Comnet FDX72S1SHR User Manual
INSTALLATION AND OPERATION MANUAL
FDX72(M,S)1SHR
MULTI-PROTOCOL RS232/422/485 DATA TRANSCEIVER
FEATURING SELF-HEALING RING OPERATION
The ComNet™ FDX72(M,S)1SHR series Self-Healing Ring Transceiver unit is
a fully-digital transceiver designed for implementing full RS232, RS422 or
RS485 2 or 4-wire traffic signalization/communications data networks of the
highest possible reliability. A network of FDX72SHR units can support one fullduplex data channel or two half-duplex data channels. Full data re-clocking and
regeneration permit an almost unlimited number of transceiver/controller units
to be used within the network. These environmentally hardened transceivers are
ideal for use in unconditioned out-of-plant or roadside installations.
Utilizing wave division multiplexing technology (WDM), only one optical fiber is
required between units to implement a fully self-healing ring. Two FDX72SHR
units can be used in a redundant point-to-point topology.
Bi-color (Red/Green) LED indicators are provided for rapidly ascertaining
equipment operating status including the location of fiber breaks. See Figure 7
on Page 5 for an explanation of LED indications.
These units are interchangeable between stand-alone or card-cage mount
configurations. See Figure A on Page 7 for mounting instructions.
See Figures 1 – 8 for complete installation details.
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INSTALLATION AND OPERATION MANUAL FDX72(M,S)1SHR
FIGURE 1 – FDX72SHR FIBER CONNECTIONS
MULTIMODE OR SINGLE MODE OPTICAL
FIBER (DEPENDING ON MODEL)
Optical Port A must be connected to Optical
Port B on another FDX72SHR unit.
Similarly, Optical Port B must be connected
to Optical Port A on another FDX72SHR unit.
See Figure 8 on Page 6.
BLACK
BLACK WITH WHITE STRIPE
Power Supply:
Surface Mount: 8–15 VDC @ 4W
Rack Mount: From Rack
FIGURE 2 – FDX72SHR
LED Indicators
See Figure 7
Ring Length Switch
See Figure 4
Data Format Switch
See Figure 3
NOTE: Remove Electrical Connector
for Rack Mount Units
REAR PANELFRONT PANEL
7-Pin Data Connector
See Figures 5 & 6
TECH SUPPORT: 1.888.678.9427
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INSTALLATION AND OPERATION MANUAL FDX72(M,S)1SHR
FIGURE 3 – DATA FORMAT SWITCH POSITIONS
1 2 3
Switch
Lower bank of switches
}
located on front panel.
The first two switches set the
data type, the third sets the
Master/Remote Mode.
RS485 2-Wire, Sensornet
1 2 3
Master Mode
1 2 3
RS232 Data
Data
RS422, Bi-Phase or
Manchester Data
1 2 3
RS485
4-Wire Data
1 2 3
Remote Mode
1 2 3
There are two virtual data channels shared between all FDX72SHR units in a system: a Master channel and a Remote channel.
The Master/Remote Mode switch sets the data channel used by the equipment connected to each FDX72SHR unit in the system.
The behavior of a Master and Remote depends on the data type (set by switches 1 and 2):
RS232, RS422, RS485 (4-wire):
Units in Master Mode transmit data to all units set to Remote Mode.
Units in Remote Mode transmit data to all units set to Master Mode.
There is no limit to the number of Masters or Remotes in a system as long as the equipment connected to the FDX72SHR can
handle multiple Masters and multiple Remotes. Most applications requiring Master/Remote communications would use just one
Master and multiple Remotes. Masters can communicate with all Slaves, but not with other Masters. Remotes can communicate
with all Masters, but not with other Remotes.
RS485 (2-wire):
Units in Master Mode transmit data to all units set to Master Mode.
Units in Remote Mode transmit data to all units set to Remote Mode.
The concept of Master and Remote are not used with RS485 (2-wire) mode. Rather, the Master/Remote Mode switch simply sets
which of two independent data channels each unit will use. All Masters can communicate with each other, but not with Remotes.
All Remotes can communicate with each other, but not with Masters.
INS_FDX72SHR_REV–
TECH SUPPORT: 1.888.678.9427
02/29/12
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