Technical Specifications Multi‑channel serial communication interfaces, internal system bus interface, auxiliary DC power supply input. Supports standard serial communication protocols. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Conformal coated circuit board.
Functional Features Realizes serial data communication between main control unit and external serial devices. Completes serial data receiving, transmitting, protocol encoding and decoding. Supports parameter configuration for serial port baud rate, data bit and parity check. Provides communication channel fault diagnosis function.
Application Scenarios Spare serial interface board for ABB control cabinet. Applied for data interconnection with serial‑type instruments, sensors and auxiliary control equipment in process plant.
Performance Parameters Stable serial data receiving and transmitting performance. Reliable communication fault detection capability.
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Serial communication processing chip, signal isolation circuit, internal bus peripheral assemblies. Multi‑pin plug‑in connectors and metal screw mounting hardware.
Structural Characteristics Rectangular circuit‑board structure. External serial port connectors and internal system bus connectors are distributed on different edges. Reserved screw mounting holes for cabinet bracket fixation. External signal zone and internal bus zone keep layout separation.
Working Principle XS321A is powered by auxiliary DC power supply. It receives data packets from main controller via internal bus, converts data into serial format and transmits to external serial devices.
Installation Requirements Fully insert and lock each plug‑in connector. Connect external serial communication cables. Configure serial communication parameters in engineering software, verify two‑way data exchange function.
Usage Notes Serial communication parameters must be consistent with connected external devices. Anti‑static operation is mandatory.
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