Download DD-8 Operating Manual

JANDS DD-8
O p t o - I s o l a t e d
D M X
S p l i t t e r
Operating Manual
Version 2.0
JANDS DD-8 DMX SPLITTER
EMC COMPLIANCE
This product is approved for use in Europe and Australia/New Zealand and conforms to the following standards:
European Norms
Australian / New Zealand
Standards
EN 50081-1
AS/NZS 4252.1
EN 50082-1
AS/NZS 4251.1
EN 60335-1
AS/NZS 3350.1
To ensure continued compliance with EMC Directive 89/336 and the Australian Radiocommunications Act 1992, use
only high quality data cables with continuous shield, and connectors with conductive backshells. Examples of such
cables are:
DMX:

Belden 8102
100% Aluminium foil screen, 65% Copper braid.
JANDS ELECTRONICS PTY LTD 1997
All rights reserved
DISCLAIMER
Information contained in this manual is subject to change without notice and does not represent a
commitment on the part of the vendor. JANDS ELECTRONICS P/L shall not be liable for any loss or
damage whatsoever arising from the use of information or any error contained in this manual.
It is recommended that all service and repairs on this product be carried out by JANDS
ELECTRONICS P/L or it’s authorised service agents.
JANDS lighting products must only be used for the purpose they were intended by the manufacturer
and in conjunction with the user manual.
JANDS ELECTRONICS P/L cannot accept any liability whatsoever for any loss or damage caused by
service, maintenance or repair by unauthorised personnel, or by use other than that intended by the
manufacturer.
Manufactured in Australia by:
JANDS ELECTRONICS PTY LTD
(40 KENT RD)
LOCKED BAG 15
MASCOT
NSW 1460
AUSTRALIA
ACN 001 187 837
PHONE:
+61-2-9582-0909
FAX:
+61-2-9582-0999
EMAIL:
Internet: [email protected]
Revision 2.0 - 5 July 1998
-2-
OPERATING MANUAL
JANDS DD-8 DMX SPLITTER
Table of Contents
Table of Contents .................................................................................... 3
1.0 Introduction........................................................................................ 4
2.0 Equipment Description ..................................................................... 5
2.1 Physical layout ................................................................................................................ 5
3.0 Getting Started .................................................................................. 6
3.1 Setting the input voltage.................................................................................................. 6
3.2 Connecting power ........................................................................................................... 6
3.3 Connecting DMX-512 input ............................................................................................ 6
3.4 Connecting DMX-512 outputs ........................................................................................ 6
3.5 Power-up sequence ......................................................................................................... 6
4.0 Operating Notes ................................................................................ 7
5.0 Technical Aspects ............................................................................. 8
5.1 Circuit Description .......................................................................................................... 8
5.2 Fault Finding Table........................................................................................................11
5.3 Miscellaneous Notes.......................................................................................................11
6.0 Installation.......................................................................................... 12
7.0 Maintenance....................................................................................... 12
8.0 Technical Specifications................................................................... 13
Appendix A Connector Pinouts ............................................................ 14
Revision 2.0 - 5 July 1998
-3-
OPERATING MANUAL
JANDS DD-8 DMX SPLITTER
1.0 Introduction
The JANDS DD-8 is a high quality 8 channel opto-isolating data splitter specifically
designed for distributing one DMX-512 input signal to eight destinations. It is designed
to perform two functions - to isolate faults, and to provide signal amplification where
long cable runs are used.
When a fault occurs, it is possible to get high voltages in the DMX cabling. Such
voltages can propagate along the cable and damage all equipment connected to that
cable. The DD-8 is designed to sever the physical link between elements of the DMX
system, thereby isolating faults on one line from the rest of the system. The DD-8 is fully
protected against internal damage from most such faults. Since these faults can occur in
all systems, the DD-8 is equally suitable for all touring, theatre, exhibition and trade
show applications. In addition, including the DD-8 in a DMX system makes fault finding
relatively simple.
