Model Explanation

B873 = 4-channel analog input module series; 011 = Full-scale jumper configuration type, compared with 001 (only 4-20mA/1-5V), 011 is compatible with ±10V, 0-10V, 0-5V, 4-20mA four types of signals. Among all the B873 series, it has the widest range coverage. Technical Specifications

Channels: 4 independent channels are isolated. There is 250VAC isolation between channels and 300VAC withstand voltage between channels and the backplane.

Selectable ranges: 4~20mA, 1~5V, 0~5V, 0~10V, ±10VDC. Each channel can be switched by a separate jumper.

Input impedance: Voltage range 1MΩ, current range has a built-in 250Ω precision sampling resistor.

Resolution: 12-bit analog-to-digital conversion, full-scale error ≤ ±0.1% FS

Backplane power supply: Rack 5VDC bus power supply. The total power consumption of the entire unit is approximately 320mA. No external on-site power supply is required.

Dimensions: 51 (W) × 205 (H) × 280 (D) mm, net weight 1.33kg

Indicators: RUN running green light, OVER over-range red light, UNDER under-range red light

Environment: Operation 0~60℃, storage -40~85℃, humidity ≤ 80% RH without condensation, IP20 protection

Interface and matching base

Standard screw terminal base: AS-8535-000, suitable for both two-wire and three-wire transmitters and voltage meters. Core function

The multi-format analog signals from pressure, temperature and liquid level transmitters are uniformly collected, converted into digital quantities within the PLC, and adapted for centralized collection of mixed points (a portion of current transmitters and a portion of voltage sensors). Applicable scenarios

DCS renovation of thermal power boilers, replacement of Modicon984 system spare parts for old chemical production facilities, and existing on-site points have both 4-20mA and ±10V/0-10V mixed type acquisition positions.

Operation and Maintenance

Modules can be hot-swapped into the 800 rack I/O slots, and the jumper caps inside the boards can be modified to set the single-channel range; a red light constantly on = input open circuit, over-range or on-site short circuit; compatible with all series B872, B873-001 for mixed insertion in the same rack.