Luxlink DT-7901 User manual

WARRANTY
All fiber optic transmission systems, products and accessories
manufactured by Liteway, Inc. and it’s subsidiaries are fully tested
prior to shipment and are warranted against defective materials
and workmanship for a period of five full years from the date of the
original shipment. Should a problem occur, a Return Material
Authorization Number (RMA) must be obtained from Liteway Inc.
at [phone] and the item returned to Liteway, Inc. 166
Haverford Road, Hicksville, NY 11801, USA, prepaid. Liteway Inc.
will then, at its option repair or replace the defective item.
Liteway, Inc. maximum liability under this warranty is limited to the
cost of the defective item only. No contingent liabilities of any kind
are either assumed or implied.
Any items returned to Liteway, Inc. that have been misused,
abused, damaged, modified, connected or adjusted in any way
contrary to the instructions furnished by Liteway, Inc. or repaired
by unauthorized personnel will not be covered by this warranty.
Any non-warranty repairs required will be quoted at the current
rate for such services.
Important Notices
CAUTION ! AVOID DIRECT EXPOSURE TO BEAM.
All -7,-8, and -9 Models use laser diodes. These solid-state laser diodes
are located in the optical ports of these units. Laser diodes produce
invisible radiation that may be harmful to human eyes. Never look
directly into the optical port of any fiber optic unit designed to operate
with single-mode optical fiber.
NOT FOR LIFE SUPPORT SYSTEMS
Liteway, Inc. does not authorize or warrant any of its products or
accessories for use in critical life support systems or applications of any
kind.
© Copyright 2017 Liteway, Inc. 119740 Rev D
OPERATING INSTRUCTIONS
Fiber Optic TTL / Balanced
Transmission System
DT-7901, DR-7901,
DX-7901
The DT/DR-7901 system consists of the DT-7901 transmitter
and DR-7901 receiver or two DX-7901 transceivers. This
system will transmit standard medium speed TTL signals from
DC to 50 Mb/s, or Balanced signals 2Mb/s-50Mb/s
Technical Specifications
Bandwidth DC-50 Mb/s(TTL), 2M-50Mb/s (Balanced)
Protocols supported TTL 50 ohms, TTL Hi-Z or Balanced
Rise / Fall Time 12 nanoseconds minimum
Bit-error Rate 1 x 10-9 (worse case)
Propagation delay Balanced 22.5ns (-1-3 models), 14.5ns (-7,-9)
Propagation delay TTL 20.5ns (-1-3 models), 12.5ns (-7,-9)
Signal voltage range 0-5V (TTL), 0.5V-5V (Balanced)
Signal Connectors BNC, Removable Terminal Block
Operating Wavelength 850 (-1), 1300 (-3,-7), 1550 (-9)
Optical Output -15 dBm typical
Optical Loss Budget 0 – 10 dB
Fibers Accommodated 1 Multimode (-1,-3), 1 Single-mode (-7,-9)
Temperature Range -35º to +75ºC
Power Requirements 11-24 VAC/DC @250 mA
Physical Size (mm) 5.0”(127)L x 1.0” (25.4)W x 3.0”(7)D
All specifications measured with 1Km of 62.5u multimode fiber.
All specifications are subject to change without prior notice.
!

Installation Instructions
The diagrams below show the location of the connectors and mode
configuration switches for the DT-7901 and the DR-7901. For proper
operation, the units should always be connected as shown.
Typical Digital Data Application
Fiber Optic
Cable
DT-7901 DR-7901
Signal
Source
Signal
Measurement
ALM-1000
TTL
Balanced
Input
Alarm
Contacts
Configuration DIP Switch Settings
Before applying power set the 10 position DIP switch for the mode of
operation desired as follows:
Protocol 1 2 3 4 5 6 7 8 9 10
TTL
50ohm Off Off Off Off On On Off Off On *
TTL Hi-Z Off Off Off Off On On Off Off Off *
Balanced On On On On Off Off On On Off *
*Switch 10 is used to select or defeat the Alarm mode.
On = Alarm defeated enabled, (alarm mode not active)
Off = Alarm defeated disable, (alarm mode active)
Note that on the RX switch 9 has no effect.
Signal Input /Output Considerations
The TTL 50-ohm mode presents a 50-ohm load in the DT-7901 and
requires that the DR-7901 be terminated in 50 or 75 ohms.
The Hi-Z TTL mode presents a 3K TTL load in the DT-7901 and
requires that the DR-7901 be terminated in 3K TTL load.
The TTL Signals use both the BNC connectors and the terminal
blocks to accommodate the signals.
The Balanced input / Output are transformer coupled and works with
a signal duty cycle range of 40 to 60%.
119740 Rev D
Signal Terminal Block Connections
Pin Function
1 Balanced + Output
2 Balanced - Output
3 Ground or Shield
4 Balanced - Input
5 TTL, Balanced + Input
BNC Connections
BNC Center Pin TTL input or output
BNC Shell TTL common and case ground.
Power Terminal Block Connections
Pin Function
1 Alarm output for use with optional Alarm Sensing Unit ALM-1000. No other connections should be made to this
terminal.
2 +11 to 24 DC or AC Volts input
3 AC or DC return (Common to Housing)
Be certain to check all connections, settings and voltages before
applying power
Indicator Lights
Indicator Lights when
Pwr Proper power is present.
Alrm The loss of data alarm is activated there is no data
present.
Sig A data signal is being transmitted or received. At
low data rates these indicators may blink with data.
For the DX-7901
you must connect the
transmit fiber of one
unit the to receiver of
the other unit
Fiber Optic Cable
Rd
Td
Rd
Td
POINT-TO-POINT