ABB/Niessen Key Switches Instruction Manual

This document is an instruction manual for ABB/Niessen key switches, covering 2-position and 3-position key commutators, as well as 2-position key push buttons (Refs. 8153, 8153.1, 8153.2, N2253 XX, N2253.1 XX, N2253.2 XX). It includes technical data (5A/125-250V AC, 150mA/250V AC-DC), mounting and connection schemes, key position contact activation tables, and warranty information in Spanish, Portuguese, and English.