Westire 9400

DALI Dimming Photocells

Reduces power consumption to your specification, delivering cost and energy savings


The Westire 9400 Dali dimming photocell is designed to reduce power consumption. It’s Part-Night, On/Off & dimming schedules are programmed to your specification and additional power saving mode switches the LED driver off at 100% dim mode, extending the LED driver life.



Engineered in the EU with a 35 year design life and manufactured in-house using only high quality name brand components, the 8400 series photocells are renowned in the industry for their unparalleled quality and reliability.

Features & Benefits


  • Cost savings through reduced power consumption

  • Part-Night, On/Off & dimming schedules programmed to your specification

  • World’s most advanced A.I. Solar Time Clock Algorithms

  • DALI2 – D4i ANSI C136 compliant

  • Innovative overvoltage protection, protecting LED driver & light engine

  • Polycarbonate housing is ultrasonically bonded, UV stabilised and rated to IP68.

  • Upward facing units are designed to be self cleaning.

  • 100% product testing; 48 hour burn-in, electrical and final inspection.

  • Engineered, assembled & tested in our Irish manufacturing facility

  • World’s top brand electronic components and materials used
  • Delivering standalone dimming:
    – Factory Standard Dimming Schedule or
    – Customer Preference Dimming Schedule
  • Fits  all LED luminaires equipped with ANSI/NEMA 5 & 7 pin twist lock sockets
  • Dimming & controlling all types of outdoor street, road, security, amenity and campus lighting
  • Interfaces with all Dali D4i LED smart drivers
  • Wall mounting socket and bracket available

The upward facing daylight sensor has a full view of the open sky resulting in higher switching accuracy.


Dimensions86.3 mm Ø x 53.34 mm H
3.4” Ø x 2.1” H
Connection TypeNEMA 5/7 Pin
ANCI 136.10
Warranty10 years
Mains Supply85V - 305V AC
50/60 Hertz
Surge Protection320 Joule 12,000 Amps
Maximum Load Current (A)10 Amps
Photocell Power< 500mW
Operating Temperature-20° C to + 80° C
-4° F to + 176° F
Enclosure Protection RatingIP68 (Ultrasonically bonded)
Standards ComplianceANSI C136,
IS EN ISO 9001: 2015,
Environmental RoHS
CommunicationsDali D4i
Switching Ratio1:05 to 1:3 - Inverse ratios available
Dimming OptionsMultiple options from 1 - 100
Light Level Switching35 Lux On / 18 Lux Off as standard. Other levels available on request.
Time Reference Stabilization< 3 days
SwitchingRelay zero point micro controlled switching