Serial-to-Fiber
Converters for Ventilation Control Systems in Tunnels
Air circulation,
lighting, and fire detection monitoring and control are vital
functions in traffic control systems for tunnels. Most traffic
systems rely on serial interface PLCs to manage these subsystems
and provide real-time information to the control center. A recent
trend in traffic automation involves integrating fiber-optic
cables into tunnel communication systems. Some governments have
even requested fiber-optic cabling for all public communication
systems due to the medium's extended distance capability and
EMI immunity. However, most of the devices deployed in such
applications, including the PLCs, do not come equipped with
a fiber-optic interface.
Standalone serial-to-fiber media converters, such as the ICF-1150
series, offer an efficient way to solve this problem by equipping
each serial interface PLC with fiber port connections. To save
valuable space inside the control center, Moxa's NRack System™
offers a high-density solution to house multiple fiber-optic
converters on a standard rack. In addition, multiport serial
boards, such as the CP-118U series, are required to expand the
number of serial ports on a computer for transmitting data,
commands, and programs between the host computer and multiple
PLCs.
•
CP-118U series 8-port RS-232/422/485 Universal PCI serial board
• Extended
distance between each station • Zero
data loss from electromagnetic interference •
High density solution saves space and wiring in the control center
TRC-190 series
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