The ornamental design for a keypad for burglaralarms, as shown and described.
1. Keypad for burglar alarms
1.1 : Front
1.2 : Back
1.3 : Top
1.4 : Bottom
1.5 : Right
1.6 : Left
Reproduction 1.1 is a front view; reproduction 1.2 is a back view; reproduction 1.3 is a top view; reproduction 1.4 is a bottom view; reproduction 1.5 is a right view; reproduction 1.6 is a left view.