DETAILED DESCRIPTION

Safety modules SMS20 and SMS31

The SMS20 and SMS31 safety modules are designed in Category 4, Performance Level e in accordance with the Machine Directive EN ISO 13849-1 to monitor and control safely the safety circuits in applications with emergency stops, safety gates, safety magnetic switches, safety limit switches and electromechanical interlocks.
They are also used to control safely the safety circuits of the lift car levelling and the lift pit inspection, in compliance with the Lifts Standards EN81-20 and EN81-50.

Specifications

• Pluggable terminal blocks: for Power supply, feedback signal, safety inputs and outputs
• LED indications: for power supply, input and output status
• NO safety outputs: 2 in SMS20, 3 in SMS31
• NC auxiliary output:1 in SMS31
• NO and NC outputs type: Voltage free contact output, relays
• Power supply: 24Vdc ± 10%; 24Vac -15%/+10%, 50÷60 Hz, Class 2
• Short circuit protection: internal PTC
• Protection grade: IP40 on frontal part of the housing, IP20 on the terminals
• Operating Temperature -25 to +60°C
• Weight: SMS20=209 gr and SMS31=239 gr