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3BSE003911R0001控制逻辑主板
一般操作电压和电流控制（本地和远程）分别设置输出电压和电流的边界限制。负载电阻与控制设置的关系决定了电源是在恒压模式还是恒流模式下运行。模式之间的自动交叉在以下负载电阻值下发生：负载电阻（欧姆）=电压控制设置（伏特）电流控制设置（安培）负载电阻越高，电源在恒压模式下工作，在恒流模式下工作电阻越低。操作模式该电源的设计应确保其操作模式是通过在端子排TB3上的端子之间进行捆扎连接来选择的，端子板TB3用螺栓固定在电源的后面板上。端子名称为丝印在电源后面板上。（请参阅下表）。正常操作（图1）出厂时，每个电源配置为恒定/电压、恒定/电流、本地编程、本地传感、单机组操作模式。这种正常操作模式通常用于大多数应用程序。除非另有说明，否则所有性能规范均在此配置中定义。纹波、编程速度、瞬态响应和稳定性都通过这样配置的电源进行了优化。连接负载必须使用单独的一对连接线将每个负载连接到电源输出端子。这将最小化负载之间的相互耦合效应，并将充分利用电源的低输出阻抗。如果存在强交流或射频场，则每对连接线必须尽可能短，并绞合或屏蔽，以减少噪声拾取。（如果使用屏蔽线对，将屏蔽线的一端连接到电源处的接地，另一端保持断开。）
遥感（图2）
在直流负载线压降（IR）会对负载性能产生不利影响的应用中，可以检测负载而不是输出端子的电压。因此，遥感将消除通过配电系统的负载电流变化的影响。然后，最大可用负载电压等于额定电源输出电压减去总IR降。遥感连接1.拆除以下端子之间的跳线：TB3-1和2 TB3-7和8 2.将负载的正极连接到TB3-2。3.将负载的负极连接到TB3-7或6.4.如果负载的引线约为5英尺或更长，可能需要在负载上连接电容器；或TB3-1和TB3-2之间的电容器，加上TB3-7和TB3-8。在100-100000mfd范围内。为了保护系统免受开路引线的影响，应在TB3-1和TB3-7和TB8之间安装一个100W½W 5%的电阻器。因为如果出现问题，每个应用程序可能不同，请咨询工厂。注意：由于电压表内部连接到感测端子，它将自动指示负载电压，而不是电源输出端子电压。远程编程该电源可通过使用外部电阻以远程编程模式（外部控制）操作。将电源的编程端子连接到远程编程设备的电线应绞合，如果存在强交流或射频场，则应屏蔽。
GENERAL OPERATION
The voltage and current controls (local and remote) set the boundary limits for the output voltage and current respectively. The relationship of load resistance to control settings determines whether the power supply is operating in constant voltage or constant current mode. Automatic crossover between modes occurs at the following load resistance value: Load resistance (Ohms) = Voltage Control Setting (volts) Current Control Setting (amperes) At higher load resistance, the power supply operates in the constant-voltage mode and at lower resistance in the constant-current mode.MODES OF OPERATION This power supply is designed so that its mode of operation is selected by making strapping connections between terminals on terminal strip TB3 which is bolted to the rear panel of the power supply. The terminal designations are silk-screened on the rear panel of the power supply. (Refer to the following chart).NORMAL OPERATION (FIGURE 1) When shipped from the factory, each supply is configured for constant/voltage, constant/current, local programming, local sensing, single unit mode of operation. This normal mode of operation is usually used in most applications. All performance specifications unless otherwise stated are defined in this configuration. Ripple, programming speed, transient response and stability are optimized with the supply so configured.Connecting Load Each load must be connected to the power supply output terminals using separate pairs of connecting wires. This will minimize mutual coupling effects between loads and will retain full advantage of the low output impedance of the power supply. Each pair of connecting wires must be as short as possible and twisted or shielded if strong AC or RF fields are present to reduce noise pickup. (If a shielded pair is used, connect one end of the shield to ground at the power supply and leave the other end disconnected.)
REMOTE SENSING (FIGURE 2)
In applications where the effect of the voltage drop (IR) of the DC load wires would adversely affect the performance of the load it is possible to sense the voltage at the load instead of the output terminals. Remote sensing will therefore remove the effect of changes in load current through the power distribution system. The maximum available load voltage then equals the rated power supply output voltage less the total of the IR drop. Connections for Remote Sensing 1. Remove jumpers between the following terminals: TB3-1 and 2 TB3-7 and 8 2. Connect the positive point of load to TB3-2. 3. Connect the negative side of the load to TB3-7 and 6. 4. If the leads to the load are approximately 5 feet or more it may be necessary to connect a capacitor across the load; or capacitors between TB3-1 and TB3-2 plus TB3-7 and TB3-8. Within the range of 100-1000mfd. To protect the system from open sense leads, a 100W ½ Watt 5% resistor should be installed between TB3-1 & 2 and TB3-7 & 8. Because each application can be different consult factory if problems occur. NOTE: Since the voltmeter is internally connected to the sensing terminals, it will automatically indicate the voltage at the load, not the power supply output terminal voltage.REMOTE PROGRAMMING This power supply may be operated in a remotely programmed mode (externally controlled) by the use of an external resistance. The wires connecting the programming terminals of the supply to the remote programming device should be twisted or if strong AC or RF fields are present, shielded.
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