EPRAD LCS User manual
LCS & LDP
LED Light Dimming System
Manual
Version 1.4 Nov 19, 2020
EPRAD Incorporated
28271 Cedar Park Blvd
Perrysburg, O 43551 USA
P : 419-666-3266
Warranty
Light dimmer products, sold by EPRAD Incorporated, are warranted against defects in materials and
workmanship for one year from the date of purchase. There are no other express or implied
warranties and no warranty of merchantability or fitness for a particular purpose.
During the warranty period, EPRAD Incorporated will repair or, at its option, replace components that
prove to be defective, provided the unit is shipped prepaid to the manufacturer directly or via an
authorized distributor. Not covered by this warranty are defects caused by modification, misuse or
accidents and any further damage caused by inadequate packing for service return.
EPRAD Incorporated’s obligation is restricted to the repair or replacement of defective parts and
under no circumstances will EPRAD Incorporated be liable for any other damage, either direct or
consequential.
Trademark Notice
All trademarks referenced in this document and in the product software are the sole property of their
respective owners. EPRAD Incorporated is in no way affiliated with the owners of the trademarks. The
information contained in this document is provided by EPRAD solely to assist the users of EPRAD
products in interfacing with third party cinema equipment. EPRAD assumes no responsibility for any
discrepancies or inaccuracies in the information provided in this document as third party products are
beyond the control of EPRAD Incorporated.
Information in this document is subject to change without notice. No part of this document may be
reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose,
without the express written permission of EPRAD Incorporated.
© 2020 EPRAD INC. All right re erved.
EPRAD Incorporated LED Light Dimming System PATENT PENDING
When using electrical equipment, basic safety precautions should always be followed
including the following:
READ AND FOLLOW ALL SAFETY INSTRUCTIONS
1. Do not use outdoors.
2. Do not mount near gas or electric heaters.
3. Equipment should be mounted in locations and heights where it will not readily
be subjected to tampering by unauthorized personnel.
4. The use of accessory equipment not recommended by the manufacturer may
cause an unsafe condition.
5. Do not use this equipment for other than intended use.
6. Refer service to qualified personnel.
SAVE THESE INSTRUCTIONS
WARNING: You must have access to a main circuit breaker or other power
disconnect device before installing any wiring. Installing the device with power on
may expose you to dangerous voltage and damage the device. A qualified
electrician must perform this installation.
WARNING: If replacing the fuse in this unit, you must replace fuse with exact
same type and rating.
WARNING: Refer to National Electrical Code® and local codes for cable
specifications. Failure to use proper cable can result in damage to equipment or
danger to persons.
WARNING: This equipment is intended for installation in accordance with the
National Electric Code® and local regulations. It is also intended for permanent
installation in indoor applications only. Before any electrical work is performed,
disconnect power at the circuit breaker or remove the fuse to avoid shock or
damage to the control. It is recommended that a qualified electrician perform this
installation.
CAUTION: Wire openings must have fittings or lining to protect wires/cables
from damage. Use 90° C copper wire only.
IMPORTANT SAFEGUARDS
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EPRAD Incorporated LED Light Dimming System PATENT PENDING
Safety and Regulatory Approval
Complies with the following regulatory standards for product safety and emergency lighting:
• Industrial Control Equipment [UL 508:2018 Ed.18]
• Industrial Control Equipment [CSA C22.2#14:2018 Ed.13]
• Standard For Emergency Lighting And Power Equipment [UL 924:2016 Ed.10+R:08Mar2017]
• Emergency Lighting Equipment [CSA C22.2#141:2015 Ed.5]
Safety Indication on the Product
This symbol is intended to alert the
operator that parts inside this
cabinet may involve risk of electric
shock.
This symbol is intended to alert the
operator to the presence of
important operating and servicing
instructions in technical
documentation for this equipment.
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EPRAD Incorporated LED Light Dimming System PATENT PENDING
Content
• Overview
• QDC-400 Dimmer Control Board
• LED Dimmer Power Module
• Emergency Lighting Operation (UL 924)
• In tallation
• Setup
• Manual Control Key
• U ing the LCS Dimmer with the eCNA Automation
• LED Lamp
• Serie Voltage Drop of Luminarie
• Model Number
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EPRAD Incorporated LED Light Dimming System PATENT PENDING
Overview
The LCS and LDP series LED light dimmers are designed to control EPRAD 36 Volt
LED lamps. They can be integrated with any cinema automation system to create
lighting effects in the auditorium. The standard unit is available as either a 1 or 2
channel configuration of either 200 or 320 watts per channel. The number of
channels can be expanded to 4 with the addition of the LDP LED dimmer expansion
unit. Each channel can be configured for any light zone with independent levels and
fade times. EPRAD LED lamps are standard profile with a medium screw-in base in
order to utilize existing lamps fixtures.
