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Last modified by Alexander Mott on 2024/01/05 18:55
From version 10.1
edited by Alexander Mott
on 2022/04/14 17:19
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edited by Alexander Mott
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8 8  (((
9 9  = Overview =
10 10  
11 -Phase dimming is one of the most common dimming methods for LED fixtures. The term "phase dimming" actually encompasses several dimming technologies which all operate on the same basic principal of chopping up the AC voltage being delivered to the fixtures or drivers.
11 +0-10V dimming is one of the most common dimming methods for LED fixtures. It utilizes a 0-10VDC signal from the lighting controller to the fixture power supply or driver in order to control the brightness of the fixtures. This 0-10VDC signal is typically carried over a shielded pair of gray (negative) and violet (positive) wires. In the event that 0-10V dimming fixtures are exhibiting unexpected dimming behavior, an easy place to begin troubleshooting is at the lighting control module.
12 12  
13 -Phase dimming can be broadly divided into two categories: forward phase dimming and reverse phase dimming. Forward phase dimming operates by cutting off the front (leading edge) of the AC sine wave, while reverse phase dimming cuts off the back (trailing edge) of the AC sine wave. See the //[[real world data>>WebHome||anchor="HRealWorldPhaseDimmingData"]]// below for an illustration.
14 -
15 -In the event that phase dimming fixtures are exhibiting unexpected dimming behavior, an easy place to begin troubleshooting is at the lighting control module.
16 -
17 17  = Verifying Module Output =
18 18  
19 19  Crestron produces a variety of 0-10V lighting controllers, and the specifics for troubleshooting them varies slightly. That being said, there is a general procedure for testing 0-10V dimming modules that is applicable to any type of 0-10V controller (even non-Crestron controllers). This general procedure is as follows:
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32 32  Below is a table of how to interpret troubleshooting results:
33 33  
34 34  |(% style="width:209px" %)**Result**|(% style="width:321px" %)**Interpretation**|(% style="width:453px" %)**Next Steps**
35 -|(% style="width:209px" %) |(% style="width:321px" %) |(% style="width:453px" %)(((
36 -
31 +|(% style="width:209px" %)Module produces the expected 0-10V DC output while fixtures are disconnected.|(% style="width:321px" %)Module is not defective. The issue is likely with 0-10V wiring in the field or with LED fixture drivers.|(% style="width:453px" %)(((
32 +Proceed to troubleshooting the fixture wiring and fixture compatibility.
37 37  )))
38 -|(% style="width:209px" %) |(% style="width:321px" %)(((
39 -
34 +|(% style="width:209px" %)Module does not produce a steady 0-10V signal while fixtures are disconnected.|(% style="width:321px" %)(((
35 +Module or control wiring may be defective.
40 40  )))|(% style="width:453px" %)(((
41 -
37 +Disconnect the lighting controller from the processor and repeat the 0-10V troubleshooting procedure in order to eliminate the possibility of programming being the issue.
42 42  
43 -
39 +* If the module still does not produce the expected output then it is defective and should be replaced.
40 +* If the module produces the correct output when disconnected from the processor, then the issue may lie with the programming or with the control wiring (Cresnet / Zūm wiring).
44 44  )))
45 45  
46 46  = Verifying Fixture Wiring and Compatibility =
47 47  
48 -== Troubleshooting Phase Dimming Wiring ==
45 +== Troubleshooting 0-10V Wiring ==
49 49  
50 50  There are a number of wiring and hardware issues that may result in fixtures not behaving as expected. Described below are some techniques that can help determine issues with wiring or hardware, however due to the wide variety of available fixtures and drivers it is not comprehensive.
