Description
Honeywell TC-TBCH
Technical Specifications Screw terminal type; Rated signal voltage DC/AC; Group channel isolation; Operating temperature 0°C to +60°C; Compatible with Honeywell DCS rack system; Channel marking printed on terminal housing; Supports shielded cable termination; Mounted at rear side of control rack.
Functional Features Centralized termination for multiple I/O signal channels; Independent screw terminals for each signal line; Printed channel marking for quick identification; Physical isolation between adjacent signal groups; Strain relief design protects cable core from pulling force; Compatible hot swap operation of matched I/O modules; Shield connection terminal for instrument cable shielding.
Application Scenarios Petrochemical DCS control rack; Power plant distributed control system; Refinery process control cabinet; Chemical batch production plant; Pharmaceutical process monitoring system; Water treatment DCS panel.
Performance Parameters Terminal contact resistance remains stable after repeated wiring; Insulation resistance between channels meets DCS standard; Terminal clamping force maintains long-term stability; Marking printing resists fading in industrial environment; Withstands thermal cycling inside control cabinet.
Material Composition Flame-retardant plastic terminal housing; Tin-plated brass terminal conductors; Steel clamping screws; Plastic cable strain relief clip; Printed channel identification marking; Internal copper jumpers for system connection.
Structural Features Long strip terminal block assembly; Channels arranged in sequential rows; Each channel has separate wire inlet and clamping screw; Strain relief clip for cable bundle fixing; Rear rack mounting bracket; Shield common terminal bar integrated on assembly.
Working Principle Field instrument cables including transmitters, switches and actuators are routed to TC-TBCH terminal assembly. Cable cores are fixed on corresponding terminals by clamping screws. Internal jumpers transmit analog or digital signals from terminals to DCS I/O modules mounted on rack front side. The terminal assembly separates each signal channel and provides a fixed connection point for field wiring. Maintenance staff can disconnect single channel signal at terminals without touching DCS module.
Installation Requirements Install terminal assembly at rear of Honeywell DCS rack; Use shielded twisted pair cable for analog instrument signals; Single-point grounding for cable shield; Keep signal cables separated from high voltage power cables; Secure cable bundle by strain relief clip to reduce tension on terminal wires.
Precautions for Use Cut off field loop power before modifying terminal wiring; Check terminal screw tightness regularly; Do not mix high power wiring with low level analog signal terminals; Verify channel marking matches DCS configuration after wiring; Prevent metal debris from falling into terminal gaps.
