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Last modified by Alexander Mott on 2024/01/05 18:55
From version 15.1
edited by Alexander Mott
on 2022/03/31 14:20
Change comment: There is no comment for this version
To version 17.1
edited by Alexander Mott
on 2022/03/31 15:14
Change comment: There is no comment for this version

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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 -== Verifying Module Output ==
13 += Verifying Module Output =
14 14  
15 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  
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40 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 41  )))
42 42  
43 -== Verifying Fixture Wiring and Compatibility ==
43 += Verifying Fixture Wiring and Compatibility =
44 44  
45 +== Troubleshooting 0-10V Wiring ==
46 +
45 45  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.
46 46  
47 47  1. Identify the module and output that should be controlling the fixtures
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51 51  1*. Alternatively, some modules have physical buttons that can be used to toggle the output:
52 52  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.
53 53  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)
54 -1. Reconnect the 0-10V wiring to the fixtures
55 -1*. Verify that the positive and negative dimming wires are not crossed
56 +1. While the fixtures are turned off, verify that the voltage on the 0-10V wiring to the fixtures is close to 0 V
57 +1. While the fixtures are turned off, check the 0-10V wiring to the fixtures for shorts
58 +1. While the fixtures are turned on, verify that the voltage on the 0-10V wiring to the fixtures is close to +10 V DC
59 +1. While the fixtures are turned on, short the positive and negative dimming wires to the fixtures
60 +1*. Most drivers will dim to 50% brightness, though some fixtures will turn off
61 +1. Reconnect the 0-10V wiring to the fixtures to the module output
62 +1. Verify the module output voltage while the fixtures are connected
63 +1*. The module output should be similar to the module output while the fixtures are disconnected
56 56  
57 57  Below is a table of how to interpret troubleshooting results:
58 58  
59 -|(% style="width:209px" %)**Result**|(% style="width:321px" %)**Interpretation**|(% style="width:453px" %)**Next Steps**
60 -|(% style="width:209px" %) |(% style="width:321px" %) |(% style="width:453px" %)(((
61 -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.
67 +|(% style="width:273px" %)**Result**|(% style="width:317px" %)**Interpretation**|(% style="width:393px" %)**Next Steps**
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.
62 62  
63 -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).
73 +Or;
64 64  
65 -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.
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.
66 66  
67 -(((
68 68  
69 -
70 -
71 71  )))
72 -)))
73 -|(% style="width:209px" %) |(% style="width:321px" %)(((
74 -
75 -)))|(% style="width:453px" %)(((
76 -
77 77  
78 -
79 -)))
84 +(% class="wikigeneratedid" %)
85 +== Determine Fixture Compatibility ==
80 80  
81 -== Specific Crestron Modules ==
87 +(% class="wikigeneratedid" %)
88 +If the fixtures are misbehaving but the wiring has been verified correct, then there may be compatibility issues between the fixture, the driver, and the lighting controller.
82 82  
90 +(% class="wikigeneratedid" %)
91 +Crestron maintains a [[list of compatible drivers>>https://www.crestron.com/Support/Tools/Lighting/Lighting-Fixture-Compatibility-List]] on their website. Determine the fixture and driver that have been installed and verify they are compatible with the 0-10V lighting controller being used.
92 +
93 +(% class="wikigeneratedid" %)
94 +Verify that the LED drivers are actually 0-10V drivers and not phase dimming, non-dimming, DALI, or some other dimming drivers. If the drivers are not 0-10V control drivers, then it will not be possible to dim the fixtures using a 0-10V module unless the drivers are changed out for 0-10V drivers.
95 +
96 +(% class="wikigeneratedid" %)
97 +There are two types of 0-10V LED driver: constant current and constant voltage. Constant current drivers dim the LED fixtures by varying the voltage output to reduce power while keeping current constant. Constant voltage drivers dim the LED fixtures by rapidly pulsing a constant voltage output. If the incorrect type of driver is used to power the fixtures (e.g. a constant current driver used for fixtures which require constant voltage), then the fixtures will not dim correctly. Verify that the drivers used are compatible with the fixtures.
98 +
99 += Specific Crestron Modules =
100 +
83 83  The below sub-sections cover specific dimming procedures for various 0-10V controllers produced by Crestron.
84 84  
85 -=== ZUMNET-JBOX-16A-LV and ZUMLINK-JBOX-16A-LV ===
103 +== ZUMNET-JBOX-16A-LV and ZUMLINK-JBOX-16A-LV ==
86 86  
87 87  Zūm Wired JBOXs mount to a 1/2" knockout of a standard junction box.
88 88  
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92 92  
93 93  See //[[Figure 1>>WebHome||anchor="HFigure1"]]// for details.
94 94  
95 -=== CLX-2DIMFLV8 and CLX-2DIMFLV8-277 ===
113 +== CLX-2DIMFLV8 and CLX-2DIMFLV8-277 ==
96 96  
97 97  0-10V CLX modules are installed inside CAEN panels, which are typically located inside an electrical room or an MDF/IDF closet.
98 98  
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102 102  
103 103  See //[[Figure 2>>WebHome||anchor="HFigure2"]]// for details.
104 104  
105 -=== GL-EXP-DIMFLV-CN ===
123 +== GL-EXP-DIMFLV-CN ==
106 106  
107 107  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.
108 108  
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112 112  
113 113  The ON/OFF button sits proud of the module cover, so care must be taken when replacing the cover to avoid damaging the button.
114 114  
115 -=== GLPP-DIMFLVCN-PM, GLPP-1DIMFLV2CN-PM, and GLPP-1DIMFLV3CN-PM (Discontinued) ===
133 +== GLPP-DIMFLVCN-PM, GLPP-1DIMFLV2CN-PM, and GLPP-1DIMFLV3CN-PM (Discontinued) ==
116 116  
117 117  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.
118 118  
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122 122  
123 123  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.
124 124  
125 -=== GLPAC-DIMFLV4 and GLPAC-DIMFLV8 (Discontinued) ===
143 +== GLPAC-DIMFLV4 and GLPAC-DIMFLV8 (Discontinued) ==
126 126  
127 127  GLPAC modules are self contained and typically installed above the ceiling in the room they control.
128 128  
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134 134  
135 135  See //[[Figure 3>>WebHome||anchor="HFigure3"]]// for details.
136 136  
137 -=== GLXP-DIMFLV8 (Discontinued) ===
155 +== GLXP-DIMFLV8 (Discontinued) ==
138 138  
139 139  0-10V GLXP modules are installed inside GLEP panels, which are typically located inside an electrical room or an MDF/IDF closet.
140 140  
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146 146  
147 147  See //[[Figure 4>>WebHome||anchor="HFigure4"]]// for details.
148 148  
149 -== Real World 0-10V Data ==
167 += Real World 0-10V Data =
150 150  
151 151  Below is a table of actual 0-10V readings at various percentage brightness for some Crestron lighting controllers:
152 152