Model 1693, 1694 Switching DC Power Supply INSTRUCTION MANUAL
1 Safety Summary The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation, service, and repair of this instrument. Before applying power, follow the installation instructions and become familiar with the operating instructions for this instrument. GROUND THE INSTRUMENT To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical ground.
WARNINGS AND CAUTIONS WARNING and CAUTION statements, such as the following examples, denote a hazard and appear throughout this manual. Follow all instructions contained in these statements. A WARNING statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in injury or death to personnel.
Compliance Statements Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems) This product is subject to Directive 2002/96/EC of the European Parliament and the Council of the European Union on waste electrical and electronic equipment (WEEE), and in jurisdictions adopting that Directive, is marked as being put on the market after August 13, 2005, and should not be disposed of as unsorted municipal waste.
Contents 1 2 3 Safety Summary ........................................................................................ 1 Introduction .............................................................................................. 5 Installation ................................................................................................ 6 3.1 Initial Inspection................................................................................ 6 3.2 Input Power Requirements ..................................
2 Introduction B&K Precision models 1693 and 1694 switching mode DC power supplies provide high current output in a lightweight and compact package. It is suitable for a variety of uses, especially for powering DC operated mobile radio equipment on the bench. These 900W power supplies provide a variable voltage output from 1 V to 15 V at 60 A (model 1693) or from 1 V to 30 V at 30 A (model 1694).
3 3.1 Installation Initial Inspection This unit is tested prior to shipment. It is therefore ready for immediate use upon receipt. The initial physical inspections should be made to ensure that no damage has been sustained during shipment. Inspect the packing box on receipt for any external damage. If any external damage is evident, remove the instrument and visually inspect its case and parts for any damage.
4 Controls and Indicators 4.1 Front Panel Figure 1 - Front Panel (1) Voltage and Ammeter LED Display (2) Overload LED Indicator – Overload (Constant Current Limiting) and ShortCircuit Protection (3) Output Voltage Control Knob – Control Both Main and Auxiliary Output (4) Power ON/OFF Switch (5) Power ON/OFF LED (6) Auxiliary Output Terminal (max 5 A for 1693, max 3 A for 1694) Note: Please see Section 5.2 for more details on using both main and auxiliary output terminals together.
4.2 Rear Panel Figure 2 - Rear Panel (7) Main Output Terminal (rated 60 A for 1693 / 30 A for 1694) Note: Please see Section 5.2 for more details on using both main and auxiliary output terminals together.
5 Operating Instructions Safety Precautions ● Never short the remote sensing terminal. ● This power supply is for indoor use only. ● Do not expose the power supply to sun, high humidity, or dusty environments. ● Never remove the metal cover of the power supply while AC power is connected. ● Never touch the unit when your hands are wet. ● Never block the ventilation slots and cooling fan air intake window. ● Never attempt to repair the power supply.
5.1 1. Instrument Hook-Up Check the rating label of the power supply and make sure it complies with your AC mains voltage. Connect the power supply to the AC mains using the provided power cord. CAUTION: The AC input is double pole fusing. 2. If you do not use the analog remote control feature, make sure the remote control ON/OFF switch on the rear panel is in the OFF position. For analog remote control procedures, please refer to Section 5.4. 3.
5.2 Using Both Main and Auxiliary Outputs The 1693 and 1694 both have a main and auxiliary output that can be used separately or together. The voltage control knob will adjust the output voltage for both of these output terminals and they will output the same voltage. When using both the main and auxiliary outputs together, the power supply will automatically total the currents supplied to both terminals up to the current limit of the power supply and show the total current on the display.
2. Check and make sure the power connections are secure. 3. Then make connections between Remote Sensing and equipment. Figure 3 shows typical connection between power supply and device for remote sense operation. Figure 3 - Remote Sense Connection The remote sensing wire should be at least 22AWG wire size. 5.3.2 Disconnection WARNING: Wrong disconnect sequence will damage the power supply. 1. Disconnect the remote sensing connections. 2.
