Dove Systems DM 1224 RM - Manual (Page 3)

F) CONTROL CONNECTIONS AND OVERTEMPERATURE SENSING
The Dimmermaster 1224 can take either of two control protocols: USITT
DMX-512 or 0 to +10VDC analog. DMX control input connections are made
through the five pin male XLR on the front of the unit. Analog 0 to +10VDC
control input connections are made through the DB15 male on the front of
the unit.
XLR DB15
DMX ANALOG
PIN 1 Common PIN 1 Channel 1 PIN 9 Channel 9
PIN 2 Data PIN 2 Channel 2 PIN 10 Channel10
PIN 3 Data PIN 3 Channel 3 PIN 11 Channel 11
PIN 4 -DataReturn PIN 4 Channel 4 PIN 12 Channel 12
PIN 5 +DataReturn PIN 5 Channel 5 PIN 13 +15V unregulated
PIN 6 Channel 6 PIN 14 -15V unregulated
PIN 7 Channel 7 PIN 15 Common
PIN 8 Channel 8
DMX pins 4 and 5 return the status of the dimmer to the controller. An option
on the dimmer sends the heat sink temperature and each of the line currents
back to the controller for display.
When the temperature of the heatsink exceeds 75 E Celsius, the control is cut
off. This prevents overheating. When the heatsink cools, the loads begin to
work again. If this happens, the air circulation around the dimmer should be
improved. Check that the internal fan has not failed. Note that the fan does
not opeate until the heatsink temperature exceeds 50
E Celsius.
G) CHANNEL SELECTION AND TESTING
The thumbwheel switch on the front of the unit is the channel selection switch.
The number shown is the starting dimmer. Valid starting dimmer numbers
range from 1 to 501. The starting dimmer number determines the setting for
the entire pack of twelve dimmers. If, for example, the starting dimmer number
is 37, the pack reads control signals for channels 37 through 48.
When the first digit of the thumbwheel switch reads "6", the pack is in load
testing mode. The second and third digits show the dimmer being tested,
from 1 to 12. The load test forces the output of the dimmer to full. This is
helpful for focusing and troubleshooting. (e.g. Which channel is that? Is the
lamp burnt out?) In addition, setting the thumbwheel switch to "600" powers all
loads at approximately 20%.
H) INDICATORS
The status indicator LED is used to check the Dimmermaster for proper
control and power connections. It shines amber or green when it is receiving
power and a valid DMX signal, and red when it is receiving power but a bad
signal. It also shines red when it is receiving an analog signal only. No light
at all means that it is not receiving power.
I) INTERNAL SWITCHES
A 9 position internal DIP switch sets various options. These include DMX
line termination and nondim operation. DIP switch functions are printed on
the circuit board.
To terminate the DMX line (this is the last dimmer in the DMX string), turn
on DIP switch number 1 (which terminates DMX pins 2 and 3) and 9 (which
terminates DMX pins 4 and 5).
All outputs at or above a specified number may be set to nondim. When
set to nondim, an output is full when fed with 50% (DMX level 128, analog
+5V). or higher. Below this threshold, the output is off. The first nondim output
is set using binary coding on the DIP switch. For example, if outputs 7 and
above are to be nondim, switches 2, 3, and 4 would be set to the on position,
since these correspond to nondim 1, nondim 2, and nondim 4. 1+2+4=7, so
outputs 7 and above will be nondim.
2. TROUBLESHOOTING CHART
SYMPTOM: No channels work; no lights at all.
Possible cause:
Action to take:
*Improper pinout on controller or cable wires Check pinout. Check