Dual-Loop Photosensor

The GLA‑LDL‑PC‑0‑10 is a dual-loop photosensor that continually measures ambient light in order to achieve the optimal balance of natural and artificial lighting in an indoor space in daylight harvesting applications. By harnessing natural daylight from windows and skylights, electrical lighting can be dimmed, reducing energy usage while maintaining a consistent light level for a more efficient and comfortable work or living space.

In closed-loop type daylight harvesting applications, the GLA‑LDL‑PC‑0‑10 is installed on the ceiling directly above the primary work area. It measures all light within a 60° cone, which consists predominately of reflected light, acquiring the most natural approximation of perceived changes in ambient light levels.

In open-loop type daylight harvesting applications, the GLA‑LDL‑PC‑0‑10 is installed on the ceiling near a window or in the light well of a skylight, directed toward the incoming daylight and away from any electrical lighting fixtures. The system estimates the total amount of ambient lighting in the room according to the light level measured by the photocell.

The GLA‑LDL‑PC‑0‑10 includes hardware to facilitate flush or surface mounting to a drywall or drop-tile surface. Its simple 3-wire interface allows for direct connection to a Crestron® control system via a single Versiport I/O or analog input port, with 24 V power taken from the Cresnet® network control bus.1

Using an optional sensor integration module (GLS‑SIM or ZUMMESH‑JBOX‑SIM for a Zūm® J-Box, both sold separately), the GLA‑LDL‑PC‑0‑10 becomes a full-featured Cresnet device, streamlining the total lighting system. Cresnet provides a simple solution for configuring and wiring sensors as part of any complete Crestron system. The Cresnet bus is the communications backbone for many Crestron keypads, lighting controllers, shade motors, sensors, and other devices.

1. Cresnet communications requires a GLS‑SIM or ZUMMESH‑JBOX‑SIM (both are sold separately). Power may be taken from Cresnet bus regardless of interface method. Connects to a GLS‑SIM, ZUMMESH‑JBOX‑SIM, Versiport I/O, or Analog Input control port on any Crestron control system.
2. Recommended wire size: 18 AWG.

This product may be purchased from select authorized Crestron dealers and distributors. To find a dealer or distributor, please contact the Crestron sales representative for your area. A list of sales representatives is available online at www.crestron.com/How-To-Buy/Find-a-Representative or by calling 855‑263‑8754.

This product is covered under the Crestron standard limited warranty. Refer to www.crestron.com/warranty for full details.

The specific patents that cover Crestron products are listed online at patents.crestron.com.

Certain Crestron products contain open source software. For specific information, please visit www.crestron.com/opensource.

Crestron, the Crestron logo, Cresnet, and Zūm are either trademarks or registered trademarks of Crestron Electronics, Inc. in the United States and/or other countries. UL is either trademark or registered trademark of Underwriters Laboratories, Inc. in the United States and/or other countries. Other trademarks, registered trademarks, and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Crestron disclaims any proprietary interest in the marks and names of others. Crestron is not responsible for errors in typography or photography. Specifications are subject to change without notice. ©2020 Crestron Electronics, Inc.