Model Explanation

B875 = 8-channel analog input series; 200 = 2-series multi-functional PCB, single-channel independent range configuration, compatible with thermocouples / RTDs / strain / current / voltage full signals, differential fixed wiring

1XX model: Only voltage / 4-20mA conventional instrument

200: Special for temperature and strain sensors, channel parameters do not interfere with each other Technical Specifications

Channel Configuration: Fixed 8-channel differential input, non-switchable single-ended input. 250VAC isolation between channels, 300VAC insulation withstand voltage on the backplane.

Optional input types (software selectable for each channel)

Thermoresistors: Pt100, Cu50, Ni120

Thermocouples: K, J, T, E, S, R, B scale

Strain gauges: Full bridge / half bridge millivolt small-signal

Current: 4~20mA, 0~20mA, onboard selectable 250Ω sampling resistor

Voltage: ±5V, ±10V, 0~5V, 1~5V, millivolt-level small voltage

AD Conversion: 12-bit high-precision analog-to-digital conversion, full-scale range at 25℃ with an error ≤ ±0.12% FS

Full-channel scanning: 32ms full-channel refresh rate

Backplane power supply: Rack 5VDC power input, rated 460mA

Dimensions: 51 (W) × 203 (H) × 280 (D) mm, net weight 0.95kg

Status indicator lights: RUN running green light, OVER over-range red light, UNDER open circuit / short circuit alarm red light

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

Interface and matching base

Universal original screw terminal base: AS-8535-000, compatible with the entire series of B875 card base.

Core functions

Independent parameter setting for each channel. The same module's 8 channels can be mixed for use with thermoresistors, thermocouples, transmitters, and strain sensors; hardware built-in cold-end compensation circuit adapted for thermocouple temperature measurement; RTD open circuit, thermocouple open circuit, and circuit short circuit hardware indicator light alarms; no need for internal jumpers on the board, all ranges and signal types are configured through PLC software. Applicable scenarios

Thermal measurement project for boiler furnace, multi-point temperature measurement in chemical reaction vessels, strain stress acquisition for test equipment, and mixed measurement point transformation project for on-site temperature + transducer.

Operation and Maintenance

Insert directly into the Modicon 800 rack I/O slot, with fixed differential wiring; for temperature measurement points with UNDER alarm, prioritize checking for sensor breakage and compensation line faults; for abnormal current signals, verify the power supply of the circuit; it can be used in the same rack with all models of B875.