The DD-8 can also be used as a signal amplifier where extremely long cable runs are
necessary, or can be used to drive more than the normal maximum of 32 devices from a
console. It is recommended a DD-8 be used to isolate DMX segments that run to
equipment that is powered from different supplies. Outdoor systems where the console
runs from a separate supply to the dimmers are an example of such systems.
The DD-8 is designed to run from most mains power systems. It will accept an input
voltage from 90 to 130V, or 190 to 265V. The input voltage is set by the user at the
back panel.
The DD-8 is packaged in an all-steel enclosure and is designed to mount in a standard 19
inch rack. The DD-8 occupies one rack space.
Revision 2.0 - 5 July 1998
-4-
OPERATING MANUAL
JANDS DD-8 DMX SPLITTER
2.0 Equipment Description
1
2
4
FRONT PANEL
3
5
BACK PANEL
2.1
6
Physical layout
1. DMX Input: A standard 5 pin male AXR connector for DMX-512 signal input.
2. DMX LED: This indicator shows the presence of DMX signal.
3. Power LED: This indicator shows when mains power is applied to the DD-8.
4. DMX Outputs: A standard 5 pin AXR connector outputs opto-isolated DMX-512
signal to the DMX-512 receivers. The same signal appears on all eight outputs.
5. Power input: An IEC type inlet socket connects mains power to the DD-8.
6. Fuse: The position of the fuse holder selects the mains input voltage. Refer to Section
3 for details on setting the correct mains input voltage.
Revision 2.0 - 5 July 1998
-5-
OPERATING MANUAL
JANDS DD-8 DMX SPLITTER
3.0 Getting Started
3.1
Setting the input voltage
Before applying any power it is important that the DD-8 be configured to match the
incoming mains voltage. The fuse holder is marked with both “240V” and “110V”
markings - the label that is the correct way up indicates which input voltage is selected.
To change the input voltage, lever out the fuse holder with a flat blade screw driver and
rotate it 180 degrees. Swap the fuses and re-insert the fuse holder.
Note that the fuse holder is permanently attached to the socket assembly and can
only be removed about 20mm.
Note also that the rating of the fuse must be changed to match the input voltage.
Refer to the specifications for the correct fuse rating.
3.2
Connecting power
Connect a standard IEC plug and cable to the DD-8 inlet socket. When power is applied
the red POWER LED will light.
NOTE
The DD-8 must be connected to a 3 pin earthed power source. Use of 2 pin (nonearthed) power sources will reduce the ability of the DD-8 to protect against high
voltage shield faults.
3.3
Connecting DMX-512 input
The DD-8 input signal should conform to the USITT DMX-512 (1990) specification.
The DMX-512 input connects to the INPUT socket on the front panel. The green DMX
LED will light if there is signal present. See Appendix A for connector wiring details.
3.4
Connecting DMX-512 outputs
The DD-8 output signals are an amplified copy of the input signal. Connect the outputs
to the DMX-512 receiving devices as required. See Appendix A for connector wiring
details.
3.5
Power-up sequence
When powering up, a system should be powered up in the order it appears in the DMX512 system, starting from the console and proceeding to any splitters or softpatches, and
finally to the dimmers or fixtures. The DD-8 should be powered up in its appropriate
position in the system.
This procedure minimises the risk of producing the lighting equivalent of an audio
“thump” and prevents damage to lamps, dimmers, and other controlled devices.
Use the reverse procedure when powering down.
Revision 2.0 - 5 July 1998
-6-
OPERATING MANUAL
JANDS DD-8 DMX SPLITTER
4.0 Operating Notes
A DD-8 should be connected where its fault protection/isolation or fan out capability can
be most effective. See Figure 4.1 below. Suggested positions include:
1. Between pieces of equipment that run from different power sources. Examples
of different power sources include:
• Stadium type shows where the dimmers are distributed in groups around the
stadium and each group is run from a local sub-board, transformer, or sub
station. In this case a separate DD-8 output should be used to drive separate
dimmer groups via individual cables. If this is not practical then a DD-8
should be placed at each dimmer group, to isolate that group.
