Technical Specifications Signal Type: 24 VDC digital discrete input Channel Count: 16 input channels Rated Input Voltage: 24 VDC Channel‑to‑channel Isolation: Galvanic isolation Operating Temperature: 0 °C to +60 °C Storage Temperature: ‑40 °C to +85 °C Certifications: IEC 61508 SIL3, UL, CE Installation: Tricon chassis rack‑mount with matching baseplate Power Consumption: 8 W Weight: 1.1 kg
Functional Features Collect multi‑channel 24 VDC discrete switching signals for safety interlock loops. Each channel has independent galvanic isolation to restrain cross‑channel interference. Built‑in self‑diagnosis detects input channel open‑circuit and short‑circuit fault. Supports TMR three‑channel redundant voting of Tricon safety system. Hot‑swap capable, module replacement without safety system shutdown. Front‑panel LED indicators display channel input state and module fault alarm. Works cooperatively with dedicated baseplate and external termination assembly. Uploads channel status and fault information to TriStation monitoring software.
Application Scenarios Discrete signal acquisition for petrochemical plant emergency shutdown ESD system. Limit switch and safety relay contact signal collection for oil‑gas safety control cabinet. Safety‑related switching‑state monitoring of chemical plant burner management system. Field safety device signal input for fire and gas F&G detection control system. Auxiliary safety interlock signal collection inside power‑plant safety cabinet.
Performance Parameters Input Response Speed: Fast response for field discrete switching state change Fault Detecting Capability: Accurate identification of input channel circuit abnormality Isolation Performance: Galvanic isolation blocks interference between different field loops Redundancy Compatibility: Fully adapts to 2oo3 voting logic of Tricon TMR system Mechanical Reliability: Adapt to long‑term vibration environment inside industrial cabinet
Material Composition Main Circuit Board: Conformal‑coated multi‑layer industrial printed circuit board Housing: Flame‑retardant engineering plastic housing Isolation Unit: Channel‑level isolation electronic assemblies Input Conditioning Components: Surge suppression and signal filtering components Back‑plane Contact: Gold‑plated connector for matching baseplate Indicator Assembly: LED group for module and channel status indication
Structural Characteristics Single‑slot plug‑in module structure for Tricon chassis installation, must cooperate with dedicated DI2301 baseplate. Front panel carries status LED indicator array. Bottom edge connector mates with corresponding baseplate inside chassis slot. Internal circuit layout separates signal input area and TMR logic processing area. Front‑side mechanical latch completes locking between module and baseplate.
Working Principle 24 VDC discrete switching signals from field devices pass through termination panel and interconnect cable to DI2301 module baseplate, then transmit to each input channel of DI2301 module. Signal conditioning and isolation circuit filter interference noise and convert field electrical signal into digital logic signal. Three redundant signal channels complete synchronous data collection. Input digital data transmits through baseplate to system TriBus bus and is sent to main processor for 2‑out‑of‑3 voting calculation. On‑board diagnosis circuit monitors each channel state and reports fault information to system once abnormal condition appears.
Installation Requirements Install matched DI2301 dedicated baseplate into target slot of Tricon chassis firstly. Insert DI2301 module into installed baseplate and fasten front‑panel locking latch. Use original Triconex factory‑finished cable assembly to connect baseplate and external termination panel. Field 24 VDC discrete signal wiring connects to matched termination panel terminals. Signal cables and power cables implement separated routing inside control cabinet. Ensure cabinet ventilation condition and ambient temperature stay within rated operating scope.
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