Wattstopper

REV.
DESCRIPTION
1
EM-24A2
The EM-24A2 is a low voltage photocell used for operating exterior lighting.
It is used for signaling light levels to Watt Stopper lighting control panels
that are controlling exterior lighting.
•
Typically the EM-24A2 is mounted on the exterior or roof of a building
with the light level window facing north.
•
The EM-24A2’s 1/2" threaded male conduit base can be connected to
conduit fittings or to junction boxes with the supplied locknut.
•
Connect 24 VAC to the two black wires. Normally, this power is supplied
from the lighting control panel the photocell serves.
•
The relay contact red wires are connected to the lighting control panel
or to a low voltage controlled load.
Mount on exterior
or roof of building.
Point light sensing
window north.
Sliding window.
As it is moved up,
lights turn on earlier,
and turn off later.
1/2" thread fitting
Locknut
To 24 VAC
supply
BLK
BLK
RED
RED
N/O relay contacts
1A @30 VAC/VDC
(4) #18 AWG
LIGHTING
CONTROL
PANEL
Technical Support:
1(800)879-8585 1(972)578-1699
Drawn by:
MATERIAL:
Paper, white, glossy
80# Book
FLAT (cut) SIZE: 120mm W x 160mm H
FOLDING:
Quarter fold
INK COLOR:
Black
01052r1 4/00
HUCKABONE
PLM:
the
Watt Stopper Inc.
SANTA CLARA, CALIFORNIA
Title:
Project Engr:
EM-24A2 Installation Instructions
MarComm Dir:
Drawing #:
All information in this drawing is the property of The Watt Stopper Inc. and
cannot be copied or used without the written approval of The Watt Stopper Inc.
APPROVED
ECO# 032800-2
Exterior Photocell
Mounting
and Wiring
REV. DATE
Installation Instructions
Model#:
INT:
Sheet: 1 of 1
Scale: 1 : 1
01052
Original Drwg. Date:
3 APR 00
Rev #:
Rev. Date:
3 APR 00
1