• Outdoor shows where the console is run from a different power supply to the
dimmers. In this case the DD-8 should be placed just before the input to the
first receiving device on the line.
2. At the input to a multi-piece equipment rack. If it is necessary to have complete
protection and isolation in a system then each receiving device must be
connected to an individual DD-8 output. If 12 channel dimmers in racks of six
are used, then one DD-8 per rack could isolate all of the dimmer inputs, provide
an isolated output for the next rack’s DD-8, and still have one spare output.
3. To drive a DMX-512 control signal in multiple directions from a centre hub
point. A DD-8 mounted in a truss can be used to provide drive signals for
moving lights in separate segments of the truss.
DMX-512 CONTROLLED DEVICES
Fig. 4.1 Typical JANDS DD-8 system configuration
Revision 2.0 - 5 July 1998
-7-
OPERATING MANUAL
JANDS DD-8 DMX SPLITTER
5.0 Technical Aspects
5.1
Circuit Description
The DD-8 copies the incoming DMX-512 signal into eight identical opto-isolated
outputs. A separate power supply is provided for the input and each output to maintain
complete isolation. Refer to Figure 2.1 (over).
The input signal is received by a standard RS485 line receiver (IC1) via protection
components PTC1, PTC2, MOV1, MOV2. Note the input shield is lifted from chassis
via a parallel RC network R1, C1. R4 terminates the incoming DMX line.
The output of IC1 drives the opto-isolator LEDs. These LEDs are arranged in two series
strings of four, and are driven via 20mA current sink transistors Q2 and Q3. The use of
current sinks ensures power supply voltage fluctuations do not affect the opto drive
current.
The receiver output also drives the signal indicator LED L2 via positive edge detector
network C8, R26, R8, D3, transistor driver Q1, and pulse lengthener C5. This circuit will
respond to signals with high repetition rates, and may light in the presence of non DMX
signals.
Eight identical output circuits drive the DMX outputs. The opto-transistor and pull-up
resistor R9 etc drive the DMX line driver directly. The line driver output is protected by
PTC3, PTC4, MOV3, MOV4, etc. The output shields are tied hard to the DD-8 chassis.
The DD-8 uses a custom-wound toroidal power transformer with nine separate but
identical secondary windings. Each winding is used to provide an isolated linear power
supply for one of the output circuits or the input circuit. A polyswitch protects each
output from local overloads.
The primary of the transformer is wound with a combined 240/110V winding, and the
orientation of the mains fuse determines which winding is connected to the mains input.
Note that when the mains voltage is changed, a fuse with the correct rating must be used.
Revision 2.0 - 5 July 1998
-8-
OPERATING MANUAL
A
B
C
Sec 9
Pri
120v
PROTECTION
DC
SUPPLY
0v
LED
SIGNAL
LED
POWER
A
OPTO
ISOLATOR
POWER
INLET
T500mA
240V
T1A
120V
E
N
Sec 1
OUTPUT 1
PROTECTION
DC
SUPPLY
2
OPTO
ISOLATOR
1
4/ The eight DMX output shields (pin 1) are connected directly to chassis.
3/ The DMX input shield (pin 1) is floated from earth by a 47K 1W resistor and 47nF RF bypass capacitor.
2
2/ The DMX signal pins (pins 2 & 3) are protected against continuous differential and common-mode overvoltages of up to 250 volts
AC.
1/ Voltage selection is at rear fuseholder. Use M205 T500mA fuse for 220 - 240 volts, or M205 T1A fuse for 100 - 120 volts.
