Crestron Green Light 277 Volt Specifications download pdf (Page 67)

Crestron Commercial Lighting Design Guide

Doc. 4775B | Crestron.com 63

Accessories

GLS-PLS

The GLS-PLS is a 3-phase power loss sensor designed for use with Crestron

Green Light systems to activate Override mode during a power failure. In

response to a signal from the GLS-PLS, the lighting system program can be

temporarily overridden while designated emergency lighting circuits are changed

to their override preset levels and unnecessary lighting and other devices are shut

down to minimize the demand on emergency power equipment.

The GLS-PLS senses each leg of a 120 or 277 Volt 3-phase feed, providing LED

indication of the status of each phase on its front panel. When power is lost on

any phase, the corresponding status LED turns off and a contact closure is

activated on each of two control outputs. Two isolated control outputs are

provided to allow for interfacing with third-party equipment in addition to the

Crestron lighting system. Each contact closure output is rated for 1A @ 24VDC.

Testing the GLS-PLS-120/277 is facilitated using three Test Switches located

behind a small cover plate on the front of the unit. Setting any switch to the TEST

position simulates a loss of power on the corresponding phase leg, providing a

test of the unit's internal circuitry and any connected equipment.

The steel enclosure is designed for mounting to a vertical surface. Conduit

knockouts are provided on the bottom, top, and both sides. All electrical

connections are made via screw terminals accessed by removing the front panel.

UL924

Underwriters Laboratories specifies safety standards for emergency lighting and

power equipment under UL924. The GLS-PLS power loss sensor will help satisfy

UL-924 requirements.

Control Protocol Interfaces for 3

Party Devices

GLA-BMS

The GLA-BMS is an Ethernet based "protocol translator" which allows a Crestron system to communicate directly

with any number of building management protocols. Programmable like any other Crestron Ethernet device, the

GLA-BMS makes it easy to interface with:

• BACnet/IP

• BACnet/MSTP (RS-485)

• Modbus TCP/IP

• Modbus RTU (RS-485)

• Lonworks

• Metasys N2 Open (Johnson Controls)

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 73 74

No comments

Crestron Green Light 277 Volt Specifications Page 67