概览

简介

虽然机械式电表坚固耐用,甚至在现代市场上也占据了主导地位,但由于对自动抄表 (AMR) 功能的需求不断增长,加上对篡改尝试的敏感性的要求降低,推动了具有远程数据采集和处理功能的电子式电能表的发展。 后面提到的仪表被称为“智能电表”,而无 AMR 功能的纯电子式电能表被称为“静态表”。

因此,相较于智能电表,低成本对于单相电子式静态表更为重要,尤其是在成本竞争力要求方面,因为部件的最终选择是由两个参数推动的:功率消耗和成本效率。 这是一个优化了功耗和成本的单相电子式电能表解决方案。

系统优势:

  • B 级 (1%),16 位计量 MCU
  • 单输出低压降稳压器 (LDO),能够输出高达 500mA 的输出电流。
  • 5V 电源 RS-485,单收发器,满足针对平衡通信传输的 RS-485 标准的要求。
  • 光耦合隔离器,包含砷化镓 (GaAs) 发光二极管和 NPN 硅光电晶体管,可通过几 kΩ 的高负载电阻实现相对较高的开关速度

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4:3 ratio Sheet.1 Sheet.2 Sheet.3 Sheet.4 EU087 EU087 EU087 Sheet.35 Sheet.36 Sheet.37 Sheet.38 Sheet.39 Sheet.40 Sheet.42 Sheet.43 Sheet.45 Sheet.46 Sheet.47 Sheet.48 Sheet.49 Sheet.50 Sheet.51 Sheet.52 Sheet.53 Sheet.54 Sheet.55 Sheet.56 Sheet.58 Sheet.60 Sheet.61 Sheet.62 Sheet.63 Sheet.64 Sheet.67 Sheet.68 Sheet.74 Sheet.75 Sheet.76 Sheet.77 Sheet.78 Sheet.79 Sheet.80 Sheet.81 Sheet.82 Sheet.83 Sheet.84 Phase, 700V Peak Phase, 700V Peak Phase, 700V Peak Neutral Neutral Neutral Isolated Output +Ground Isolated Output +Ground Isolated Output +Ground VOUT = 5V, IOUT, max=600mA VOUT = 5V, IOUT, max=600mA VOUT = 5V, IOUT, max=600mA Although the reference design is based on a Shottky diode (lower forward voltage), a standard diode may be alternatively used due to lower reverse current. Although the reference design is based on a Shottky diode (lo... Although the reference design is based on a Shottky diode (lower forward voltage), a standard diode may be alternatively used due to lower reverse current. 3.3V 3.3V 3.3V Primary Battery Primary Battery Primary Battery SuperCap (Optional) SuperCap (Optional) SuperCap (Optional) Shunt Shunt Shunt Load Load Load 3.8V 8.5mA max 3.8V 8.5mA max 3.8V 8.5mA max Sheet.98 Sheet.100 5V, 3x 5mA max 5V, 3x 5mA max 5V, 3x 5mA max RxD RxD RxD TxD TxD TxD DIR DIR DIR 3 (4) 3 (4) 3 (4) 3 (4) Sheet.108 2 2 2 2 Sheet.111 3.3V, 15mA max 3.3V, 15mA max 3.3V, 15mA max Neutral Neutral Neutral Connector 1.166 Connector 1.166.115 Sheet.117 Connector 1.166.118 VOUT = 3.8V, IOUT, max=150mA VOUT = 3.8V, IOUT, max=150mA VOUT = 3.8V, IOUT, max=150mA Connector 1.166.120 Battery Li-ion.167 Sheet.122 Sheet.123 Sheet.124 Sheet.125 Sheet.126 Sheet.127 Sheet.128 Diode - Zener Sheet.139 Sheet.140 Sheet.141 Connector 1.166.142 Diode - Zener.143 Sheet.144 Sheet.145 Sheet.146 Capacitor Polaized Sheet.148 Sheet.149 Sheet.150 Sheet.151 Ground - Signal Sheet.154 Sheet.155 Sheet.156 Sheet.157 Connector 1.166.158 Ground - Signal.159 Sheet.160 Sheet.161 Sheet.162 Sheet.163 Resistor - Fixed Resistor - Fixed.165 Resistor - Fixed.166 Resistor - Fixed.167 Sheet.168 Connector 1.166.169 Connector 1.166.170 Connector 1.166.171 Sheet.172 Sheet.173 Connector 1.166.174 Connector 1.166.175 Connector 1.166.176 Sheet.177 Connector 1.166.178 Connector 1.166.179 Connector 1.166.180 Connector 1.166.181 Sheet.182 18 x 8 18 x 8 18 x 8 Connector 1.166.199 Connector 1.166.202 Connector 1.166.203 5V, 0.9mA max 5V, 0.9mA max 5V, 0.9mA max Sheet.205 RL78/I1C Alternative: RL78/I1B MCU MCU Vbat Vbat Vbat VRTC VRTC VRTC VDD VDD VDD GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO GP/IO UART UART UART SPI SPI SPI IrDA IrDA IrDA LCD LCD LCD 24-bit Σ∆ 24-bit Σ∆ 24-bit Σ RS-485 Transceiver RS-485 Transceiver RS-485 Transceiver Flyback Flyback Flyback LDO LDO LDO Photocoupler 1 Photocoupler Photocoupler Photocoupler 2 Photocoupler Photocoupler Photocoupler 3 Photocoupler Photocoupler Serial NOR Flash Serial NOR Flash Serial NOR Flash IrDa Connector IrDa Connector IrDa Connector Case Switch Case Switch Case Switch Custom LCD Custom LCD Custom LCD Terminal Switch Terminal Switch Terminal Switch Menu Push Button Menu Push Button Menu Push Button Protection + Filtering Protection + Filtering Protection + Filtering
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