51 51  
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68 68  Below is a table of how to interpret troubleshooting results:
69 69  
70 70  |(% style="width:273px" %)**Result**|(% style="width:317px" %)**Interpretation**|(% style="width:393px" %)**Next Steps**
71 -|(% style="width:273px" %) |(% style="width:317px" %) |(% style="width:393px" %)
72 -|(% style="width:273px" %) |(% style="width:317px" %) |(% style="width:393px" %)
73 -|(% style="width:273px" %) |(% style="width:317px" %) |(% style="width:393px" %)
68 +|(% style="width:273px" %)0-10V wiring to the fixtures reads -10V DC while fixtures are turned on and disconnected from the control module.|(% style="width:317px" %)Positive and negative 0-10V wiring is reversed in the field at all drivers.|(% style="width:393px" %)Reconnect the 0-10V wiring to the module output with reversed polarity (i.e. land violet wire to the field on the negative 0-10V output and land gray wire to the field on the positive 0-10V output) and check dimming again.
69 +|(% style="width:273px" %)Intentionally shorting the 0-10V wiring to the fixtures while they are turned on does not affect their brightness|(% style="width:317px" %)0-10V wiring to the field is likely already shorted.|(% style="width:393px" %)Find where the short is in the 0-10V wiring.
70 +|(% style="width:273px" %)(((
71 +When the 0-10V dimming wires are connected to the module, the module dims different fixtures than it toggles.
74 74  
73 +Or;
74 +
75 +Intentionally shorting the 0-10V wiring to the fixtures while they are turned on dims different fixtures.
76 +)))|(% style="width:317px" %)(((
77 +0-10V wiring zones are mixed up in the field (e.g. multiple zones have their 0-10V wiring tied together, or the 0-10V wiring for two zones got swapped)
78 +)))|(% style="width:393px" %)(((
79 +Determine whether the 0-10V wiring for the fixtures was simply landed at the incorrect output or if the wiring is incorrect in the field and then correct the wiring.
80 +
81 +
82 +)))
83 +
75 75  == Determine Fixture Compatibility ==
76 76  
77 77  (% class="wikigeneratedid" %)
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90 90  
91 91  The below sub-sections cover specific dimming procedures for various 0-10V controllers produced by Crestron.
92 92  
93 -== CLX-2DIMU8 and CLX-2DIMU8-277 ==
102 +== ZUMNET-JBOX-16A-LV and ZUMLINK-JBOX-16A-LV ==
94 94  
95 95  Zūm Wired JBOXs mount to a 1/2" knockout of a standard junction box.
96 96  
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100 100  
101 101  See //[[Figure 1>>WebHome||anchor="HFigure1"]]// for details.
102 102  
103 -== GL-EXP-DIMU-CN ==
112 +== CLX-2DIMFLV8 and CLX-2DIMFLV8-277 ==
104 104  
105 105  0-10V CLX modules are installed inside CAEN panels, which are typically located inside an electrical room or an MDF/IDF closet.
106 106  
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110 110  
111 111  See //[[Figure 2>>WebHome||anchor="HFigure2"]]// for details.
112 112  
113 -== DIN-1DIMU4 ==
122 +== GL-EXP-DIMFLV-CN ==
114 114  
115 115  GL-EXP-DIMFLV-CN are single-channel expansion modules used to provide additional 0-10V control to a system. They are self-contained and are surface mounted directly to a wall or ceiling.
116 116  
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120 120  
121 121  The ON/OFF button sits proud of the module cover, so care must be taken when replacing the cover to avoid damaging the button.
122 122  
132 +== GLPP-DIMFLVCN-PM, GLPP-1DIMFLV2CN-PM, and GLPP-1DIMFLV3CN-PM (Discontinued) ==
133 +
134 +GLPPs mount to two 4" junction boxes. The left junction box has low-voltage wiring for Cresnet and sensors, while the right junction box has high-voltage wiring to the fixtures.
135 +
136 +Inside the right junction box will be at least two flying leads for the 0-10V dimming output. The grey lead is for the negative output. Depending on the module, there will be one or more violet leads for the positive output. Each lead will be labeled "DIM OUT #" to indicate which output they correspond to. These leads should be wire nutted or lever nutted with the wiring to the fixtures. The leads should disconnected from the fixtures during troubleshooting.
137 +
138 +There are no manual controls on the GLPP that allow for dimming the output. GLPPs can only be dimmed through the lighting UI or with the use of a GLPPA-REMOTE-PROG programming remote. If using a remote to dim the outputs, the remote must have line of site with the IR receiver on the front of the GLPP. The GLPP remote has four columns of buttons; columns 1 through 3 contain separate ON/OFF, raise, and lower buttons for individual outputs. The fourth column contains these same buttons, but will control all outputs simultaneously.
