Yokogawa DTSX200 Distributed Temperature Sensing Modules – DTSX200-N0EN

Technical Dossier

Product Details And Specifications

Yokogawa DTSX200 Series Technical Notes

The Yokogawa DTSX200 series is a fiber-optic distributed temperature sensing (DTS) system deployed across critical heavy-industry infrastructure worldwide, including petrochemical complexes, LNG terminals, oil refineries, nuclear power facilities, and long-distance pipeline monitoring networks. Based on Optical Time Domain Reflectometry (OTDR) principles using Raman scattering, the DTSX200 delivers continuous, real-time temperature profiles along sensing fiber cables spanning up to 30 km, with spatial resolution as fine as 1 meter and temperature accuracy of ±1°C. Its architecture supports both single-ended and double-ended measurement configurations, making it adaptable to a wide range of installation topologies. The system is certified for use in hazardous area classifications and integrates natively with Yokogawa's CENTUM VP DCS and ProSafe-RS safety instrumented systems via standard fieldbus and Ethernet protocols.

DTSX200 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified DTSX200 series module range, classified by functional category. Each model is a discrete, field-replaceable unit within the DTSX200 system architecture.

Controller / Main Unit

• DTSX200-N0EN: Standard DTS controller unit, single optical channel, Ethernet output, 100BASE-TX, up to 8 km fiber range, rack-mount form factor.
• DTSX200-N0EL: Long-range DTS controller, single optical channel, extended fiber reach up to 20 km, enhanced laser power, Ethernet output.
• DTSX200-N0EX: Extended-range DTS controller, single optical channel, maximum 30 km fiber sensing range, high-sensitivity APD detector.
• DTSX200-N2EN: Dual optical channel DTS controller, standard range (8 km per channel), Ethernet output, supports two independent fiber zones.
• DTSX200-N2EL: Dual optical channel DTS controller, long-range configuration (20 km per channel), Ethernet output.

Optical Switch / Channel Expansion Modules

• DTSX200-SW04: 4-port optical switch module, expands single controller to monitor up to 4 fiber zones sequentially, compatible with all DTSX200-N0 controllers.
• DTSX200-SW08: 8-port optical switch module, expands monitoring capacity to 8 fiber zones, rack-mount, hot-swap capable.
• DTSX200-SW16: 16-port optical switch module, maximum zone expansion for large-scale pipeline or perimeter monitoring applications.

Communication & Interface Modules

• DTSX200-MBTCP: Modbus TCP communication adapter, enables DTSX200 integration with third-party SCADA systems and Modbus-compatible PLCs.
• DTSX200-OPC: OPC-DA/UA server interface module, provides real-time temperature data export to OPC-compatible historian and HMI platforms.
• DTSX200-RS485: RS-485 serial communication adapter, legacy interface module for integration with older DCS platforms lacking Ethernet connectivity.

Power Supply Modules

• DTSX200-PSU24: 24 VDC power supply unit, primary power module for DTSX200 controller and expansion chassis, DIN-rail or rack-mount.
• DTSX200-PSURD: Redundant power supply module, dual-input 24 VDC configuration, provides N+1 power redundancy for continuous operation in critical applications.

Sensing Fiber & Accessories

• DTSX200-FBR-MM: Multimode sensing fiber cable assembly, 50/125 µm, pre-terminated with FC/APC connectors, standard lengths available from 100 m to 10 km.
• DTSX200-FBR-SM: Single-mode sensing fiber cable assembly, 9/125 µm, optimized for long-range DTSX200-N0EL and N0EX configurations.
• DTSX200-CAL: Calibration reference module, contains factory-calibrated temperature reference sections for periodic field verification of measurement accuracy.

Quality Control for the DTSX200 Range

DTSX200 modules present specific verification challenges due to their optical signal chain and embedded firmware dependencies. DriveKNMS applies a structured test protocol to all DTSX200 units prior to shipment. Controller units undergo optical output power measurement using a calibrated optical power meter to verify laser source integrity within Yokogawa's specified tolerance band. Fiber connectivity is validated using an OTDR trace to confirm backscatter signal quality and absence of splice or connector losses exceeding 0.5 dB. Communication interfaces are tested for correct Ethernet frame transmission, Modbus register mapping, and OPC tag enumeration where applicable. Optical switch modules are cycled through all port positions under load to verify switching repeatability and insertion loss consistency. Power supply modules are tested under rated load conditions with input voltage variation to confirm regulation performance. All units are assigned a test record with measured parameters, firmware version, and hardware revision documented prior to dispatch.