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Electronic Theatre Controls Inc

Configuring the EM24

Screen Shot 2018-12-10 at 9.46.02 AM.png

Internal jumpers and the front panel thumbwheel allow you to configure several EM24 options and run self tests.A jumper consists of two or three vertical pins on the circuit board. A jumper is on when a clip (a small, rectangular piece of plastic) is placed over two of the pins, closing the circuit. It is off when the clip is removed.  

Note: Under normal operation, all EM24s in the racks in your system should have the same jumper settings, except for their starting addresses.

Data Fuses

Warning: Replace data fuses with type GMA-1/8 only

Setting starting address

Set the starting address for your EM24 on the front panel thumbwheel. Select the starting address from the chart below and set the thumbwheels to the corresponding number.
For analog mode, set the starting address to 99. If you need to make changes, write down your original settings for future reference.

Thumb Start Thumb Start Thumb Start Thumb Start Thumb Start Thumb Start
00 1 15 85 30 175 45 265 60 355 75 445
01 1 16 91 31 181 46 271 61 361 76 451
02 7 17 97 32 187 47 277 62 367 77 457
03 13 18 103 33 193 48 283 63 373 78 463
04 19 19 109 34 199 49 289 64 379 79 469
05 25 20 115 35 205 50 295 65 385 80 475
06 31 21 121 36 211 51 301 66 391 81 481
07 37 22 127 37 217 52 307 67 397 82 487
08 43 23 133 38 223 53 313 68 403 83 493
09 49 24 139 39 229 54 319 69 409 84 499
10 55 25 145 40 235 55 325 70 415 85 505
11 61 26 151 41 241 56 331 71 421 86 511
12 67 27 157 42 247 57 337 72 427    
13 73 28 163 43 253 58 343 73 433    
14 79 29 169 44 259 59 349 74 439    

Selecting incoming data type

The first two jumpers at location J5 on the circuit board (see diagram) determine the type of digital data which your EM24 will receive. After making any changes, press the [Reset] button and the EM24 will reconfigure to match your new settings.

Data format Jumper 1 Jumper 2
DMX512
AMX192 on
Micro II on
Preset control on on

Additionally, if you are using Colortran data, set the top pair of pins in the three-way jumper at location J4 to On. For all other formats, connect the bottom pair of pins. If you are receiving AMX192 data, set the top pair of pins in the three-way jumper at location J3 to On. For all other formats, or if you are running self tests, connect the bottom pair of pins. Use the Preset Control setting if your EM24 is in an L86 Wall Pack using wall mounted control stations.

Setting number of outputs

Set Jumper 3 at location J5 to Off to if you have twelve 2.4k or twenty four 1.2k dimmers. Set it to On to if you have six 6k dimmers.

Setting line frequency

Set Jumper 4 at location J5 to Off for 60 cycle frequency. Set it to On for 50 cycle frequency.

Setting Dimmer Phasing

The red slide switch at location S5 controls the phase setting for your EM24. If your pack is wired for three phase operation, set the switch to the right (front panel facing you). Set the switch to the left for single phase operation.

right = 3 phase 120/208 4-wire
left = 1 phase 120/240 3-wire

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