LumaStream Trinity Power Cord User Manual
Page 12
Document: 66APPMAN-PC Rev: C
12 of 28
8.3 Output Voltage Dynamic Range
The Trinity PC has a dynamic voltage range options of 6 Vdc to 27 Vdc or
12 Vdc to 47 Vdc depending on configuration as referenced in table 6 at the
beginning of this manual. This allows the Trinity PC to accommodate a
range in both number of LEDs utilized in a string as well as a variation in
forward voltage drops. To determine the maximum voltage requirement for
any LED array configuration, the maximum voltage drops of the LEDs and
output cable/conductor voltage drops (when remote mounting the LED
load from the TRINITY PC) must be taken into consideration.
8.4 Number of LED’s Per-Channel Calculation Example.
How may 700mA LED’s can I hook up to a Trinity PC model 66-12-0700-
DMX-PC? The fixture needs to be mounted 150’ away from the driver.
First thing we need to know is the voltage drop of the LED. From the LED
datasheet we find that the maximum voltage drop of 1 LED is 3.5V(V
LED
).
From Table 6 at the beginning of this manual the 66-12-0700-DMX-PC, the
maximum output voltage per channel is 27V(V
MAX
). Dividing the LED voltage
into the maximum available voltage gives us:
So a maximum of 7 of these LED’s can be driven off of one channel.
Now the voltage drop of the cable has to be taken into account. To do that
we need to know how much headroom (V
HEADROOM
) we have with the num-
ber of LED’s and the maximum rating of the unit.
We have 2.5V of headroom with 7 of these LED connected. Now we need to
determine the voltage drop of the wiring. Using an online wire resistance
calculator we enter a length of 150ft and a current (Amps) of 0.7 (700mA),
giving us a voltage drop of 0.98V over a 18 AWG wire. We must multiply
this by 2 as there are 2 wires running to the LED (one positive wire, one
negative wire). So for a 18AWG cable at 150 feet, the total voltage drop is
1.96V. This is under our headroom limit, so 7 of these LED`s can be used per
channel with 18AWG wire.
This model Trinity PC has 12 channels (from table 6) so a total of 84 of these
LED`s can be driven by this Trinity PC.
71
.
7
5
.
3
27
NumberLEDs
V
V
NumberLEDs
V
V
NumberLEDs
LED
Max
V
V
V
V
V
NumberLEDs
V
V
V
Headroom
Headroom
LED
Max
Headroom
5
.
2
7
5
.
3
27
)
(
Document: 66APPMAN-PC Rev: C
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10.6 Output Channel Connections and DMX Address Mapping
DMX Address
Output
Channel
Belden/Alpha or
Equivalent Wire
Color/Polarity
Fixture #
Fixture
LED Color
Base Address (BA)
1
WHT + / BLK -
1
Blue
BA +1
2
RED
+ / BLK -
1
Red
BA+2
3
GREEN
+ / BLK -
1
Green
BA+3
4
WHT + / BLK -
2
Blue
BA+4
5
RED
+ / BLK -
2
Red
BA+5
6
GREEN
+ / BLK -
2
Green
BA+6
7
WHT + / BLK -
3
Blue
BA+7
8
RED
+ / BLK -
3
Red
BA+8
9
GREEN
+ / BLK -
3
Green
BA+9
10
WHT + / BLK -
4
Blue
BA +10
11
RED
+ / BLK -
4
Red
BA +11
12
GREEN
+ / BLK -
4
Green
The 3 position rotary switches sets the DMX address of the TRINITY
PC.
IMPORTANT: Each channel within the TRINITY PC requires a DMX
address. The rotary switch address identifies the Base Address
(BA), which is output channel ‘1’. Output channel 2 will be the next
address (BA+1) and so on up to output channel 12 (BA + 11).
The TRINITY PC will automatically detect a change in address in less
than 2 seconds. No recycling of the AC input is required to imple-
ment a change in address location.
In the case of daisy chained TRINITY PC modules, only the last mod-
ule in the chain is terminated by means of a 120 ohm +5%/-10% im-
pedance inserted into the DMX connector.
Zone Number
Output Channel
Belden/Alpha or Equivalent Wire
Color/Polarity
1
1
WHT + /
GREEN
-
1
2
RED
+ / BLK -
2
3
WHT + /
GREEN
-
2
4
RED
+ / BLK -
3
5
WHT + /
GREEN
-
3
6
RED
+ / BLK -