Luxlink RS-422 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 two 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 2004 Liteway, Inc. 107553 Rev E
OPERATING INSTRUCTIONS
Fiber Optic RS-422 / RS-485
Converter
Model DX-7221
The DX-7221 is designed to allow a four-wire full duplex RS-
422 transmission system to be connected to a two-wire RS-
422/485 half-duplex data bus. The system will transmit signals
from DC to 50 Mb/s.
Technical Specifications
Bandwidth DC-50 Mb/s
Protocols supported RS-422/485 2 wire, TTL
Rise/Fall Time 20 ns typical
Bit-error Rate 1 x 10-9 (worse case)
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 DX-7221. For proper operation, the
units should always be connected as shown.
Typical Digital Data Application
Fiber Optic
Cable
DX-7221 DX-7201
TTL Out
ALM-1000
TTL Out
RS-485
In/Out
Alarm
Contacts
TTL enable
Signal RS-422
Out
TTL In
RS-422
In
Configuration DIP Switch Settings
Before applying power set the 10 position DIP switch as follows:
Protocol 1 2 3 4 5 6 7 8 9 10
TTL Off Off Off Off Off Off Off On * **
RS-422/485 Off Off On On Off Off On On * **
*Switch 9 is used to select the TTL signal impedance level. On=50
ohms, Off=Hi Z.
** Switch 10 is used to select or defeat the Alarm mode.
On=Defeated, Off=Enabled
Signal Input/Output Considerations
With a TTL logic 0 enable signal (or no connection) applied to position
1 of the DX-7221 signal terminal block the DX-7221 may be used to
transmit an RS-422/485 signal applied to signal terminal block
positions 4 and 5. Note that position 3 is used as the common return
for the TTL signal or an RS-422/485 shield.
With a TTL logic 1 enable signal applied to position 1 of the DX-7221
signal terminal block the DX-7221 will output a received RS-422/485
signal at terminal block positions 4 and 5 as well as a TTL signal at
the TTL output BNC connector. With a TTL logic 1 signal applied the
DX-7221 cannot be used to transmit an RS-422/485 signal.
The BNC TTL input and output connectors can be used to transmit
and receive TTL signal levels regardless of the logic level of the TTL
enable signal applied to position 1of the signal terminal block.
When using the TTL mode of operation, DIP switches 3, 4 and 7 must
be set to the OFF position.
Signal Terminal Block Connections
Pin Function
1 TTL Enable
2 No Connection
3 Ground, Shield, and TTL Return
4 RS-422 (–) Input / Output
5 RS-422 (+) Input / Output
BNC Connections
BNC Label Description center pin
Signal input TTL to be transmitted
Signal output TTL being received
Note that both BNC shells are TTL common (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-7201 to
DX-7221 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 DX-7221
DX-7201