8WD4420-5AB
AktiivneSiemens 8WD4420-5AB SIRIUS Signaling Column — Red Continuous Element (70mm, 24V)
Siemens 8WD44 modular signal column.
Tüüpilised rakendused
Siemens stack light for machine status indication. Modular — stack the colors you need. LED technology, 70mm diameter. Visible from 30+ meters in a factory. Integrates with Siemens S7 PLC via direct digital outputs.
Research Notes
1. Overview
The Siemens 8WD4420-5AB is a red continuous-light element for the SIRIUS 8WD44 signaling column (70mm tower/stack-light system) — an integrated-LED, steady (non-flashing) red module rated 24 V AC/DC. The 8WD44 platform is modular: a base + stackable colored light elements (and optional flashing/rotating/sounder modules) build a signaling tower; this part is a single red steady element within that system. It is a signaling/indicator device, not a pushbutton.
2. User Sentiment
SIRIUS 8WD signaling columns are a European industry standard, valued for modularity, integrated-LED reliability, and easy field assembly of the needed color/function stack. The main selection care is the 8WD44 catalog decoding — element type (continuous 8WD442x vs flashing/rotating/sounder), color (the trailing code), and voltage — plus matching the base and mount.
3. Real-World Applications
Machine/line status signaling (fault/stop = red), andon and process-alert towers on factory equipment and automation cells. Stacked with green/yellow/blue elements and optionally a buzzer to convey multi-state status across a plant floor.
4. Technical Specifications
- Type: 70mm signaling-column continuous (steady) LED light element; signaling device, not a button
- Color: Red (this element)
- Voltage: 24 V AC/DC, integrated LED
- Diameter: 70 mm (8WD44 system)
- Function: continuous light (8WD4420 = continuous; flashing/rotating/sounder are different suffixes)
- Approvals: UL, CE
- Series: Siemens SIRIUS 8WD44
5. Ordering & Compatibility
Modular — order the base (8WD4408-…), the color/function elements, terminal/mount, and optional sounder to build the tower. Other colors/functions use different 8WD442x/8WD442x codes; confirm color + voltage + function from the catalog number. Sold through Siemens/SIRIUS distributors (Mouser, DigiKey, etc.).
6. Known Issues
No notable reliability issues — mature integrated-LED signaling line. Gotcha: the model number encodes color/function/voltage, so verify this is the red, continuous, 24V element you need; it is a status indicator element, not a standalone tower or an operator control.
2 sources
- 8WD4420-5AB Signalling Column — continuous light, red, 24V AC/DC, 70mm — support.industry.siemens.com
- Siemens 8WD4420-5AB SIRIUS Signaling Column (red) — siemens.com
Spetsifikatsioonid
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Certifications
Third-party safety certifications. UL = required for US NEC installations. CE = EU compliance. CSA = Canadian standards.
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UL, CE
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Color
Button/actuator color. Green = start/go, Red = stop/emergency, Yellow = caution, Blue = reset (per IEC 60204-1).
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Red
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Diameter
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70mm
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Function
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Continuous (steady) light element
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Mounting Type
How the button attaches to the panel. Panel mount is standard — installs through a cutout from the front.
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Pole mount
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Voltage
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24V DC
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Paigalduse kiirjuhend
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.
Mõõtmed
Veaotsing
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.
Kust osta
Hinnavahemik
$52.03 — $240.07
3 edasimüüja juures
Kiirspetsifikatsioonid
- Certifications
- UL, CE
- Color
- Red
- Diameter
- 70mm
- Function
- Continuous (steady) light element
- Mounting Type
- Pole mount
Mida kasutajad ütlevad
“Siemens stack light for machine status indication. Modular — stack the colors you need. LED technology, 70mm diameter. Visible from 30+ meters in a factory. Integrates with Siemens S7 PLC via direct d”