139 +
140 +One common source of dimming issues with multi-channel GLPPs is mixing up the switched outputs and the dimming outputs; fixtures should have their 0-10V dimming connected to the dimming output associated with the switched output that controls them.
141 +
142 +== GLPAC-DIMFLV4 and GLPAC-DIMFLV8 (Discontinued) ==
143 +
144 +GLPAC modules are self contained and typically installed above the ceiling in the room they control.
145 +
146 +Each GLPAC module has either four or eight outputs depending on the model. Each output has its own line voltage input. Even if there are no loads on the first output, the GLPAC still requires a line voltage input in order to function. The line voltage input for subsequent outputs do not need to be on the same circuit as the line voltage input for the first output, but they must be on the same phase.
147 +
148 +On the front of the GLPAC are either four or eight buttons corresponding to each of the outputs. Next to each button is a green LED indicating the current load status. The LED will be lit if the output is on. The buttons can be used to toggle each channel independently, and holding the button will cycle dim the 0-10V output for that channel.
149 +
150 +The 0-10V outputs are located on the top right of the module. A small screwdriver is required to disconnect the dimming to the fixtures.
151 +
123 123  See //[[Figure 3>>WebHome||anchor="HFigure3"]]// for details.
124 124  
125 -= Real World Phase Dimming Data =
154 +== GLXP-DIMFLV8 (Discontinued) ==
126 126  
156 +0-10V GLXP modules are installed inside GLEP panels, which are typically located inside an electrical room or an MDF/IDF closet.
157 +
158 +Each GLXP-DIMFLV8 module has eight outputs, each with its own line voltage input. Even if there are no loads on the first output, the GLXP still requires a line voltage input in order to function. The line voltage input for subsequent outputs do not need to be on the same circuit as the line voltage input for the first output, but they must be on the same phase.
159 +
160 +On the front of GLXP modules are eight buttons corresponding to each of the eight outputs. Next to each button is a green LED indicating the current load status. The LED will be lit if the output is on. The buttons can be used to toggle each channel independently, and holding the button will cycle dim the 0-10V output for that channel. When dimming, the LCD "NET ID" screen will indicate the current expected brightness level.
161 +
162 +The 0-10V outputs are split into the eight negative outputs and the eight positive outputs on the lower left of the module. A small screwdriver is required to disconnect the dimming to the fixtures.
163 +
164 +See //[[Figure 4>>WebHome||anchor="HFigure4"]]// for details.
165 +
166 += Real World 0-10V Data =
167 +
127 127  Below is a table of actual 0-10V readings at various percentage brightness for some Crestron lighting controllers:
128 128  
129 129  |=Percentage Brightness|=GLPP-1DIMFLV2CN-PM Reading|=GLPAC-DIMFLV8 Reading|=GLXP-DIMFLV8 Reading
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158 158  [[[[image:glpac.png]]>>attach:glpac.png]]
159 159  //Figure 3: GLPAC-DIMFLV8 Overview [[(larger)>>https://wiki.chiefintegrations.com/download/SHOWRUNNER%E2%84%A2%20Setup%20Guide/Troubleshooting%20Guide/Wiring%20and%20Hardware/0-10V%20Dimming%20Troubleshooting/WebHome/glpac.png?rev=1.2]]//
160 160  )))
202 +
203 +(% class="wikigeneratedid" id="HFigure4" %)
204 +(((
205 +[[[[image:glxp.png]]>>attach:glxp.png]]
206 +//Figure 4: GLXP-DIMFLV8 Overview [[(larger)>>https://wiki.chiefintegrations.com/download/SHOWRUNNER%E2%84%A2%20Setup%20Guide/Troubleshooting%20Guide/Wiring%20and%20Hardware/0-10V%20Dimming%20Troubleshooting/WebHome/glxp.png?rev=1.1]]//
161 161  )))
162 162  )))
209 +)))
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