Operating instructions

Product description
Leuze electronic MSI-SR4 4
1 Product description
The MSI-SR4 E-STOP relay is used as a connecting element between Optoelectronic Protective Devices
of type 3 or 4 as well as a sequential device for 1- or -2-channel protective-door and E-STOP monitors and
the machine control.
1.1 System overview
• 1- or 2-channel E-STOP circuit
• Cross-circuit recognition
• Monitoring of external contactors in the button circuit
• Monitored start button (cross connections between the button contacts and earth faults in the button
circuit are detected.)
• Automatic and manual start
• 3 release circuits, 1 NC contact as auxiliary power circuit
• LED displays Power, K1 and K2, reset
• Operating voltage 24 V AC/DC
• Housing width, 22.5 mm
1.2 Application possibilities
• Single-channel E-STOP circuit, (up to category 2, EN ISO 13849-1: 2009)
• Two-channel E-STOP wiring with cross-circuit recognition (up to category 4, EN ISO 13849-1: 2009)
• Single-channel protective door monitoring (up to category 2, EN ISO 13849-1: 2009)
• Two-channel protective door monitoring (up to category 4, EN ISO 13849-1: 2009)
• Sequential circuit for Light Beam Safety Devices type 4 with relay- or semiconductor outputs
• Sequential circuit for Light Beam Safety Devices type 2 (two-channel, self-testing)