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Last modified by Alexander Mott on 2024/01/05 18:55
From version 12.1
edited by Alexander Mott
on 2022/03/30 19:36
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To version 13.2
edited by Alexander Mott
on 2022/03/31 14:15
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10 10  
11 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 -== General Procedure ==
13 +== Verifying Module Output ==
14 14  
15 -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).
15 +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:
16 16  
17 -The general 0-10V troubleshooting procedure is as follows:
18 -
19 19  1. Identify the module and output that should be dimming the fixtures
20 20  1. Disconnect the 0-10V wiring to the fixtures
21 21  1. Connect a multimeter to the 0-10V dimming output of the module
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24 24  1*. Alternatively, some modules have physical buttons that can be used to adjust their brightness:
25 25  1**. Press the button to toggle the output on or off. A small LED light on the module will indicate current output on/off status.
26 26  1**. Once the output is on, press and hold the button to cycle dim the output (first press and hold will lower the output, subsequent press and holds will toggle between raising and lowering the output)
25 +1. The 0-10V output should roughly correspond to the percentage brightness, e.g. a 60% bright output should be approximately 6V DC
26 +1*. Chief Integrations has recorded actual 0-10V outputs for a few different Crestron modules, available at the bottom of this article.
27 27  
28 28  Below is a table of how to interpret troubleshooting results:
29 29  
30 30  |(% style="width:209px" %)**Result**|(% style="width:321px" %)**Interpretation**|(% style="width:453px" %)**Next Steps**
31 -|(% style="width:209px" %)Module produced the expected 0-10V DC output|(% 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" %)(((
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.
33 +)))
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.
36 +)))|(% style="width:453px" %)(((
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.
38 +
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).
41 +)))
42 +
43 +== Verifying Fixture Wiring and Compatibility ==
44 +
45 +There
46 +
47 +1. Reconnect the 0-10V wiring to the fixtures
48 +1*. Verify that the positive and negative dimming wires are not crossed
49 +
50 +Below is a table of how to interpret troubleshooting results:
51 +
52 +|(% style="width:209px" %)**Result**|(% style="width:321px" %)**Interpretation**|(% style="width:453px" %)**Next Steps**
53 +|(% style="width:209px" %) |(% style="width:321px" %) |(% style="width:453px" %)(((
32 32  Verify that the 0-10V wiring in the field is not shorted. Try shorting the 0-10V wiring to the fixtures and observe the result. The fixtures should dim to about 50% brightness.
33 33  
34 34  Verify that the 0-10V wiring is correct at the fixture drivers (e.g. that the positive and negative wires did not get mixed up).
35 35  
36 36  Verify that the fixture drivers are actually 0-10V drivers; if the drivers are DALI or some proprietary dimming protocol, then they are not compatible with 0-10V lighting controllers. Either the drivers will need to be replaced or the lighting control system will need to be replaced.
59 +
60 +(((
61 +
62 +
63 +
37 37  )))
38 -|(% style="width:209px" %)Module did not produce a steady 0-10V signal|(% style="width:321px" %)(((
39 -Module or control wiring may be defective.
65 +)))
66 +|(% style="width:209px" %) |(% style="width:321px" %)(((
67 +
40 40  )))|(% style="width:453px" %)(((
41 -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.
69 +
42 42  
43 -* If the module still does not produce the expected output then it is defective and should be replaced.
44 -* 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).
71 +
45 45  )))
46 46  
47 -== Specific Modules ==
74 +== Specific Crestron Modules ==
48 48  
49 49  The below sub-sections cover specific dimming procedures for various 0-10V controllers produced by Crestron.
50 50  
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111 111  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.
112 112  
113 113  See //[[Figure 4>>WebHome||anchor="HFigure4"]]// for details.
141 +
142 +== Real World 0-10V Data ==
143 +
144 +Below is a table of actual 0-10V readings at various percentage brightness for some Crestron lighting controllers:
145 +
146 +|=Percentage Brightness|=GLPP-1DIMFLV2CN-PM Reading|=GLPAC-DIMFLV8 Reading|=GLXP-DIMFLV8 Reading
147 +|100%|9.94 V|10.03 V|10.00 V
148 +|80%|8.02 V|8.09 V|8.08 V
149 +|60%|5.96 V|6.13 V|6.11 V
150 +|50%|4.98 V|5.10 V|5.04 V
151 +|40%|4.01 V|4.06 V|4.02 V
152 +|20%|1.98 V|2.09 V|2.06 V
153 +|0%|27.1 mV|33.2 mV|25.4 mV
154 +
155 +
114 114  )))
115 115  
116 116