are detected.

•  Category 4 – PL e to DIN EN ISO 13849-1 possible.

S12

S11

S22

S21

S12

S11

S22

S21

Fig. 5

Fig. 6

8.4  Actuator configuration

Single-channel control with feedback circuit (Fig. 7)

•  Suitable for increase in capacity or number of contacts by means of 

contactors or relays with positive-guided contacts.

•  

S

 = feedback circuit:  

If the feedback circuit is not required, establish a bridge.

Dual-channel control with feedback circuit (Fig. 8)

•  Suitable for increase in capacity or number of contacts by means of 

contactors or relays with positive-guided contacts.

•  

S

 = feedback circuit:  

If the feedback circuit is not required, establish a bridge.

S12

X3

23

13

24

14

K

C

K

A

S

L1

N

K

A

K

C

S12

X3

23

13

24

14

K

B

K

C

K

D

K

A

K

B

L1

N

K

A

K

D

S

K

C

Fig. 7

Fig. 8

Differential control with feedback circuit (see Fig. 9)

•  Suitable for increase in capacity or number of contacts by means of 

contactors or relays with positive-guided contacts.

•  

S

 = feedback circuit:  

If the feedback circuit is not required, establish a bridge.

S12

X3

23

13

24

14

K

A

L1

N

K

A

S

a)

Fig. 9 a) Enabling signal controller

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