Model Explanation

B875 = 8-channel analog input module; 011 = Differential + Full-scale configuration version

001: Only 4-20mA/1-5V fixed range, single-ended input

002: Multiple ranges, only single-ended input

011: Full-scale + single-ended / differential one-select hardware jumper, compatible with 5 types of voltage + current signals Technical Specifications

Channels: 8 channels, hardware supports 8-channel differential or 16-channel single-ended input; 250VAC isolation between channels, 300VAC withstand voltage of the backplane

Optional ranges: 4-20mA, 1-5V, 0-5V, 0-10V, ±10VDC, independent channel jumper switching

Input impedance: Voltage 1MΩ, built-in 250Ω precision sampling resistor for current

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

Overall power consumption: Rack-mounted 5VDC power supply, approximately 370mA, no external on-site power supply required

Dimensions: 51 (W) × 203 (H) × 280 (D) mm, net weight 0.85kg

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

Environmental specifications: Operating temperature 0-60℃, storage temperature -40-85℃, humidity ≤ 80% RH without condensation, IP20 protection

Interface and matching base

Standard screw terminal base: AS-8535-000, universal wiring for differential instruments, two-wire system transmitters, and three-wire system voltage sensors. Core function

Collect analog signals from pressure, temperature, liquid level and displacement instruments at the site. Differential wiring can suppress long-line interference in industrial environments. The same module can freely use current, single-polarity voltage, and positive-negative voltage points. It also comes with fault alarms for open circuit and over-range conditions. Applicable scenarios

Renovation of old refining and thermal power boilers' Modicon 984 system for high-precision acquisition stations with long on-site wiring distances, high interference, and mixed signal specifications.

Operation and Maintenance

The modules can be directly plugged into the I/O slots of the 800 rack. Board internal jumpers: change the range + differential / single-ended mode; OVER red light = signal exceeds upper limit, UNDER red light = line break / signal below the lower limit of the range; It can be compatible and mixed with B875-001/002, B873 entire series, and B872 output modules on the same rack.