Model Explanation

B875 = 8-channel analog input module series; 001 = Fixed dual-range specification, with one of the two options for hardware jumpers (4-20mA/1-5V); Compared with B875-002 (full-range multiple voltages/current), 001 does not have the expansion ranges of ±10V, 0-10V, etc. Technical Specifications

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

Fixed range: 4~20mA, 1~5VDC, single channel board-mounted jumper switch for mode selection

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

Resolution: 12-bit AD conversion, full-scale error ≤ ±0.05% FS

Full-channel scanning cycle: 8 channels complete acquisition takes approximately 710ms

Backplane power supply: 5VDC power taken from the rack bus, total power consumption of the machine is approximately 350mA, no external on-site power required

Dimensions: 51 (W) × 203 (H) × 280 (D) mm, net weight 0.82kg

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

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

Interface and matching base

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

The on-site pressure, temperature and liquid level two-wire transmitters convert 4-20mA/1-5V analog signals into PLC digital quantities, completing the collection of process parameters, as well as alarm for broken lines and range over-limit. Applicable scenarios

Renovation and replacement of the old Modicon 984 system in thermal power boilers and refining and chemical plants, with all on-site points uniformly set as centralized collection positions for 4-20mA/1-5V transmitters.

Operation and Maintenance

Modules are plugged and unplugged into the I/O slots of the 800 rack. The internal jumpers of the board modify single-channel current/voltage; OVER red light = input exceeds upper limit, UNDER red light = signal is below lower limit / line break; Compatible with the entire series of B872 AO and B873 AI for mixed use in the same rack.