µ-Processor controlled • Amplifier relay for photoelectric switches • Automatic or manual emitter power regulation • Multiplex system, master/slave 20 ms cycle • Self-diagnostic functions • Alignment help • Rated operational voltage: 24 VAC/DC, 115 VAC or 230 VAC • Output 8 A/250 VAC SPDT relay • LED indication: Automatic gain, output, level, emitter or receiver fault