MEAN WELL HEP-1000 User's Manual

0. Safety Guidelines

Risk of electrical shock and hazard. All failures should be examined by a qualified technician. Do not remove the case or modify the unit. The input voltage range is 100-240Vac (50/60Hz). Do not feed in voltage that is over or less than 10% of the specified range.

1. Introduction

1.1 Introduction

The HEP-1000 series is an industrial power supply and charger with selectable communication interfaces. It features a fanless design for silent operation and efficient heat dissipation through its aluminum case filled with heat-conducted glue.

1.2 Features

• Built-in active PFC function
• High efficiency up to 96%
• Fanless design, cooling by free air convection
• Aluminum case with heat-conducted glue
• Optional wiring type with IP67 rating
• Withstands 10G vibration test
• Wide operating temperature range: -40~70℃
• Suitable for charging lead-acid batteries (flooded, Gel, AGM) and Li-ion batteries (lithium iron, lithium manganese)
• Built-in default 2/3 stage charging curves and programmable curves
• Built-in PMBus protocol / Optional CANBus protocol
• Output voltage/current programming
• Protections: Short-circuit, Overload, Over-voltage, Over-temperature
• Built-in remote ON-OFF control
• DC OK signal
• LED indicator
• 6 years warranty

1.3 Order Information

The order information is encoded to specify the model, output voltage, and communication protocol. For example, HEP-1000-24 indicates a 24V output. The communication protocol can be PMBus (default) or CANBus.

1.4 Main Specification

The main specifications for the HEP-1000 series include DC voltage, rated current, rated power, ripple & noise, voltage adjustment range, voltage tolerance, line and load regulation, setup/rise time, hold up time, input voltage range, frequency range, power factor, efficiency, AC current, inrush current, leakage current, overload protection, short circuit protection, over voltage protection, over temperature protection, auxiliary power, DC-OK signal, working temperature, and humidity.

2. Mechanical Specification and Input/Output Terminals

2.1 Mechanism

The unit features an aluminum case with internal heatsinks. Input and output terminals are located on the sides. The front panel includes an LED status indicator and a potentiometer for voltage adjustment (Vo Adj.). The PMBus interface address selection is also accessible.

Figure 2-1 shows the terminal pin assignments.

LED Status Indicators

The LED indicators provide status information:

• Power supply mode: Green LED indicates normal function. Red (Flashing) LED indicates high internal temperature (95°C), with alarm signal sent via PMBus/CANBus, but the unit still operates. Red LED indicates abnormal status (Over-temperature protection, overload protection).
• Charger mode: Green LED indicates normal charging stages. Orange LED indicates charging (stage 1 or 2). Red (Flashing) LED indicates high internal temperature (95°C) with alarm signal. Red LED indicates abnormal status (Over-temperature protection, charge timeout).

Figure 2-2 shows the HEP-1000 output panel with LED indicators.

3. Functions

3.1 Input Voltage Range

The input voltage range is AC 90~305V or DC 250~431V. Operating outside this range may cause improper operation or damage.

3.2 Inrush Current Limiting

The unit has built-in inrush current limiting circuitry. If an external switch is used, ensure it can withstand the inrush current. A 10-second cooldown period after power off is recommended before turning the unit back on.

3.3 Output Power

The output power varies depending on the model and operating mode (power supply or charger).

3.4 Power Factor Correction (PFC)

The unit features active PFC, achieving a power factor of 0.95 or better at 90-230Vac input and full load. The power factor may be lower at partial load or higher input voltages.

3.5 Output Voltage/Current Adjustment

3.5.1 Output voltage adjustment

Output voltage can be adjusted using the SVR potentiometer on the top case with an insulated screwdriver.

3.5.2 Output Voltage Adjustment by an External 0-5Vdc Source (Output Voltage Programming)

The output voltage can be programmed using an external 0-5Vdc source connected to PV (PIN 1) and GND (PIN 3 or 4) on CN71. Figure 3-1 illustrates the connection, and Figure 3-2 shows the relationship between the external voltage and the output voltage percentage. Reduce loading current when increasing output voltage to avoid exceeding rated wattage.

3.5.3 Output current adjustment (Output Current Programming)

The constant current level can be adjusted from 20-100% of the rated current using an external DC source connected to PC (PIN 2) and GND (PIN 3 or 4) on CN71. The relationship between external DC voltage and output current is shown in the provided graph.

3.6 Short Circuit Protection & Over Current Protection

The unit is protected against short circuits and overcurrent conditions (exceeding 110% ±5% of rated output current). The unit will shut down and can be recovered by repowering after the condition is removed.

