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直流电源的类型

直流电源的类型很多，不同类型的直流电源中，非静电力的性质不同，能量转换的过程也不同。在化学电池（例如干电池、蓄电池等）中，非静电力是与离子的溶解和沉积过程相的化学作用,化学电池放电时,化学能转化为电能和焦耳热在温差电源（例如金属温差电偶、半导体温差电偶）中，非静电力是与温度差和电子的浓度差相的扩散作用，温差电源向外电路提供功率时，热能部分地转化为电能。在直流发电机中,非静电力是电磁感应作用,直流发电机供电时，机械能转化为电能与焦耳热。在光电池中，非静电力是光生伏打效应的作用，光电池供电时，光能转化为电能和焦耳热。 

●设计简单。只需一个电源模块，配上少量分立元件，即可获得电源。●缩短开发周期。模块电源一般备有多种输入、输出选择。用户也可以重复迭加或交叉迭加，构成积木式组合电源，实现多路输入、输出，大大削减了样机开发时间。
 
●变更灵活。产品设计如需更改，只需转换或并联另一合适电源模块即可。
 
●技术要求低。模块电源一般配备标准化前端、高集成电源模块和其他元件，因此令电源设计更简单。
 
●模块电源外壳有集热沉、散热器和外壳三位一体的结构形式，实现了模块电源的传导冷却方式，使电源的温度值趋近于zui小值。同时，又赋予了模块电源规范性的包装。
 
●质优可靠。模块电源一般均采用全自动化生产，并配以高科技生产技术，因此品质稳定、可靠。
 
●用途广泛：模块电源可广泛应用于航空航天、机车舰船、*兵器、发电配电、邮电通信、冶金矿山、自动控制、家用电器、仪器仪表和科研实验等社会生产和生活的各个领域，尤其是在高可靠和高技术领域发挥着不可替代的重要作用。
输出电压的调节

对有TRIM或ADJ(可调节)输出引脚的模块电源产品，可通过电阻或电位器 对输出电压进行一定范围内的调节，一般调节范围为±10%。
 
对TRIM输出引脚，将电位器的中心与TRIM相连，在所有+S、－S管脚的模块中，其他两端分别接+S、－S。没有+S、－S时，将两端分别接到相应主路的输出正负极(+S接+Vin，－S接－Vin)，然后调节电位器即可。电位器的阻值一般选用5～10kΩ比较合适。
 
对ADJ输出引脚，分为输入边调节与输出边调节。输出边调节与TRIM引脚的调节方式一样。输入边调节只能上调输出电压，此时将电位器的其中一端与中心相接，另一端接输入端的地。

I/A Series Advantage Upgrade Paths 
 
From To (Lifecycle Phase) Adv. Upgrade   Part / Model #s Description 
 CP10 FCP270 P270 The Field Control Processor 270 (FCP270) is a distributed, optionally fault-tolerant, field-mounted controller module. The FCP270 performs regulatory, logic, timing, and sequential control together with connected Fieldbus Modules (FBMs). It also performs data acquisition and alarm detection and notification. The FCP270 connects to the MESH control network via standard fiber optic 100 Mbps Ethernet. The fault-tolerant version of the FCP270 consists of two processor modules. These modules install in adjacent FCP270 slots in a baseplate for high speed communication between the modules. The unique and patented fault-tolerant operation of the FCP270 greatly imrpoves reliability relative to other process controllers. The fault-tolerant version of the FCP270 consists of two modules operating in parallel, with two Ethernet connections to the MESH control network. The two FCP270 modules, married together as a fault-tolerant pair, provide continuous operation of the controller in the event of 
 
CP10 ZCP270 P270 The Z-Module Control Processor 270 (ZCP270) is an optionally fault-tolerant, Z-form factor controller. The ZCP270 performs regulatory, logic, timing and sequential control together with connected Fieldbus Communications Modules (FCMs) and Fieldbus Modules. It also performs data acquisition and alarm detection notification. The ZCP270 connects to the MESH control network and FCM 100Ets/FCM100Es via standard fiber optic 100 Mbps Ethernet. The FCM100Et interfaces the 2 Mbps Module Fieldbus used by the 200 Series FBMs and the FCM100E interfaces the 2Mbps Module Fieldbus used by the 200 Series FBMs or the 268 Kbps Fieldbus used by the 100 Series FBMs. Depending on sizing considerations, the ZCP270 can be used with a mix of FCM100E and FCM100Et modules. The fault-tolerant version of the ZCP270 consists of two single-width processor modules. These modules install in adjacent ZCP270 slots in a 1x8 or 2x8 mounting structure and connect to a fault-tolerant connector to allow for high-speed communication 
 
COMM15  + FDSI (Modbus, Profibus, OPC, Data Highway +) S61 The Foreign Device Systems Integrator (FDSI) allows a wide range of choices for users to link non-Foxboro devices into the I/A Series system ZCP & FCP 270 controllers. They area available with serial and Ethernet options, single and redundant links, and have approval ratings for corrosive and explosive environments. Communication channels are galvanically isolated for protection. These rugged, compact modules mount in standard, field-mounted I/A Series baseplates side-by-side with other system input/output Fieldbus Modules (FBMs). Like the other FBMs, their communication with the I/A Series system and controllers is through Foxboro's high-performance (100 Mbps/1Gbps), ultra-high availability