pathway 4802 Installer's Manual

Cable Test Feature cont.
INPUT TEST
INDICATIONS
D - ON Data present on
D + ON incoming DMX line
D - OFF D- signal missing
or shorted to common
D + ON
D - ON D+ signal missing
or shorted to common
D + OFF
D - OFF No data present on incoming
D + OFF DMX line
via the input connection, as per the previ-
ous instructions. Once that is verified, dis-
connect the cable to the suspect output
channel and depress the corresponding
ISO OUT TEST button. If both the corre-
sponding D- and D+ LEDs illuminate, this
shows that the isolated output circuitry
inside the repeater is working properly and
is transmitting both DMX512 signals. If
not, there is likely a problem with the out-
put circuitry for that channel. Try using the
spare transceiver chip to remedy the prob-
lem. Now reconnect the cable to the sus-
pect output and perform the same test. If
both of the D- and D+ LEDs illuminate, this
shows that there are no shorts in the out-
put cabling or connected receiving de-
vices. If one or both of the LEDs is off or
dim, a cable or device problem is indi-
cated. NOTE: if an output TEST button is
pushed when a proper input signal is not
being received by the Installation Re-
peater, the outputs will be in their normal
"idle" state (i.e. D- low level, D+ high
level), therefore the D+ LED will illuminate
and the D- LED will not.
Printed in Canada R8 Subject to change without notice
4802 Installation Repeater
6-way opto-isolated DMX splitter
DMX512-A Compliance
The Pathway Installation repeater is com-
pliant with DMX512-A under the non-
compatible connector (NCC) provision.
All ports are DMX512-A protected to
250V with self-healing circuitry.
Indicators
The two PWR LEDs on the Installation
Repeater will illuminate when AC power is
connected to the unit. There is no on/off
switch.
The two DATA LEDs will illuminate and
flicker rapidly to indicate that DMX data is
being received.
Two TEST indicators are associated with
the DMX input and each of the six outputs.
Refer to the Cable Test Feature instruc-
tions.

Specifications

Power Universal input (90-250V,
Supply: 50/60Hz), 0.2A
Isolation: 2500V Opto-isolation on DMX lines
4000V Mains isolation
Protection: Up to 250VAC/DC on all
port pins
Protocols: DMX512 , DMX512-A, or any EIA422
or 485 based simplex protocol
Size: 19 x 10 x 3in. (483 x 254 x 76 mm)
103 Inglewood Plaza 1439 17Avenue SE Calgary AB, Canada T2G 1J9 • +1 403 243-8110 Fax +1 403 287-1281
An essential component of any
DMX512 distribution system, the
Installation Repeater permits star
wiring installations while isolating
a n d p r o t e c t i n g c o n n e c t e d
equipment from harmful electrical
faul ts. Pathw ay In stall atio n
Repeaters feature self-healing
protection devices on all ports to
prevent internal damage when
severe faults of up to 250V are
accidentally applied to
connected DMX cabling. To help
you resolve any cable, signal or
component issues fast, there are
useful test functions built right into
the product.
Operational Philosophy
To ensure trouble free operation, DMX512
standards require that DMX devices be
installed in a daisy chain, with no tees,
wyes or stars in the DMX wiring. However,
site conditions may make star wiring
desirable or even mandatory. A Pathway
DMX Repeater permits star wiring by
making each branch of the star function
electrically as its own entity, unaffected by
the other branches of the
Additionally, opto-isolation circuitry
isolates each branch to prevent ground
loops or accidental damage from fault
voltages on DMX lines.
4802 Installation Repeater
6-way opto-isolated DMX splitter
I
NSTALLER
G
DMX Wiring
• All cabling must be in a continuous run,
daisy-chained, no "Tees" allowed
• "Stars" are permitted only in conjunction
with a repeater
• Cable shield may be earth-grounded at
one end only, preferably at the control
console
• Maximum length of one cable segment
is 1,800 ft. (550m)
• Receiving
devices
the
connectors, transmitters have female
• The last DMX device on the line must be
terminated with a termination switch or
resistor with a value of 100 to 120 ohms
between pins 2 and 3.
• 5 pin XLR type DMX connectors are
standard:
Pin 1: Common
Pin 2: Data (-)
Pin 3: Data (+)
Pin 4: Optional Data (-)
Pin 5: Optional Data (+)
• Cable must be
Belden 9842 (120Ω),
9829, 9729 (100Ω), ISO/IEC 11801
(Cat5) or equivalent
• A maximum of 32 DMX receiving
devices can be present on a single DMX
line
Mounting
star.
Installation Repeaters are designed for
indoor use, in a dry location. Mount the
Installation Repeater with appropriate fas-
teners to the wall. Run conduit into the
box through the knockouts provided, en-
suring that line voltage wiring is kept inside
the barriered power supply section.
'
S
UIDE
have male