ABB DT1-IK Handbuch Seite 12

Entry of override (DT1-IK only)
Makes it possible to remotely set temporary waivers.
When a 230V voltage is applied using a non lighted push-button on
connector 8, the state of the time switch is reversed until the next program
step.
Locking
To prevent all undesirable actions, the keyboard of the time switch may be
locked using a key DT-LK or pressing the enter and keys for
7 seconds.
Unlocking is done in the same way.
Full product reset remains feasible when the keyboard is locked.
Dimensions
58
35.8
43.8
10