3SU1156-6AA20-1AA0
Active22mm Red LED Indicator 24V
Siemens SIRIUS ACT red LED indicator with metal front ring.
Common Applications
Red fault indicator for Siemens panels. Pairs with the green 3SU1156-6AA40-1BA0. Wire to PLC fault output. The metal front ring matches the premium SIRIUS ACT aesthetic.
Specifications
|
Certifications
Third-party safety certifications. UL = required for US NEC installations. CE = EU compliance. CSA = Canadian standards.
|
UL, CSA, CE
|
|
Color
Button/actuator color. Green = start/go, Red = stop/emergency, Yellow = caution, Blue = reset (per IEC 60204-1).
|
Red
|
|
Cutout Diameter
The hole size you drill in your panel to mount this button. 22mm is the most common industrial standard worldwide.
|
22mm
|
|
Illumination
Whether the button has a built-in light. Illuminated buttons show status (lit = active).
|
Illuminated
|
|
LED Voltage
The voltage required for the built-in LED. Must match your control circuit voltage (typically 24V DC or 230V AC).
|
24V AC/DC
|
|
Material
The bezel/body material. Metal bezels are more durable in harsh environments. Plastic is lighter and cheaper.
|
Metal front ring
|
Installation Quick Reference
Panel cutout: 22mm. Insert from the front, secure with mounting nut.
LED module: Check the voltage rating matches your supply (typically 24V DC or 230V AC). Connect to PLC digital output or relay contact for status indication.
Color meaning (IEC 60204-1): Green = normal/running. Red = fault/danger. Yellow = warning/caution. Blue = mandatory action. White = neutral/general.
Dimensions
Troubleshooting
Light is dim or flickering
Check supply voltage matches the LED module rating. Low voltage causes dimming. If voltage is correct, the LED module is failing — replace it. LED modules have finite life (typically 50K-100K hours).
Light doesn't turn on
Verify voltage at the terminals with a multimeter. Check the PLC output or relay driving the light. LED modules are polarity-sensitive on DC circuits — try reversing the leads.
Where to Buy
Price range
$38.7 — $40.62
across 2 distributors
Quick Specs
- Certifications
- UL, CSA, CE
- Color
- Red
- Cutout Diameter
- 22mm
- Illumination
- Illuminated
- LED Voltage
- 24V AC/DC
What People Are Saying
“Siemens 3SU1156-6AA20-1AA0 is a solid choice for indicator light applications. Standard specs, well-supported.”