Figure 4 - Remote Control Connector (b) Solder 3 wires (22AWG) to pins 1, 2, and 3 of pin plug as shown in Figure 5. Figure 5 - Pin Numbers (c) Make sure the load is disconnected and the power supply is OFF before continuing to the next step. Otherwise, power supply may be damaged. (d) Plug the remote connector plug into the remote control terminal of the power supply. (e) Secure the remote connector plug to the terminal socket by locking connector ring (Figure 6).
Figure 6 - Connector Ring Then, you can choose either method A or B below to use the analog remote control feature. Method A: Using an External Variable DC Voltage Source A variable external voltage source of 0 to 5 V is fed into the analog remote control terminal to adjust the output voltage level of both Main and Auxiliary outputs. WARNING: Do not input higher than 5 V, otherwise the overvoltage protection (OVP) will be triggered. 1. Make sure the load is disconnected and the power supply is OFF. 2.
Method B: Using a 5 kΩ Variable Resistor 1. Make sure the load is disconnected and the power supply is OFF. 2. Prepare a 5 kΩ variable resistor and connect wires from pins 1, 2, and 3 as shown in Figure 7. Figure 7 - Variable Resistor Connection 3. Turn the remote control ON/OFF switch to ON position. 4. Switch on the power supply. 5. Adjust the 5 kΩ variable resistor from one end to the other to check and verify the full output voltage range of the power supply. 6. Switch off the power supply. 5.4.
6 6.1 Maintenance When the Unit is Not Turning On Check if the power ON/OFF switch is turned ON. If not, then check the power cord. Please make sure that the power cord is properly connected to the unit. Please also check the main switch and ensure that the AC supply at your site is the same as the one mentioned at the rear chassis of the unit. Check for a blown fuse. 6.2 Fuse Replacement If the fuse blows, the LED will not light and the instrument will not operate.
Figure 8 - Fuse Location 6.3 Instrument Repair Service Because of the specialized skills and test equipment required for instrument repair and calibration, many customers prefer to rely upon B&K Precision for this service. We maintain a network of B&K Precision authorized service agencies for this purpose. To use this service, even if the instrument is no longer under warranty, follow the instructions given in the Warranty Service section of this manual.
7 Specifications 1693 1694 1-15 V 1-30 V Rated Main Output Current 60 A 30 A Rated Auxiliary Output Current 5A 3A Output Variable Output Voltage Ripple and Noise 40 mVpp Load Regulation 0.1% + 5 mV Line Regulation 0.05% + 3 mV Meter Type & Accuracy Voltmeter 3-digit LED display ± 1% + 1 count Ammeter 3-digit LED display ± 1% + 1 count Other Input Voltage Dynamic Power Factor Correction 100-240 VAC, 50 Hz/60 Hz > 0.
1693 Protections Special Features Operating Temperature Dimension (W x H x D) 1694 Overload (Constant Current Limiting), Short Circuit, OTP (Overtemperature Protection), and OVP (Overvoltage Protection) Remote control and remote sensing 32 °F to 104 °F (0 °C to 40 °C) 8.66” x 4.33” x 14.17” (220 x 110 x 360 mm) Weight Supplied Accessories 12.8 lbs (5.
8 Certification CE Compliant CE Declaration of Conformity The power supply meets the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC Electromagnetic Compatibility Directive. Low Voltage Directive - EN60950 o Safety requirements for electrical equipment for measurement, control, and laboratory use. EMC Directive - EN 55022 o Electrical equipment for measurement, control, and laboratory use.
9 Service Information Warranty Service: Please go to the support and service section on our website at www.bkprecision.com to obtain an RMA #. Return the product in the original packaging with proof of purchase to the address below. Clearly state on the RMA the performance problem and return any leads, probes, connectors, and accessories that you are using with the device. Non-Warranty Service: Please go to the support and service section on our website at www.bkprecision.com to obtain an RMA #.
10 Limited One-Year Warranty B&K Precision Corp. warrants to the original purchaser that its products and the component parts thereof will be free from defects in workmanship and materials, for a period of one year from date of purchase. B&K Precision Corp. will, without charge, repair or replace, at its option, defective product or component parts. Returned product must be accompanied by proof of the purchase date in the form of a sales receipt. To obtain warranty coverage in the U.S.A.
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