3.7 Over Voltage Protection (OVP)

Built-in over-voltage protection circuitry. OVP triggering points vary by model. After OVP is triggered, power off the unit for 10 seconds before repowering.

3.8 Over Temperature Protection (OTP) and Alarm

If the internal temperature exceeds a threshold, the unit will shut down automatically. Allow the unit to cool down for 10 minutes to 1 hour before repowering. At 95°C, a thermal alarm is triggered (red flashing LED and alarm signal), but the unit continues to operate.

3.9 DC OK Signal

A DC OK signal indicates the output voltage status. A high signal (4.4~5.5V) indicates normal output voltage, while a low signal (0~0.5V) indicates the output voltage is out of range. The maximum output current for this signal is 10mA.

3.10 Remote Control

The unit features a remote ON/OFF control circuit. The Remote ON/OFF pins (PIN 5) and +12V-AUX (PIN 7 & 8) on CN71 should be linked for normal operation. If left open, there will be no output voltage. Figure 3-3 illustrates the remote control connection.

3.11 Auxiliary Output

An auxiliary output of 12V/0.5A is provided.

3.12 Factory Resetting

To restore factory settings, follow these steps: Set the rotary switch to position 1, turn on AC power without remote ON/OFF, and within 15 seconds, rotate the switch between position 1 and 4. A successful reset is indicated by the green LED flashing three times.

4. Communication Protocol

The power supply can be controlled via analog signals (PV, PC, SVR) or digital communication (PMBus or CANBus). Digital communication requires enabling the PM_CTRL/CAN_CTRL setting in SYSTEM_CONFIG and rebooting the unit. Once digital communication is active, analog signals become invalid.

4.1 Charging Curve

The HEP-1000 supports customizable charging curves for various battery types (gel, flooded, AGM, Li-ion). Users can select predefined curves or create their own using commands like CURVE_CONFIG, CURVE_CV, CURVE_FV, and CURVE_CC. Table 4-1 lists the default charging curves for different battery types and models.

Figure 4-1 illustrates the 3-stage charging curve.

4.2 PMBus Addressing and CAN ID setting

Each HEP-1000 unit requires a unique device address for communication. PMBus uses a 7-bit addressing scheme, while CANBus uses a 29-bit identifier. Rotary switches on the top case allow users to set the address (A0, A1).

4.3 PMBus Command List

Table 4-3 provides a comprehensive list of PMBus commands for controlling and monitoring the HEP-1000, including commands for operation, configuration, status reporting, and reading various parameters like voltage, current, and temperature. Commands marked with an asterisk (*) support EEPROM storage functions.

4.3.1 Notes on PMBus

Ensure a minimum 50ms delay between commands. Examples for format conversion are provided for LINEAR16 and LINEAR11 formats.

4.3.3 PMBus Data Range and Tolerance

Table 4-4 and Table 4-5 detail the data ranges and tolerances for display and control parameters via PMBus.

4.4 CANBus Communication Interface

The CANBus interface follows CAN ISO-11898 with a baud rate of 250Kbps. It uses Extended CAN 29-bit identifier frame format or CAN 2.0B. Communication timing specifications, including request period, response time, and packet margin time, are provided. Data frame formats for controller-to-HEP-1000 and HEP-1000-to-controller communication are also outlined.

4.5 CANBus Command list

Table 4-5 lists the CANBus commands for controlling and monitoring the HEP-1000, including commands for operation, voltage/current setting, fault status, and reading various parameters. Data conversion for commands is also explained.

4.5.4 CANBus Value Range and Tolerance

Table 4-7 and Table 4-8 specify the value ranges and tolerances for display and control parameters via CANBus.

5. Notes on Operation

5.1 Wiring for battery

Use RED wire for positive (+) and BLACK wire for negative (-) connections. Ensure correct polarity. Table 5-1 provides suggested wire selection based on AWG and cross-section for different current ratings.

5.2 Derating

The HEP-1000 will automatically derate its output current at lower AC input voltages and higher ambient temperatures to protect itself, as illustrated in Figure 5-1.

5.3 Warranty

MEAN WELL provides a six-year global warranty under normal operation. Any component changes or modifications may void the warranty.

5.4 Suggestion of Battery Capacity

Table 5-2 suggests battery capacities for lead-acid batteries based on the model. Using a larger capacity battery will not cause damage but may increase charging time.

5.5 Troubleshooting

If problems arise, consult the troubleshooting table for possible causes and suggested solutions. Common issues include no output voltage, reverse polarity, over-temperature protection, and LED indicators not turning green. For unresolved issues, contact MEAN WELL or a distributor.