6024924 datasheet(90/92 Pages) SICK

90 / 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

Contact expansions

9 0

ue11-4dX

connection diagram

A1 A2

27 37

55 65

28 38

56 66

Function

The supply voltage of the contact expansion module is triggered

by the standard unit’s output contact.

Upon applying the supply voltage to terminals A1 and A2, relays

K1 and K2 are energized (the LEDs for both relays illuminate):

The 4 output contacts close and the two normally closed

contacts and the EDM (feedback) circuit switch to open circuit

status.

When the output contacts of the standard unit open (e.g., by

activation of the emergency stop switch), the relays K1 and K2

de-energize after a unit specific delay. These fixed switch-off

delay times of 0.5 s, 1 s, 2 s and 3 s are according to the type.

This is achieved by means of capacitors to ensure that the off-

delay runs its full duration, even during power supply failures.

Only after the delay period has expired do the relays K1 and

K2 return to their neutral rest position. With the combination of

UE11-4DX (with off-delayed) and a standard unit, stop category

1 (EN 418) can be realized.

External device monitoring (EDM)

If external device monitoring is implemented in the upstream

installed standard unit, then the normally closed contacts (Y1

- Y2) prevent the standard unit from resetting, when K1 and/or

K2 do not de-energize.

6024924 Datasheet(PDF) 90 Page - SICK AG