LSC LED Dimmer LDP LED Dimmer
The LCS dimmer consists of the QDC-400 control board and one or two LDD-36V
LED power modules.
The LDP LED dimmer cabinet is available in three base models with one or two
LDD-36V LED power modules:
• The LDP Expansion unit is used to expand the number of channels to the LCS
dimmer.
• The LDP Conversion unit can be used with existing phase-cut dimmers to
provide compatibility with EPRAD LED lamps.
• The LDP DC Control unit can be used with existing 0-10V dimmer controllers to
provide compatibility with EPRAD LED lamps.
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EPRAD Incorporated LED Light Dimming System PATENT PENDING
LCS Internals
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EPRAD Incorporated LED Light Dimming System PATENT PENDING
LDP Internals
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EPRAD Incorporated LED Light Dimming System PATENT PENDING
QDC-400 Dimmer Control Board
The QDC-400 is a four channel light dimmer controller. Light levels for each channel
are saved both locally and at the eCNA. Each level can be set from 0% to 100% in
1% increments. Each level has a Fade-In time that time controls how long it takes
the lights to ramp to a new level. The Fade-In time can be set from 0 to 99 seconds
with 1 second resolution. The channels can be independently configured for any of
sixteen zones. The LDD-36V LED dimmer module receives the level and fade time
from the QDC-400 control board to control EPRAD 36VDC LED lamps.
Note: The QDC-400 control board receives power from multiple sources: The LIN, the power modules
and the local power supply. The board can operate from any of these power sources, but only the
local power supply is large enough to power the level LEDs and LCD backlight.
1. DIP Switch Setting
DIP Switch Definitions
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EPRAD Incorporated LED Light Dimming System PATENT PENDING
S1 ON OFF
1 Force Boot Loader Normal Use (Default)
2 Stand Alone Mode eCNA Mode - Communicates with the eCNA
via LIN
3 Password Disabled Password Enabled (Default)
4 Triac gate is held on until just before
zero-cross
Triac gate is pulsed
5 ALL ON Input igh ALL ON Input Low
6 Not Defined
The eCNA Local I/O Network (LIN) can support up to 32 devices. Each of these devices requires a unique ID
number. IDs 13 through 16 are reserved for the QDC-400 control board. The ID must be set correctly. The ID
number determines which channel configuration or control record data the QDC-400 will use. ID switches are
ignored in Stand Alone mode.
S1 ID = 13
(Channels 1 - 4)
ID = 14
(Channels 5 - 8)
ID = 15
(Channels 9 - 12)
ID = 16
(Channels 13 - 16)
7 OFF OFF ON ON
8 OFF ON OFF ON
2. Statu LED
The RED Status LED on the QDC-400 control board indicates the following
conditions:
Statu LED
Statu Condition
Fast Blink The QDC-400 computer is working and is communicating properly with the
CNA.
1 Blink On,
Pause 2 seconds
The QDC-400 computer is waiting for data from the CNA, and the outputs
are disabled. This condition indicates that since a power up, the QDC-400
has not received data from the CNA. The lights are off and QDC-400 will
wait indefinitely for communications to be established.
2 Blinks On,
Pause 2 seconds
Communications Timeout, outputs are disabled. This condition indicates
that communications were once established to the CNA and subsequently
lost. The lights are off.
3 Blinks On,
Pause 2 seconds
Communications Timeout, outputs are held. This condition indicates that
communications were once established to the CNA and subsequently lost.
The lights hold their current output level. The local Stage and ouse
overrides will ramp outputs to the new level.
4 Blinks On,
Pause 2 seconds
Running BOOT LOADER program. The Boot loader program should only be
running if the ‘force bootloader’ switch is on or the a ‘Flash’ program
upgrade is in process.
5 Blinks On, Pause
2 seconds
The QDC-400 is running in ‘Stand Alone’ mode. DIP switch S1-2 is on.
3. Local Power LED
The GREEN Status LED indicates the local power supply is on.
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