Our Bulletin 855 Control Tower™ Stack Lights provide multi-status indication of your application. They are available in three sizes with UL Type 4/4X/13, IP65 ratings, to meet the most challenging panel and on-machine applications. We have a wide variety of light and sound functions, colors, voltages, and mounting options. We offer stack lights as separate light and sound modules or pre-assembled for greater flexibility.
Overview
- Available in 30 mm, 50 mm, and 70 mm sizes
- Steady and flashing status indicator light modules
- Continuous or pulsing piezo sound modules
- Stacking configurations 1…5 modules high
- Multiple mounting options
- Top-mounted terminal blocks on all bases
- DeviceNet bases available
Rockwell Automation announces that as of June 30, 2021, our Bulletin 855F 70 mm pre-assembled tower light will be discontinued and no longer available for sale.
To support your transition, we recommend migrating to our Bulletin 856T product line. The 856T product line is a functional replacement that offers new and modern LED technology and can control up to seven levels in the same stack arrangement. It also offers more flexible mounting options than our current 855F product line.
855T Transducer-style Sound Modules
Our sound modules are available in up to 15 tones, with adjustable volume, frequency, and speed. To hear an option, select any tone from the table below.
| Gong 1 | Gong 2 | Gong 3 | Changing (500 Hz) | Continuous (500 Hz) |
| Continuous (1500 Hz) | Emergency | Interrupted (500 Hz) | Interrupted (1500 Hz) | Ascending |
| Descending | Signal (100 Hz) | Sine Wave | Siren | Triangle |
Product Comparison
Compact Control Tower™ Lights |
Control Tower™ Lights |
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Bulletin |
855D |
855F |
855E |
855T |
Size |
30 mm |
70 mm |
50 mm |
70 mm |
Environmental Ratings |
UL Type 4/4X/13, IP65 |
UL Type 4/4X/13, IP65 |
UL Type 4/4X/13, IP65 on all bases, lights and caps sound modules |
UL Type 4/4X/13, IP65 on all bases, lights piezo-style sound and caps (sound and light with sound combo modules are IP54) |
Ease of Assembly, Base Wiring and Lamp Changes |
No assembly required - all towers are assembled, wired, and tested at the factory |
No assembly required - all towers are assembled, wired, and tested at the factory |
No-tools assembly and maintenance, “Twist-off” lenses for easy lamp changes, top-mounted terminal block for easy base wiring |
No-tools assembly and maintenance, “Twist-off” lenses for easy lamp changes, top-mounted terminal block for easy base wiring |
Illumination Types |
LED |
LED |
Incandescent, socket-mount LED, or strobe |
Incandescent, socket-mount LED, or strobe |
Lens Colors |
Green, red, amber, blue, yellow, clear |
Green, red, amber, blue, yellow, clear |
Green, red, amber, blue, yellow, clear |
Green, red, amber, blue, yellow, clear |
Pole-Mount Base Options |
Surface, 10 cm metric tube, and 25 cm metric tube |
Surface, 10 cm metric tube, and 25 cm metric tube |
10, 25, 40, 60, and 80 cm bases |
10, 25, 40, 60, and 80 cm – aluminum or stainless steel bases |
Other Base Mounting Options |
Vertical bracket, conduit adapter, and quick-release base |
Vertical bracket, conduit adapter, and quick-release base |
Surface-mount bases (surface-mount bases also feature 1/2 NPT, PG16, and M20 threading options), vertical-mount bases, and quick-release bases |
Surface-mount bases (surface-mount bases also feature 1/2 NPT, PG16, and M20 threading options) vertical-mount bases, and quick-release bases |
Housing Colors |
Black or grey base housing |
Black base housing |
Black or grey base housing |
Black or grey base housing |
Sound Options |
Piezo-style sound modules in single and two tone |
Piezo-style sound modules in single and two tone |
Piezo-style sound modules in single and two tone |
Transducer-style or piezo-style sound modules available in single or two tone (sound modules are UL Type 12, IP54), Piezo styles and modules also available in 4/4X |
Connectivity |
Standard connectivity |
Standard connectivity |
Standard connectivity |
Standard or DeviceNet connectivity |
Voltage Options |
Bases available in: 24V AC/DC, 120V AC, 240V AC as standard offerings |
Bases available in: 24V AC/DC, 120V AC, 240V AC as standard offerings |
All modules available in: 12V AC/DC, 24V AC/DC, 120V AC, 240V AC as standard offerings |
All modules available in: 12V AC/DC, 24V AC/DC, 120V AC, 240V AC as standard offerings |
Pole Connection Box |
– |
– |
Surface, vertical, and magnetic mount |
Surface, vertical, and magnetic mount |
Standards |
cULus Listed, CE |
cULus Listed, CE |
cULus Listed and CE on all components |
cULus Listed and CE on all components |
Operating Temperature |
-25…+50 °C |
-25…+60 °C |
-25…+50 °C |
-25…+70 °C |
Material |
Polycarbonate - bases, cap, lens cover, sound module housing, lens, & lamp socket |
Polycarbonate - bases, cap, lens cover, sound module housing, lens, & lamp socket |
Polycarbonate (no sound module) - bases, cap, lens cover, lens, & lamp socket |
Polycarbonate - bases, cap, lens cover, sound module housing, lens, & lamp socket |
Product Selection
Specifications
Certifications
- CE Marked (855T, 855E, and 855F only)
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cULus Listed — File No. E14840; Guide Nos. NKCR, NKCR7