Manual

ten pin header for DMX-512 input and output through the back-
plane.
The BR-MultiBrick32 will stop listening to the 'Smart' Brick net-
work whenever there is a DMX-512 signal present on this input.
The DMX-512 data lines on this connector will be attached to the
backplane DMX-512 header. This allows the DMX-512 signals to
be bussed between cards within a card cage.
The DMX-512 standard was developed by the United States In-
stitute for Theatrical Technology (USITT) for a high speed (250
KBaud) asynchronous serial data link. Although it was originally de-
signed for controlling light dimmers, it is now supported by hun-
dreds of suppliers throughout the world for controlling all kinds of
theatrical equipment.
Even though the DMX-512 standard calls for 512 channels of
data, the DMX transmission from PC•MACs is limited to 256 eight-
bit wide channels. You can address your DMX-512 compatible
output devices to respond to any address between 0 and 255.
Addresses above the 256th are used in PC•MACs for transmitting
a checksum. The BR-MultiBrick32 can use this to verify that the
data received from PC•MACs has no transmission errors in it. If
you address a light dimmer or other DMX-512 device to addresses
256 or 257, you will see this verification data displayed as a flick-
ering pattern. Note that at frame rates higher than forty FPS, not
all 256 channels can be transmitted through the DMX-512 out-
put.
The DMX-512 standard calls out a 5 pin XLR connector for all
cabling. Unfortunately these connectors won't fit on a 1” wide
card. For this reason we chose a 5 pin MiniDIN connector for this
signal. the pinout is as follows:
MiniDIN pin # SIGNAL
1
1 Signal Common (shield)
2 Dimmer Drive compliment (Rx Data -)
3 Dimmer Drive True (Rx Data +)
4 Data In True (Tx Data +)
5 Data In compliment (Tx Data -)
Facing the end of the male end of a cable, the pins are lo-
cated as shown:
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Don't blame us for these names. These are directly from the USITT.