Technical Specifications Interface Type: D‑type connector for Tricon I/O module mating, screw terminal block for field wiring Isolation Support: Cooperate with corresponding I/O module to realize field‑logic electrical isolation Rated Operating Voltage: Max 250 V Rated Signal Current: Max 5 A per terminal Operating Temperature: -40 °C to +70 °C Storage Temperature: -50 °C to +85 °C Relative Humidity: 5%‑95%, non‑condensing Mounting Mode: Install inside Tricon I/O cabinet or external mounting bracket Certifications: CE, UL, ATEX Weight: 0.46 kg
Functional Features Convert internal high‑density module connector to accessible screw‑type field wiring terminals. Integrate surge and transient suppression components for field signal loops. Provide convenient test points for on‑site signal measurement and troubleshooting. Support fast disconnection of field wiring without removing I/O main module. Reserve circuit space for external fuse installation for individual field channels. Resist electromagnetic interference in complex industrial cabinet environment.
Application Scenarios Field wiring interface for Tricon SIS digital input and output modules. Petrochemical plant safety instrumented system cabinet termination. Oil‑gas ESD system field instrument wiring transition. Power plant safety interlock cabinet signal termination. Fire and gas monitoring system field signal interface conversion.
Performance Parameters Contact Reliability: Gold‑plated contacts ensure long‑term stable signal transmission Surge Withstand: Withstand 1500 V transient surge interference Mechanical Service Life: Repeated plug‑unplug cycles meet industrial cabinet long‑term usage requirement Loop Protection: Support per‑channel external fuse protection
Material Composition Circuit board: Anti‑corrosion conformal coated industrial printed circuit board. Terminal block housing: High‑strength flame‑retardant engineering plastic. Connector components: Gold‑plated D‑sub connectors and screw terminals. Internal auxiliary components: Surge suppression devices, test point terminals. Mounting hardware: Metal anti‑loosening mounting screws.
Structural Characteristics Flat plate‑shaped cabinet‑mount termination board structure. One side equipped with D‑sub connector for connecting main I/O module cable. Other side arranged with multiple rows of screw‑type wiring terminals. Reserved test jack positions for multimeter on‑site measurement. Standard mounting holes for cabinet bracket fixed installation. Printed channel marking for convenient field identification.
Working Principle Signals from field instruments access screw terminals of 275‑2 module. Transient‑suppression components suppress surge interference from field wiring. Signals transmit through internal circuit traces to D‑sub connector and reach corresponding Tricon I/O main module. Test points tap signal for on‑site measurement without disconnecting production wiring. External fuses installed on board provide over‑current protection for individual field loops.
Installation Requirements Mount termination module on designated bracket inside control cabinet. Keep sufficient clearance for wiring and subsequent maintenance operation. Shield layer of field shielded twisted‑pair cables shall be grounded following official grounding specification. Tighten terminal screws with torque complying with manufacturer recommended value to avoid poor contact. Separate signal wiring and high‑voltage power wiring routing to reduce crosstalk. Maintain cabinet environment within rated temperature and humidity without condensation.
Usage Notes Do not exceed maximum rated voltage and current of each terminal. Carry out power‑off operation before modifying field wiring on termination board. Check terminal screw tightness periodically in routine maintenance work. Match with designated Tricon I/O module and dedicated connecting cable only. Avoid liquid, dust and conductive debris accumulating on module surface. Do not modify onboard circuit components arbitrarily.
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