The WP-9000 series passive distributor (output loop power supply) provides isolated power voltage to the two-wire transmitter on site, and converts the (4-20) mA signal generated by the transmitter into the required DC signal through this distributor to the control system or other intelligent instruments. Mainly used for DCS and PLC systems with input circuit power supply.
This power distribution device is powered by a circuit, with complete electromagnetic isolation between the input and output circuits.
◆ Characteristics
● Isolate and convert the mA signal input of the two-wire transmitter (4-20).
Provide driving voltage (Uo=Ue-RL × I-Ud) to the transmitter.
● Signal transmission isolation output (4-20) mA.
● Circuit power supply (20-35) VDC.
● Short circuit protection for input circuit.
● Plug and unplug terminal block, DIN rail card installation.
● Working power supply
Output circuit power supply: (20-35) VDC
● Input signal
Input signal: Two wire transmitter (4-20) mA
Maximum circuit current: 35mA
Distribution voltage for the transmitter: see the calculation diagram below

Distribution voltage: Uo=Ue-RL × I-Ud
● Output signal
Output current: (4-20) mA
Maximum circuit current: 35mA
Allowable load resistance: (50-350) Ω
Ripple (Vp-p): < 10mV
● Performance indicators
Standard accuracy: ± 0.5% FS (when the load is 100 Ω)
*Note: The smaller the load, the higher the accuracy,
For every 100 Ω increase in load, the accuracy decreases by 0.1%
Temperature drift: ± 0.015%/℃
Response time: ≤ 1s (10 → 90)%
Stability time: ≤ 3s
Insulation resistance: ≥ 100M Ω/500VDC (AC)
Isolation capability: 1500VAC/1 minute 50Hz
Electromagnetic compatibility: Complies with relevant electromagnetic standards of IEC 61000
● Environmental parameters
Working temperature: (-20~+60) ℃
Storage temperature: (-40~+80) ℃
Environmental humidity: (5~+95)% RH (without condensation)
● Structure
Card mounted type; Modular watch core; ABS material casing; Plug in terminal
Whole machine weight: approximately 110g
◆ External dimensions
Dimensions: Width x Height x Depth=16 x 116 x 110 (mm)
◆ Installation and Application
● Installation
35mm standard DIN rail card installation. Install vertically as much as possible to facilitate heat dissipation inside the instrument.
● Application
1. Connect on-site equipment: two-wire transmitter.
2. Connect to the control system (or other unit combination instruments): Control system DCS/PLC, AI receiving card with input circuit power supply function.
