Description
Technical Specifications
- Supported Serial‑Signal Standard: RS‑232‑C, RS‑422, RS‑485 serial physical‑layer signal
- Terminal Connection Form: screw‑clamp terminal, compatible wire gauge 14‑24 AWG
- Maximum Field‑Circuit Voltage: 30 VDC
- Operating Ambient Temperature: ‑40 °C ~ +70 °C
- Storage Temperature: ‑50 °C ~ +85 °C
- Relative Humidity: 5 %‑95 %, non‑condensing
- Airborne Contaminant Classification: ISA‑S71.04‑1985 Class G3
- Protection Class: IP20
- Shock Resistance: 10 g half‑sine pulse for 11 ms
- Vibration Resistance: 1 mm peak‑to‑peak amplitude for 2‑13.2 Hz; 0.7 g acceleration for 13.2‑150 Hz
- Mechanical Feature: rotary anti‑mismatch coding key, integral hot‑swap with matched serial‑interface I/O‑module
- Safety Approval: ATEX, IECEx and FM certification for Zone 2 hazardous‑location deployment
Functional Features Special‑optimized internal trace layout for serial differential‑signal transmission, reduces signal reflection and crosstalk interference. Screw‑clamp terminals complete wiring termination for RS‑232‑C, RS‑422, RS‑485 serial communication cables. Rotary mechanical coding key prevents mismatched pairing with non‑serial‑type I/O‑module hardware. High‑stability spring‑contact structure maintains reliable electrical connection under cabinet vibration environment. Supports integral removal and replacement together with matched serial‑interface I/O‑module without disconnecting external serial‑communication cables. Reserved marking area on housing surface supports serial‑port‑channel identification label sticking for field‑maintenance convenience. Complies with international hazardous‑area installation certification requirements.
Application Scenarios Petrochemical‑plant analyzer‑cabinet, power‑station auxiliary‑system control cabinet, chemical‑plant third‑party‑device interconnection cabinet. Used for serial‑cable wiring termination for gas chromatograph analyzers, external PLC equipment, vibration‑monitoring instruments and other serial‑protocol intelligent‑devices, cooperates with M‑Series serial‑interface communication‑I/O‑modules.
Performance Parameters Internal trace layout guarantees serial‑signal transmission quality within baud‑rate working‑range of matched I/O‑module. Terminal‑contact resistance maintains low‑stable value for whole equipment service‑life cycle. Mechanical key‑coding mechanism eliminates hardware mis‑assembly risk caused by human‑operation error. Electrical‑connection reliability remains stable under long‑term cabinet vibration working‑condition. Supports 7×24‑hour uninterrupted continuous industrial‑site running.
Material Composition Flame‑retardant high‑strength engineering‑plastic housing. Tin‑plated copper‑alloy screw‑clamp terminal contact components. Differential‑signal‑optimized glass‑epoxy printed‑circuit substrate. Stainless‑steel mechanical locking hardware for fastening onto M‑Series carrier‑base.
Structural Characteristics Modular snap‑on construction for front‑face installation onto M‑Series I/O carrier‑base. Front‑plane arranged screw‑clamp terminal groups for serial‑communication cable wiring work. Rotary coding dial located on side wall for hardware‑compatibility configuration. Rear‑side contact assembly precisely mates with front‑side contact points of M‑Series serial‑interface I/O‑module. Side‑mounted locking latches fasten terminal‑block unit firmly onto carrier‑base front plane. Blank marking zone reserved on housing surface for serial‑port‑channel identification tagging.
Working Principle External third‑party‑device serial‑communication cables terminate onto KJ4001X1‑NB1 front‑side screw‑clamp terminals. Serial differential or single‑ended signals transmit through interference‑optimized internal traces of terminal‑block unit, pass rear‑side contact assembly and enter corresponding serial‑port channel circuit of plugged‑in M‑Series serial‑interface I/O‑module. Rotary mechanical coding dial defines compatible serial‑interface‑type I/O‑module hardware and blocks mismatched non‑serial‑module installation. This terminal‑block belongs to passive wiring hardware, carries out no serial‑protocol processing work internally.
Installation Requirements Snap terminal‑block assembly onto target slot of M‑Series I/O carrier‑base, engage side locking latches until audible click‑in engagement. Adjust rotary mechanical coding‑key setting strictly following specification of paired serial‑interface I/O‑module hardware before inserting I/O‑module. Serial‑communication cables adopt shielded twisted‑pair cables complying with serial‑physical‑layer specification. Field‑cable conductor gauge stays within 14‑24 AWG range, tighten every terminal‑screw to specified torque‑value. Complete all serial‑cable wiring work under external‑device power‑off condition. Check wiring after completion, ensure no bare copper wire strands exposed outside screw‑clamp terminal area. When deploying within Zone 2 hazardous classified locations, fully comply with ATEX and IECEx installation‑manual instruction.
Usage Precautions For RS‑485 multi‑drop bus network, install matching terminal‑resistor according to external‑device manual requirement at bus terminal position. Do not apply field‑circuit voltage exceeding 30 VDC rating onto terminal‑block channels. Check terminal‑screw tightening‑torque periodically in plant maintenance cycle. Rotary key‑setting must match hardware‑type of paired serial‑interface I/O‑module. De‑energize external serial‑device power supply before removing terminal‑block assembly. Do not disassemble terminal‑block housing; no internal components can be maintained or replaced by end‑user.