NOTES:
DMX
INPUT
TRANSFMR
120/240V
47nF
D
47K
1
240v
Sec 2
OUTPUT 2
PROTECTION
DC
SUPPLY
File:
PROTECTION
Number:
3
DD8BLOK0
BLOCK DIAGRAM
Date: 5-May-2000
Revision:G. HAINES
Sec 8
4
4
Sheet 1 of 2
Drawn By:
OUTPUT 8
PROTECTION
DC
SUPPLY
Jands Electronics P/L
40 Kent Rd
Mascot NSW 2020
Australia
Ph (02) 9582-0909
OPTO
ISOLATOR
DD8 ISOLATEDDMX SPLITTER
OUTPUT 3
H:\Lab\Dd8\Dd8blok0.sc1
Size: A4
Title
OPTO
ISOLATOR
Sec 3
DC
SUPPLY
3
A
B
C
D
A
B
C
D
1W
47K
R1
1
5pin
Male AXR
SH 1
- 2
+ 3
DMX
Input
AXR1
E
N
L
47nF
C1
MOV1
MOV2
2
7
PTC2
A870
6
1.5KE12CA
100R
R4
RXE030
P1
2
A870
PTC1
C6
100nF
9x9v
outputs
T1
1.5KE12CA
250mA
F1
Mains
Input
240/110
fuse switchable
1
IC1
75176
5
8
DB101
DB1
4
1
2
3
C3
Vin
2K2
R25
2K2
R3
100nF
C4
470uF 470uF
C2
1
LM7805CK
REG1
GND
3
3
3
10uF
C7
2
1nF
C8
BAV21
D2
BAV21
10K
R26
BC337
Q2
R6
33R
R7
33R
BAV21
D3
2K2
R8
BC337
4
OPTO2
Q3
RED
OPTO6
D1
R2
L2
C5
5
+5V
10uF
C11
2
2
3
6N137
OPTO1
7,8
5
6
1K5
R9
GREEN
SIGNAL
BC337
Q1
1K
10uF
3
4
1
2
IC2
5
8 75176
6
7
MOV4
1.5KE12CA
1.5KE12CA
File:
Size:
Number: dmxd3.sch
6
H:\Lab\Dd8\Dmxd3.sch
A3
DD8 DMX ISOLATOR
Title
7
Jands Electronics P/L
40 Kent Rd
Mascot NSW 2020
Australia
Revision: 3
Ph (02) 9582-0909
Date: 5-May-2000 Time: 10:52:32 Sheet 2 of 2
A870
PTC3
A870
PTC4
MOV3
REG2,3,4,5,6,7,8,9
DB2,3,4,5,6,7,8,9
OPTO1,2,3,4,5,6,7,8
IC2,3,4,5,6,7,8,9
7
Note: For models with serial numbers below D98xxx
OPTO1 thru 8 = 6N135. R9 thru R16 selected during test
for minimum skew (less than 200nsec).
100nF
Vin
C9
OPTO3
OPTO5
470uF
100nF
1
LM7805CK
REG2
x8 channels
R9,R10,R11,R12,R13,R14,R15,R16
C9,C13,C17,C21,C25,C29,C33,C37
C11,C15,C19,C23,C27,C31,C35,C39
C12,C16,C20,C24,C28,C32,C36,C40
C10,C14,C18,C22,C26,C30,C34,C38
MOV3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18
PTC3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18
P2,3,4,5,6,7,8,9
6
PWR
OPTO4
C12
C10
DB101
DB2
5
L1
1K
R5
OPTO7
OPTO8
+5V
RXE030
P2
T1A
4
GND
3
5pin AXR
FEMALE
8
1 SH
2 -
DMX
OUTPUT
AXR2
3 +
Drawn By:
8
A
B
C
D
JANDS DD-8 DMX SPLITTER
5.2
Fault Finding Table
Fault Symptom
Possible Cause
Remedy
No power indication
Blown Fuse
Replace fuse
Mains disconnected
Reconnect
Ambient temperature too high
Reduce ambient temperature
Input cable fault
Replace cable
DMX source fault
Repair source
Faulty output cabling
Replace cable
Faulty receiving equipment
Replace faulty receiver
Control channels incorrect
Check source patch settings
No DMX signal indication
No DMX output - One output
Check receiver address settings
No DMX output - All outputs
Ambient temperature too high
Reduce ambient temperature
Faulty DD-8 output
Swap cabling to another output
Faulty input cabling
Replace cable
DMX source fault
Repair source
Ambient temperature too high
Reduce ambient temperature
Control channels incorrect
Check source patch settings
Check receiver address settings
5.3
Miscellaneous Notes
• The protection circuitry will protect the DD-8 DMX line receiver/drivers
against damage from most faults. However it is possible that extremely high
fault voltages or spikes may damage the circuitry. If damage does occur it is
important to re-route or repair the DMX cables as appropriate before repowering the unit. Note that the protection circuitry may take up to a minute to
reset after a fault has occurred.
