UE48-3OS2D2 datasheet(36/92 Pages) SICK

36 / 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

3 6

ue42-2Hd

Internal circuitry

A1 A2

Y1 Y2 Y11 Y12 Y14

13 23 31

Y21 Y22 Y24

Feedback

Channel 2

Channel 1

Control-Logic

Function

The UE42-2HD unit corresponds to EN 574 type III C. To release

the outputs, the two inputs (e.g., two-hand pushbuttons) must

be actuated within 0.5 sec.

After applying the supply voltage to terminals A1 - A2, the LED

SUPPLY illuminates to indicate that electrical power is present.

Pressing the two-hand pushbuttons S1 and S2 at the same

time (see connection diagrams) closes the two normally open

contacts. Releasing one of the buttons will cause the circuits to

open.

A renewed attempt to initiate starting is only possible if both

start buttons are set to their nominal start position (for two-

hand pushbuttons units: if both have been released) and the

normally closed contact is closed.

External device monitoring (EDM)

The UE42-2HD can take over the function of external device

monitoring. The normally closed contacts of the external relays

are switched in series and connected to terminals Y1 - Y2.

Automatic start

The UE42-2HD has an automatic start facility.

Monitoring of simultaneous activation

The pressing of the start buttons at the same time is moni-

tored. Only when both start buttons are activated within 0.5

sec do normally open contacts close and the normally closed

contact opens.

UE48-3OS2D2 bảng dữ liệu(PDF) 36 Page - SICK AG