Description
Emerson 38B5786X132
Technical Specifications
- Supported Signal Type: Analog 4‑20mA signal and discrete digital switching signal
- Built‑in Surge Suppression Components
- Operating Ambient Temperature: 0℃ ~ 60℃
- Storage Temperature: -40℃ ~ 85℃
- Relative Humidity: 5% ~ 95%, non‑condensing
- Mounting Method: Standard DIN rail installation inside control cabinet
- Connection Type: Screw‑type wiring terminals
- Mechanical Matching: Compatible with DeltaV series plug‑in I/O modules
- Protection Grade: IP20
Functional Features Screw terminals realize reliable termination of shielded twisted‑pair field instrument cables.
Built‑in surge suppression elements clamp instantaneous high voltage pulses transmitted from field cables.
Internal printed circuit traces transmit process measurement signals upward to DeltaV I/O modules.
Reserved test terminals enable loop current measurement without removing field wiring during troubleshooting.
Precise positioning structure ensures complete electrical contact between terminal assembly and upper I/O module.
Modular structure allows independent replacement without powering off the whole rack under non‑critical maintenance conditions.
Application Scenarios DeltaV DCS control cabinets deployed in chemical plants, oil refineries, natural gas processing stations and pulp and paper mills.
It is used for signal wiring termination of pressure, temperature, level and flow transmitters connected to DeltaV analog and digital I/O modules.
Performance Parameters Internal signal traces maintain low signal attenuation for analog and digital signal transmission.
Surge protection components suppress transient voltage spikes from field cable lightning induction effectively.
Screw terminals sustain stable electrical connection under continuous cabinet vibration.
Metal contact pins retain consistent signal transmission performance after repeated plugging of DeltaV I/O modules.
Material Composition Main housing adopts flame‑retardant PA engineering plastic.
Nickel‑plated copper alloy screw terminals with anti‑corrosion coating.
Multi‑layer flame‑retardant glass‑fiber epoxy printed circuit board as internal substrate.
Solid‑state surge suppression semiconductor components.
Anti‑oxidation plated metal positioning contact pins.
Structural Features DIN rail fixed base structure for installation inside control cabinet.
Front panel arranges multiple screw terminals for field instrument signal cables.
Top metal contact pins mate with the bottom connector of DeltaV I/O module.
Independent reserved test terminals for on‑site loop inspection.
Positioning buckles lock the assembly and achieve accurate alignment with plug‑in I/O modules.
Built‑in cable routing channel keeps field wiring neat inside control cabinet.
Working Principle Field signal cables from process instruments connect to screw terminals of this terminal assembly.
Process signals pass through built‑in surge suppression circuit and internal PCB traces.
Signals transmit upward through top metal contact pins to the DeltaV I/O module installed above.
Surge suppression components absorb transient overvoltage from field cables to protect I/O module internal circuits.
Test terminals directly lead out the signal loop for on‑site current measurement and fault diagnosis.
Installation Requirements Mount the terminal assembly on standard DIN rail inside control cabinet and lock the mounting buckle.
Use shielded twisted‑pair cables for field instrument wiring and tighten each terminal screw to specified torque.
Implement single‑point grounding of cable shielding layer inside control cabinet only.
Verify full contact between top metal pins and I/O module bottom connector after module insertion.
Separate process signal wiring from high‑voltage power cables to avoid electromagnetic coupling interference.
Precautions for Use Cut off field loop power before conducting wiring modification work.
Inspect terminal screw tightness and cable insulation condition during regular cabinet maintenance cycles.
Do not apply voltage exceeding rated range to signal terminals.
Keep metal contact pins clean without dust, moisture and metal debris.
Do not disassemble or modify the internal circuit of the terminal assembly.
