Rockwell Automation 1785-TR10BF User Manual
Installation Instructions
Optical Transceiver
1785-TR10BF
The optical transc eiver enabl es a device with a n AUI inte rface to c onnect to
a 10 Mbit/s CSMA/CD LAN (ISO/IEC 8802-3, IEEE 802.3, 10BASE-FL)
via a fiber optic cable.
•
monitoring LEDs for
– link status
– RxData
– collision/jabb er control
– TxData
– power
•
SQE test can be disabled
externally
•
can be plugged directly to the device interface
•
low current consumption
•
compact construction
To the Installer
Topic Pa ge
Description 2
Installation 3
Compliance to European Union Directives 4
Technical Da ta 7
1785-5.19 - January 1999
2 Optical Transceiver
Description
The 1785-TR10BF mini optical transceiver can be connected to the AUI
interface of a device either directly or via an AUI cable. It is connected to
the fiber optic cable by a BFOC socket.
The 1785-TR10BF mini opti cal transc eiver of fer s these func tions ac cording
to IEEE 802.3 10BASE-FL:
•
indication via LEDs of data transmi ssion and reception through th e fiber
optic cable
•
detection of data collisions in the network and reporting them to the
terminal equipment as well as indicating them by an LED
•
ability to enable/disable the SQE test: at the end of every transmit
operation, a short collis ion signal ( heart beat) app rox. 1 µs long is sent to
monitor the electronics
•
jabber control and displa y: protect the network from data packet s that are
too long (> 70 ms)
•
link status: an IDLE signal continuously monitors the fiber optic cable
segment for breakage
Fiber Optic Interface
Jabber
Protect
Tx-Data
Idle
Generator
(acc. to 10BASE-FL)
Lowlight
Detection
Rx-Data
Tx-Packet
Detect
Rx-Packet
Detect
Collision
Detector
DISABLE
ENABLE
ENABLE/
DISABLE
SQE-Test
Generator
Collision
Osc.
Loopback
Data
Rx-Data
DO
CI
AUI Interface
(15-pin sub-D connector)
DI
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Optical Transceiver 3
Installation
Fiber Optic Connection
Two BFOC sockets are available for connecting the 1785-TR10BF
transceiver to a fib er op tic segment. One conne ction is u sed f or t ransmitti ng
and one for receiving data over the fiber optic cable.
The maximum length of the fiber optic segment is
•
2000 m for 50/125 fiber
•
3000 m for 62.5/125 fiber
Power Supply
The operating voltage (+12 V) is taken from the connected device via the
15-pin sub-D socket of the AUI interface.
SQE Test Setting
The slide switch on the top of the transceiver case is used to activate and
deactivate the SQE test. Before placing the transceiver in ope ration, you
should check to see whether the connected device requires the SQE test to
be on or off. As deli vered from the factory, the SQE test is on.
Connecting two devices
Connecting to
a fiber optic interface hub
Connecting Devices
1785-TR10BF 1785-TR10BF
Fiber optic cable 2000 meters (50/125 microns)
3000 meters (62.5/125 microns) max.
Fiber optic cable 2000 meters (50/125 microns)
3000 meters (62.5/125 microns) max.
Hub
PC
1785-TR10BF 1785-TR10BF
For Additional Information
For standards information, go to
copy of this publication, go to
PLC5E
PLC5E
http://www.ieee.or g/. To download a .PDF
http://www.theautomationbookstore.com/.
1785-5.19 - January 1999
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