G-157

D4NL

Connections

Indicator

Internal Circuit Diagram

Circuit Connection Example

• Terminals 12 and 41 are connected internally and so connect termi-

nals 11 and 42 for safety-circuit input. (GS-ET-19)

• Connect terminals 21 and 22 and terminals 51 and 52 in series

when using as safety-circuit input (redundancy circuit for terminals

11 and 12 and terminals 41 and 42 above). Connect the terminals

individually when using as auxiliary-circuit input (e.g., terminals 21

and 22 for safety-door open/closed monitoring and terminals 51

and 52 for monitoring the lock status).

• In the connection example on the right, terminals 21 and 22 and

terminals 51 and 52 are used as auxiliary-circuit input.

• Direct opening contacts used as safety-circuit input are indicated

with the

mark. Terminals 11 and 12 and terminals 21 and 22

are direct opening contacts.

• Connect the indicators in parallel to the auxiliary circuits or termi-

nals E1 and E2.

If an indicator is connected in parallel to a direct opening contact,

when the indicator breaks, a short-circuit current will be generated,

possibly resulting in an installation malfunction.

• Do not switch standard loads for more than 2 circuits at the same

time. Otherwise, the level of insulation may decrease.

• The 24-VDC solenoid has polarity. Be sure to connect terminals

with the correct polarity.

D

R

R

LED

Z

10 to 115 VAC/VDC

Constant-current diode

42

11

21

33

E1 (+)

O1

O2

12

41

51

52

22

34

E2 (

−)

Indicator

(Orange)

Safety

circuit

Auxiliary

circuit

Auxiliary

circuit

Auxiliary

circuit

F502-EN2-04.book Seite 157 Dienstag, 26. Juli 2005 5:48 17