Model Explanation

B885 = Programmable ASCII Intelligent Communication Series; 002 = Dual Independent Isolated Serial Port Specification (compared to 001 single serial port version), dual serial ports do not interfere with each other and can be independently configured with protocols and baud rates. Technical Specifications

Communication Port: 2 independent serial ports, each port can be selected as RS232/RS422 by software, with baud rate adjustable from 110 to 19200 bps, data bits 5 to 8, parity check, and stop bit programmable configuration.

Data Interaction: Backplane OURBUS bus interaction, occupying PLC6 input registers + 6 output registers to achieve bidirectional reading and writing of data between the module and PLC

Storage Configuration: 64K RAM + onboard EEPROM, BASIC user program is saved when power is off, no need for backup battery

Backplane Power Consumption: 5VDC@500mA, 4.3VDC@1760mA, single slot rack installation position

Form and Weight: 58×267×216mm, net weight 1.4kg

Environmental Specifications: Operating temperature 0~60℃, storage temperature -40~85℃, humidity ≤80% RH without condensation, IP20 cabinet installation

Interface and Matching Base

Matching wiring base AS-8535-000, same as B884-002, B885-001 bases, cannot be combined with B883-200/201 temperature measurement dedicated terminal base.

Core Functions

Two independent serial ports run independently with BASIC programs, two ports respectively connect different brand instruments, frequency converters, weighing terminals; the module independently completes serial port reception and transmission, data parsing, engineering quantity conversion, does not occupy PLC scanning cycle; panel operation / fault dual LED indicator lights, program abnormal error prompt; one serial port connects on-site instruments, the other is externally connected to the upper-level touch screen / industrial computer, achieve one card dual use; supports custom frame header verification, disconnection reconnection, abnormal data filtering logic. Applicable scenarios

Chemical reaction釜 multi-channel temperature controller + flowmeter simultaneously collect data; extruder multiple weighing instruments networked； old production line instruments + upper computer two-way communication； water treatment multiple brand sensors connected to PLC via serial ports.

Operation and Maintenance

Plug directly into Modicon800 standard I/O slot； single-channel communication failure can be isolated and checked by inspecting the corresponding serial port wiring and parameters， without affecting the other channel communication； lost program can be downloaded via one of the serial ports using BASIC program； the rack can be mixed with B883 temperature measurement and B884-PID full series special IO cards.