Microcomputer Constant Pressure Water Supply Controller

The DHC-8000 series was discontinued 13 years ago and subsequently upgraded to the DHC-9000 series, which has the same dimensions but more powerful functions and can fully replace it.

1.1 Features of the DHC-9000 Series Microcomputer Water Supply Controller

This product is the latest advanced microcomputer-based water supply and replenishment controller developed in response to the demands of a wide range of users. The controller uses high-quality surface-mount electronic components and a switching power supply, integrating the latest single-chip microcomputer control technology. When combined with a frequency converter, it forms a water supply system for both domestic and fire-fighting use.

Features:

1. Powerful functionality: Timed pump switching, six-period timed startup/shutdown, and six-period time-controlled pressure enable the entire system to meet the requirements of different users.

2. Flexible configuration: The controller supports one active and one standby pump, one active and one supplementary pump, two-pump cyclic soft start, three-pump cyclic soft start, and four-pump cyclic soft start.

3. Easy to use: Panel-mounted card-style installation for convenient setup and use. Dustproof and waterproof industrial panel, designed to CE standards.

4. Simple debugging: Simplified keyboard menu-based setting and adjustment of operating status. Uses intelligent PID algorithm with self-tuning PID parameters for high reliability and precision.

5. High reliability: Hardware WATCHDOG fault reset, with the microcomputer performing automatic checks every second. The software incorporates fault tolerance concepts and anti-interference algorithms. Additionally, the microcomputer includes internal isolation to enhance anti-interference capability at the hardware level.

1.2 Functions of the DHC-9000 Series Microcomputer Water Supply Controller

l Programmable settings for one to four pumps in operation.

l Full soft start for working pumps, following the principle of first start, first stop.

l Timed pump switching when no additional pump is needed.

l Configurable upper limit protection pressure and pressure relief output.

l Configurable input of (0-5V) or (4-20mA).

l Compensation for sensor errors.

l Remote manual start/stop control function.

l Dynamic and static pressure method used for boiler water replenishment.

l Display of set pressure and real-time pressure.

l Display of inverter frequency and real-time pressure.

l Indicators for inverter faults, remote meter faults, under-voltage timeout, and water level alarms.

l Real-time clock function (with battery) (models with /T suffix have this function).

l Programmable daily six-period high/low pressure water supply and startup/shutdown (T-type models have this function).

l Sleep function.

l Programmable operational duration.

l Comprehensive password functionality.

1.3 Technical Specifications

Power supply: AC 220V +15%

Power consumption: < 6W

Contact capacity: 5A / 250V AC, 5A / 30V DC

Operating temperature: 0°C to 40°C

Storage temperature: -20°C to 85°C

Relative humidity: 20% to 90% RH

Cutout dimensions: Width 151±1mm, Height 75±1mm.

Maximum dimensions: Width 160mm, Height 80mm, Depth 95mm.

Installation method: Plug-in.

Installation environment: Locations free of water droplets, steam, corrosive and flammable gases, dust, and metal particles.

Selection Guide

1. 2 pumps (one active, one standby/supplementary): DHC-9100 / T

2. 2-pump cyclic soft start: DHC-9200 / T

3. 3-pump cyclic soft start: DHC-9300 / T

4. 4-pump cyclic soft start: DHC-9400 / T

Model number explanation: D H C – 9 X 0 0 / T (with clock control)

Model number, Series number, Number of operational pumps