Schneider Electric · Harmony XB4 Series

XB4-BVB6

Active
UL CSA CE

22mm Blue Pilot Light Complete XB4 24V

Part number: B - V
Schneider Electric Harmony XB4 Series Introduced circa 2003

Schneider XB4 complete blue pilot light.

Common Applications

Blue indicator for mandatory action. Complete unit with 24V LED. Completes the Schneider indicator range: green, red, yellow, blue, white.

Specifications

Certifications
UL, CSA, CE
Color
Blue
Cutout Diameter
22mm
Illumination
Illuminated
IP Rating
IP66
LED Voltage
24V AC/DC
Material
Metal

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

Front 22mm cutout panel hole diameter Side panel contact ~45mm depth

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

$60.74 — $101.57

across 2 distributors

Quick Specs

Certifications
UL, CSA, CE
Color
Blue
Cutout Diameter
22mm
Illumination
Illuminated
IP Rating
IP66

What People Are Saying

+

“Blue indicator for mandatory action. Complete unit with 24V LED. Completes the Schneider indicator range: green, red, yellow, blue, white.”

Reddit r/PLC 34 upvotes View thread →