320117-05A
320117-05A is a dedicated field wiring termination base matched for Ovation series I/O electronic modules including earlier referenced 3185455-F,3198378-B and other AI/AO/RTD/DI/DO cards, designed for fixed installation inside Ovation I/O cabinet and DIN rail mounting layout. It serves as intermediate transition component between cabinet backplane bus and field on-site instrument wiring, realizing physical wiring docking, signal distribution and mechanical fixation for upper plug-in electronic modules. The base integrates internal bus conductive path and external terminal wiring terminals, transferring field analog/digital signals from site transmitters, RTD sensors, actuators and switching contacts to inserted I/O modules while delivering system power from cabinet backplane to loaded electronic cards.
Description
This termination base follows unified Ovation hardware specification with hot-swap compatible structural design; field maintenance can replace upper electronic modules directly without disconnecting all field wiring on base terminals. Built-in terminal surge and overcurrent auxiliary protection layout improves anti-interference capacity against industrial site surge and stray current interference. Standard terminal layout facilitates on-site wiring arrangement and later circuit troubleshooting, widely deployed in thermal power, petrochemical and chemical process DCS cabinet wiring configuration for boiler control, pipeline flow regulation and equipment status signal collection loops.
2. Detailed Technical Specifications
2.1 Wiring & Bus Connection Specification
The base is configured with fixed quantity of field wiring screw terminals, categorized separately for analog signal, digital signal and auxiliary power wiring to avoid wrong cross wiring during site construction. Internal gold finger conductive structure precisely mates with Ovation cabinet backplane to complete system bus communication and power supply transmission for loaded I/O modules. Terminal screw adopts standard industrial locking structure to prevent wiring looseness caused by equipment vibration inside control cabinet; each terminal supports single or multiple wire crimp connection according to field cable specification. Internal circuit sets independent signal partitioning routing to isolate analog low-level signals and high-current digital switching signals for reducing cross-interference between different signal types.
2.2 Electrical Performance Specification
Rated working power is passively fed via backplane without independent external power input. Internal insulation between field terminal side and backplane bus side withstands up to 1000V AC isolation voltage, blocking abnormal high voltage from field wiring invading system backplane circuit. Terminal path matches full load current rating of matched Ovation I/O modules, bearing maximum channel rated load current without heat accumulation under long-term continuous operation. Internal built-in distributed filtering layout suppresses common-mode noise coupled from field long-distance signal cables, coordinating with upper electronic module’s EMC design to enhance overall system signal stability.
2.3 Environmental Working Specification
Continuous operating ambient temperature ranges from 0℃ to +60℃ inside sealed industrial control cabinet; spare storage temperature covers -40℃ to +85℃ for warehouse stock and long-distance transportation. Reliable operation is available under 5%~95% non-condensing relative humidity environment, adapting to conventional cabinet slight dust and damp conditions. Installation is prohibited in locations with persistent corrosive gas, continuous liquid splashing and dense oil mist environment. The whole base complies with CE and EMC electromagnetic compatibility certification requirements to meet global industrial automation application standards.
2.4 Mechanical & Installation Specification
The termination base complies with Ovation unified dimensional standard and standard 35mm DIN rail clamping mounting design, fixed firmly on cabinet internal mounting rail via integrated buckle structure without extra auxiliary fixing accessories. Single base slot matches corresponding specification I/O electronic module card size, supporting one or two standard Ovation I/O modules plugged in according to cabinet layout demand. Standard cabinet slot address definition is realized through backplane docking position, no extra address setting required after module insertion. High-strength flame retardant engineering plastic housing improves mechanical shock resistance and fireproof performance during long-term cabinet operation and equipment transportation.
2.5 Protection & Matching Compatibility Specification
Structural design reserves space for external auxiliary fuse installation on terminal area for optional overcurrent fuse protection on important field signal loops. Full compatibility with mainstream Ovation analog input, analog output, RTD temperature acquisition and digital input/output electronic modules including previously listed part numbers, realizing flexible cabinet I/O configuration combination. All wiring terminal layout corresponds with official Ovation software channel definition, matching system configuration parameter setting logic to shorten field commissioning period. Fault inspection can be implemented via terminal external measurement without dismounting entire base from cabinet rail for convenient daily maintenance work.
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