Model Explanation

B875 = 8-channel analog input module series; 002 = Full-scale configurable version, with onboard jumpers allowing free switching of 5 types of input specifications; 001 is limited to 4-20mA/1-5V dual-range; 002 expands to full-scale selection of positive and negative voltages, and single-polarity voltages. Technical Specifications

Channels: 8 independent electrical isolation channels, 250VAC insulation between channels, 300VAC insulation between channels and the backplane

Selectable ranges: 4~20mA, 1~5VDC, 0~5V, 0~10V, ±10VDC, with independent jumper switching for each channel

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

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

Scan cycle: Complete 8-channel acquisition takes approximately 720ms

Backplane power consumption: 5VDC power supply for the rack, approximately 360mA for the entire unit, no external power supply required

Dimensions: 51 (W) × 203 (H) × 280 (D) mm, net weight 0.83kg

Status indicator lights: RUN green light for operation, OVER red light for over-range, UNDER red light for under-range

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

Interface and matching base

Standard screw terminal base: AS-8535-000, compatible with unified wiring of two-wire current transmitters and three-wire voltage sensors. Core function

Convert various types of analog signals from on-site pressure, temperature, liquid level, and displacement sensors into digital quantities for PLC. Support mixed access of current / single-polarity voltage / positive-negative voltage points within the same module. Equipped with fault alarms for open circuit and over-range conditions. Applicable scenarios

Technical renovation and replacement of the old devices in the refining and power plants using the Modicon 984 system, with mixed on-site points including 4-20mA, 0-10V, ±10V and other types of signals for mixed signal acquisition stations.

Usage and Maintenance

The modules can be directly plugged and installed into the 800 rack slots, and the range can be modified for each channel by modifying the jumpers on the board; OVER red light = input exceeds limit, UNDER red light = signal is too low / line break; It can be used in the same rack with the B875-001, B873 full series, and B872 output modules.