Detailed Description

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 is fully replaceable.

1.1 Features of DHC-9000 Series Microcomputer Water Supply Controller

This product is the latest advanced microcomputer 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, is powered by a switching power supply, and integrates 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-segment timed startup/shutdown, and six-segment 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 replenishment 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. Software incorporates fault tolerance concepts and anti-interference algorithms. Additionally, the microcomputer includes internal isolation to enhance hardware anti-interference capability.

1.2  Functions of DHC-9000 Series Microcomputer Water Supply Controller

l           Programmable setting for one to four pumps 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 (0-5V) or (4-20mA) input.

l           Compensation for sensor errors.

l           Remote manual control for start/stop function.

l           Dynamic and static pressure method for boiler water replenishment.

l           Display of set pressure and real-time pressure.

l           Display of inverter frequency and real-time pressure.

l           Fault indicators for inverter, remote meter, under-voltage timeout, and water level alarm.

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

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

l           Sleep function.

l           Programmable operating period.

l           Comprehensive password function.

1.3  Technical Specifications

Power supply: AC 220V +15%

Power consumption:  < 6W

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

Operating temperature: 0°C ～ 40°C

Storage temperature: -20°C ～ 85°C

Relative humidity: 20 ～ 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 from water droplets, steam, corrosive and flammable gases, dust, and metal particles.

Selection Guide

1.    2 pumps (one active, one standby/replenishment):   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 explanation:     D H C – 9 X 0 0 / T (with clock control)

Model    Series number   Number of operable pumps