Device description
Leuze electronic GmbH + Co. KG
MSI-SR4B
9
3.1
Device overview
• 1- or 2-channel E-Stop circuit
• Cross-circuit detection
• 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
• Removable connection terminal blocks (screw terminals, spring-cage terminals)
3.2
Display elements
The display elements of the safety relay simplify start-up and fault analysis.
1
"Supply" LED
2
"K1" LED
3
"K2" LED
4
"Reset" LED
Figure 3.4: Display elements of the MSI-SR4B
Table 3.1:
Meaning of the LEDs
1
2
3
4
LED
Color
Description
Supply
Green
Supply voltage on
K1
Green
Relay K1 picked up
K2
Green
Relay K2 picked up
Reset
Yellow
Restart interlock locked