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load, and compare it to the recorded load. Any change from recorded loads greater
than five percent shall display an error on the control module and any monitoring
device on the network.
G) Dimmer Specific messages shall include, but not be limited to, the following:
1. Load has dropped below recorded value
2. Load has raised above recorded value
3. DC detected on dimmer output
4. One SCR has failed on/off
5. Dimmer has failed off or circuit breaker has tripped
6. Dimmer has been removed
7. Dimmer load has failed
8. Dimmer has shut down due to over temperature
9. About Dimmer display shall provide additional information regarding the
dimmer’s recorded load and current or actual load.
H) Network Interface
(1) The Ethernet network shall provide an integral link to connect all racks in the system
for rack-to-rack, rack-to-console and rack-to-network device communication.
(2) The network interface to the control module shall provide a number of user-
programmable control logic schemes regulating the logical relationship between
control sources, including architectural control.
(3) A technician shall be able to program all parameters onsite, via the facepanel or using
a laptop personal computer. Systems that do not provide both types of user interface
shall not be acceptable. These parameters shall include, but not be limited to, defining
rack type, module type, scale voltage for each dimmer, firing mode, curve, dimmer
numbering and DMX512 or network port assignments. Systems requiring factory
programming shall not be acceptable.
I) Web-based Interface
(1) The control module shall incorporate web server technologies for interaction with
standard web browsers. The Web interface shall provide an easy-to-navigate,
graphical user interface for monitoring and control of the dimming systems. This
interface shall duplicate all the functions of the control module.
(2) The web-based interface shall be self-contained, requiring no software installation on a
user’s computer. A user may use any laptop with a web browser to configure and
exert basic control. A user shall be able to configure, monitor and control the dimming
system using a web browser such as Internet Explorer 6.0 or higher. Use of standard
web technologies shall also allow handheld computers, or PDA’s, to access and
control the system. Dimming systems that do not offer this facility shall not be
acceptable.
J) Physical
(1) The control electronics shall be contained in one plug-in module, housed in a formed
steel body with an injection-molded face panel, and self-retaining ejection handle to
ease removal from the rack.
(2) The control module shall operate on a universal voltage range of 90 – 250V, single- or
three-phase, 47 to 63 Hz. The control module shall automatically compensate for
frequency variations during operation.
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