Toshiba UTLH21 CIEMAC nV Series TC-net Optical Ring Communication Unit

UTLH21 is the dedicated optical ring communication gateway of Toshiba CIEMAC nV DCS system, manufactured in Japan, matched with HFAS11S main controller and USIO21 remote I/O station. It undertakes 100Mbps TC-net fiber ring bus data forwarding, connecting central control rack and distributed field I/O stations to realize real-time bidirectional transmission of analog/digital process signals.

This unit integrates dual RJ45 Ethernet ports and multi-channel fiber optical interfaces, supports 3 independent fault-tolerant optical loops to avoid single cable failure causing system offline. Equipped with complete running/fault LED indicators, it supports hot swap and redundant ring network deployment, widely used as spare communication hardware for thermal power and petrochemical Toshiba DCS transformation and maintenance projects.

Main Specifications

• Brand: Toshiba; Model: UTLH21; Series: CIEMAC nV DCS Optical Communication Unit, Made in Japan
• Bus Standard: TC-net I/O 100Mbps fiber fault-tolerant ring industrial bus
• Interface Layout: Dual RJ45 Ethernet ports, 6 groups of TX/RX fiber optical loop ports (Loop1~Loop3)
• Transmission Medium: Multi-mode optical fiber, long-distance anti-electromagnetic interference transmission
• Redundancy Feature: Triple independent optical ring branches, automatic bypass short-circuit fault point
• Power Supply: AC 100~240V wide-range built-in power supply module
• Diagnosis Indicator: Front panel RUN, LINK, FAULT, optical channel status LED array
• Environment Index: Operating temperature -20℃ ~ +60℃, humidity 5%~95% non-condensing, CE industrial certification
• Core Design: Hot-swappable rack installation, hardware self-test, online firmware upgrade
• Application: Spare TC-net fiber ring communication gateway for Toshiba CIEMAC nV distributed control system

Core Functions

• Build high-speed TC-net fiber ring backbone between HFAS11S central CPU and USIO21 remote I/O stations
• Real-time forward field pressure, temperature, flow analog signals and switch interlock digital signals without data delay
• Triple independent optical loops realize fault isolation; single fiber breakage automatically switches transmission path without production stop
• Dual Ethernet ports connect local operator monitoring panel and upper-level plant SCADA management system for data upload
• Fiber transmission completely isolates high-frequency interference from large fans, motors and high-voltage cabinets in industrial workshops
• Full hardware self-diagnosis quickly locate optical fiber disconnection, port damage and communication timeout faults for field maintenance
• Support online replacement without power cut, matching nV-Tool engineering software for network configuration and ring parameter debugging

Application Scenarios

• Thermal power plant boiler room, turbine room remote I/O cabinet TC-net fiber ring communication layout
• Petrochemical refining workshop distributed field signal collection redundant optical network construction
• Municipal large sewage treatment plant multi-area decentralized DCS long-distance data transmission supporting projects
• On-site faulty optical communication unit replacement and regular overhaul maintenance of Toshiba CIEMAC nV DCS racks
• Old factory automation renovation to expand multi-branch fiber ring remote signal collection coverage
• Toshiba CIEMAC nV series TC-net communication spare parts inventory backup for energy and chemical enterprises
• Metallurgical heating furnace, chemical raw material processing plant high-reliability redundant fiber network transformation projects