• The internal linear power supplies are protected from faults by polyswitches.
These devices become more sensitive to overload at elevated temperatures, and
when tripped the unit should be switched off to enable them to reset. Allow one
minute for these devices to reset once the power has been removed.
• The DD-8 must be connected to a 3-pin earthed power source. Use of two pin
power sources will reduce the ability of the DD-8 to protect against high
voltage shield faults.
Revision 2.0 - 5 July 1998
- 12 -
OPERATING MANUAL
JANDS DD-8 DMX SPLITTER
6.0 Installation
The DD-8 is designed for mounting in standard 19 inch equipment racks. Adequate
ventilation should be provided around the top of the chassis, however no blank spaces
are required above or below the DD-8 specifically for ventilation of this device. Note
that such spaces may be necessary to prevent the ambient temperature from rising above
the maximum if other heat producing devices are mounted in the same rack.
No rear mounting is necessary due to the low weight of the unit.
7.0 Maintenance
WARNING
DO NOT ALLOW THE ENTRY OF LIQUIDS OF ANY SORT INTO THE DD-8.
With care, the DD-8 will require little maintenance. If the lexan panels require cleaning,
wipe with a mild detergent on a damp soft cloth.
DO NOT spray liquids onto the panels.
DO NOT use solvents for cleaning the panels.
Revision 2.0 - 5 July 1998
- 13 -
OPERATING MANUAL
JANDS DD-8 DMX SPLITTER
8.0 Technical Specifications
JANDS DD-8 DMX SPLITTER
SPECIFICATIONS
Mains Supply:
90-130V AC, 190-265V AC, 47-53Hz, fully earthed
Fuse:
110V - 1A, 240V-0.5A , M205 delay type
Power consumption:
50VA maximum
Operating Temperature:
45°C maximum ambient
Inputs:
1
DMX Termination:
100 Ohm
Outputs:
8
Isolation - input to any output:
500VAC
Isolation - between outputs:
500VAC
Protection - between input pins:
250VAC
Protection - from input to earth:
250VAC
Protection - between output pins:
250VAC
Protection - from output to earth:
250VAC
Construction:
Zinc plated all-steel chassis
Dimensions:
D: 120mm
Weight:
3kg
Physical protection rating:
IP20
Rack mounting requirements:
1 x 19” rack space / standard spacing for mounting holes
W: 480mm
H: 44mm
No ventilation requirements
No blank spaces required between units
Power inlet at rear left (looking from front of unit)
Power access required to replace mains fuse
Revision 2.0 - 5 July 1998
- 14 -
OPERATING MANUAL
JANDS DD-8 DMX SPLITTER
Appendix A
Connector Pinouts
DMX connector pin-outs
5
PIN
No
CONNECTION
(DMX IN)
CONNECTION
(DMX OUTPUT)
1
RC NETWORK TO
CHASSIS
CHASSIS
2
IN-
OUT-
3
IN+
OUT+
4
NC
NC
5
NC
NC
1
4
3
2
OUTPUT DMX CONNECTOR
5
1
2
3
4
INPUT DMX CONNECTOR
X MANUAL ENDS WXW
Revision 2.0 - 5 July 1998
- 15 -
OPERATING MANUAL
JANDS DD-8 DMX SPLITTER
40 KENT RD
MASCOT NSW 2020
PH: +61-2-9582-0909
FAX: +61-2-9582-0999
email: [email protected]
Revision 2.0 - 5 July 1998
- 16 -
OPERATING MANUAL