UE48-2OS2D2 datasheet(68/92 Pages) SICK

68 / 92 page

S e n S : c o n t r o l - S a f e c o n t r o l S o l u t I o n S | S I c K

8015528/2012-12-17

Subject to change without notice

Safety relays

Evaluation units for switching contacts

6 8

ue45-3S1

Internal circuitry

Channel 1 Channel 2

RESET

CONTROL- LOGIC

K 2

K 4

K 1

K 3

S31 S22

S12

S21

S11

A1 A2

13 23

14 24

S33 S34 S35

(–)

(+)

Function

After applying the supply voltage (LED SUPPLY illuminates), the

normally open contacts remain open. If the connected sensor

is not activated (i.e., the input circuits are closed), the normally

open contacts close immediately during automatic resetting;

LED K1/K2 and K3/K4 illuminate. In the case of manual reset-

ting, this only occurs after pressing and releasing the reset

button.

The activation of the sensor (opening of one or both input

circuits) affects the opening of both normally open contacts (13

- 14 / 23 - 24) immediately, and a time delayed opening of the

third circuit (37 - 38), with LED K1/K2 immediately going off

and K3/K4 going off later.

External device monitoring (EDM)

The unit can take over external device monitoring. The contac-

tor monitoring system monitors the external relays by way of

their normally closed contacts.

Manual reset

For manual reset, a pushbutton must be connected to termi-

nals S33 - S34. This reset is monitored.

Automatic reset

For automatic reset, S33 - S35 must be linked.

Cross-circuit detection

Cross-circuit is detected on dual-channel wired systems, if

these are wired with opposing polarity.

Monitoring of synchronization

Only if input 2 closes no later than 0.5 sec after input 1, do the

output circuits close. If input 2 closes before input 1, the syn-

chronization monitoring of will not be affected and the output

circuits will close. This monitoring only takes place in automatic

reset.

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