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Electronic Theatre Controls Inc

Configuring the EM64

EM64 jumper locations
em64 jumper locations.png




Two Prong Jumper
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Use these jumpers to set starting address
J1 1234.png

Internal jumpers allow you to configure EM64 options and run self tests. A jumper consists of a pair of vertical pins on the circuit board. A jumper is On when a jumper clip (a small. rectangular piece of plastic with two sockets) is placed over both connectors, closing the circuit.  

It is Off when the clip is removed. Jumper locations are shown on the EM64 circuit panel diagram. Each jumper location is marked with a J.  

Note-Icon-new.png Note: Under normal operation. all EM64s in the racks in your system should have the same jumper settings, except for their starting addresses and module sizes.

Setting starting address

Jumpers 1 through 4 at location J1 set the starting address for the EM64. Select the starting address by setting the jumpers according to the chart below. The starting address and the dimmer number (as listed on your console) do not necessarily corre­ spond. If you need to make changes. write down your original jumper settings for future reference.

If your system has the optional front panel thumbwheel address switch. you can use it to select a starting address.

Note-Icon-new.png Note: All EM64s in a single chassis should have the same starting address.
Thumbwheel number Starting input Jumper 1 Jumper 2 Jumper 3 Jumper 4
1 1 - - - on
2 49 - - on -
3 97 - - on on
4 145 - on - -
5 193 - on - on
6 241 - on on -
7 289 - on on on
8 337 on - - -
9 385 on - - on
0 433 on - on -

Use Jumpers 6 and 7 to select dimmer module type
j1 module 6-7.png

Selecting dimmer module type

Set Jumpers 6 and 7 at location J1 to indicate the smallest dimmer installed in your chassis. For example, if the chassis contains both Bk and 1k dimmers. set the jumpers to the 1k setting.

Jumper 6 Jumper 7 Smallest dimmers on each module
- on 6k modules
on - 2k modules
on on 1k modules
- - used for testing only

Use Jumper 5 to set line regulationline regulations.png

Setting line regulation

Line regulation maintains lamp intensity at a constant level. even if power line voltage fluctuates. Set Jumper 5 at location J1 to Off to allow normal line regulation. Set it to On to disable line regulation.

Use Jumper 8 to set backup mode
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Setting backup mode (analog)

Some EM64s have the optional ability to accept analog input. If you have this option, set Jumper 8 at location J1 to Off to disable digital mode and select the backup (analog) mode. For normal digital input, this option is set to On.

Use Jumper 9 to enable Soft start
Soft Start.png

Enabling Soft start

Soft start is an option that adds a dynamic filter to reduce lamp shock, caused by turning a lamp on to full when the bulb is cold. Jumper 9 at location J1 enables the Soft start option when set to Off. Set Jumper 9 to On for normal operation.

Use Jumper 10 to enable Self test
Self Test.png

Enabling Self test mode

The EM64 allows you to specify a number of built-in self tests. If you wish to run one of these self tests, set Jumper 10 at location J1 to On. The next time you restart the module or turn the system on, the EM64 will run the self test you require.

Use jumper at J7 to enable Preheat mode
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Enabling Preheat mode

In Preheat mode, the EM64 maintains all dimmers at a minimal level even when the dimmer is turned all the way down. This can prolong the life of your lamps by protecting the filaments. Please note that if your rack contains modules with indicators, the Preheat mode will make them glow at all times.

Jumper 1 at location J7 enables Preheat when set to On. Set the jumper to Off for normal operation.

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