Model Explanation

B872 = 4-channel analog output module series; 100 = Fixed 4-20mA industrial loop current output, differences: 000 (4-20mA old model), 001 (0-20mA), 002 (±10V), 200 (0-10V), 011/032 jumper mixed type; 100 is an improved version of 4-20mA, with stronger ability to adapt to external power supply in the loop. Technical Specifications

Channel: 4 independent channels with electrical isolation, the backplane bus is isolated from the on-site load

Output specifications: DC 4-20mA active loop output, supports 6-30VDC loop power supply

Backplane power supply: Rack 5VDC bus, module total power consumption ≤ 5W, bus consumption 550mA

Form: 51 (W) × 229 (H) × 279 (D) mm, net weight approximately 0.9kg

Indicators: Four independent channel fault red lights, module operation green lights

Operating conditions: Operation 0-60℃, storage -40-85℃, environmental humidity < 80% RH without condensation

Accuracy: Full-scale output error ≤ ±0.1% FS

Interface and matching base

Standard screw-fixed wiring base: AS-8535-000, four-wire loop wiring, suitable for control valves, two-wire signal valve positioners. Core function

The internal digital signals of the PLC are converted into standard 4-20mA industrial current, which is used to drive two-wire control valves, frequency conversion speed regulation settings, and field loop-type instruments, and is compatible with conventional loop power supply conditions. Applicable scenarios

Replacement of the old Modicon 984 control systems in thermal power, petrochemical, water treatment and metallurgy is carried out. General 4-20mA two-wire valve control points are used on-site.

Operation and Maintenance

The module can be directly hot-swapped into the 800 series I/O slots without the need for internal jumpers on the board; a red light on a single channel indicates a short circuit in the on-site circuit or abnormal supply voltage of the loop; it can be used in the same chassis with the full series of B872 000/001/002/200/011.