6 5 4 3 2 1 C34 10pF R20 0 IIN2 1 2 C27 C28 C29 C30 0 0 R29 C15 22nF VCC VREF1 VREF2 GND_REG GND_REG VDDD GNDD VDDA GNDA 0 R90 1k IIP3 VIP3 VIN3 IIP3 IIN3 R26 VIN3 R25 6.8 10nF C18 1k R27 R30 0 9 10 11 12 13 14 IIN3 0 R32 22 CON14 CLKOUT/ZCR LED1 VIP1 LED2 VIN1 INT1 IIP1 INT2 STPM33 IIN1 EN IIN2 SYN IIP2 SCS SCL MOSI/RXD MISO/TXD U1 2 3 15 16 24 25 R28 I_CLK_MTR A 1 4 5 6 7 8 28 29 30 31 32 O_ZCR2 O_LED3 O_LED4 O_INT2 C6 100nF R43 100 I_SCS2 I_SCL I_MOSI O_MISO' I_SCL I_SYN 1 C1 O_MISO 20k R82 O_INTCB R59 I_SCS1 3 2 1 20k SIP-3PIN +3.3V 1. If CT is 2500:1, the value of R11,R13 and R25 is 6.8. 1. If CT is 3000:1, the value of R11,R13 and R25 is 8.2. 3. I_SYN is high when power on. Metrology Part J1 SIP-3PIN Q3 R57 CON18 I_SCS2 J2 20k VR3 O_MISO' 1 3 5 7 9 3 2 1 A C CON16 2 4 6 8 10 BC847BLT1 TP6 16MHz 20pF C35 2.2uF C37 100nF C36 I_MOSI Y1 O_INT2 10uF U8 0 3 R84 100 C9 220pF VR1 VR2 22 R45 2 I_EN I_SYN TP1 CON17 R54 I_16MCLK HEADER-5X2POL B CON15 + 23 17 19 18 22 27 26 21 20 VIP3 1 2 CON12 1 0 R56 VOUT 2 +3.3V' TP3 IO_SWIM C 32 31 30 29 28 27 26 25 300k C2 20pF 300k 0 R40 100nF 0 R85 B CON11 R91 1k I_NRST 33 300k CLKIN/XTAL2 XTAL1 NC NC NC NC R52 R23 300k R51 R22 300k R24 R21 300k 1.2k 1 2 R35 1uF C32 C38 R18 +3.3V C 100nF +3.3V O_MISO' 10nF C13 TP2 22 R93 100 C7 220pF I_SCS2 O_LED4 I_CTS_STM8 VIN2 1k R17 CON10 D GND I_EN I_SYN I_SCS1 I_SCL I_MOSI O_MISO I_RX_STM8 O_TX_STM8 R31 I_CLK_MTR R11 6.8 0 VIN 20k R92 O_RTS_STM8 IIP2 R12 C11 100nF 100 R83 O_LED2 O_Q_LED 1 2 3 4 5 6 7 8 PD7/TLI[TIM1_CH4] UART1_RX/PD6 UART1_TX/PD5 BEEP/TIM2_CH1/PD4 TIM2_CH2/ADC_ETR/PD3 TIM2_CH3/PD2 SWIM/PD1 TIM1_BKIN/CLK_CCO/PD0 0 R88 1k O_ZCR1 O_LED1 O_LED2 O_INT1 O_INT1' NRST OSCIN/PA1 OSCOUT/PA2 VSS VCAP VDD SPI_NSS/TIM2_CH3/PA3 PF4 O_P_LED 9 PB7 I_SCS1 10 PB6 I_SYN 11 I2C_SDA/PB5 O_INTCB 12 I2C_SCL/PB4 13 TIM1_ETR/AIN3/PB3 14 TIM1_CH3N/PB2 15 TIM1_CH2N/PB1 16 TIM1_CH1N/PB0 C10 22nF 1 4 5 6 7 8 28 29 30 31 32 +3.3V 300k R19 CLKOUT/ZCR U9 LED1 LED2 INT1 STPM34 INT2 EN SYN SCS SCL MOSI/RXD MISO/TXD 100nF 300k VIP1 VIN1 IIP1 IIN1 IIN2 IIP2 VIN2 VIP2 C31 300k VIP2 9 10 11 12 13 14 15 16 4.7uF R49 R9 300k R47 R8 300k R10 R7 300k CON3 R89 TP4 10uF 3.3V Power Supply 33 VIP1 VIN1 IIP1 IIN1 IIN2 IIP2 VIN2 VIP2 100nF R14 0 1.2k C 100nF C42 U15 LED Part 1uF 0 IIN1 CON2 1 2 10uF O_Q_LED LED RED 23 17 19 18 22 27 26 25 21 20 R6 2 CLKIN/XTAL2 3 XTAL1 24 NC 10nF C8 1k R16 B C39 D3 K C41 ISO_5V C40 A 100uF/6.3V VIN1 0 1 2 C23 TP5 O_P_LED LED RED +3.3V R13 6.8 R87 C22 +3.3V K 1k R36 IIP1 R15 CON1 C21 C20 VCC VREF1 VREF2 GND_REF GND_REG VDDD GNDD GNDD VDDA GNDA 0 R86 1 2 1k 100nF A C25 C5 22nF 100nF R5 1.2k C24 300k 4.7uF 300k 100nF R46 R33 R4 300k 100nF 300k 100nF D 300k C14 LED Green D2 VIP1 100nF 300k R3 R2 R1 A K 3 A +3.3V' 1k R34 D1 STM8S003K3 SPI_MISO/PC7 SPI_MOSI/PC6 SPI_SCK/PC5 TIM1_CH4/CLK_CCO/PC4 TIM1_CH3/PC3 TIM1_CH2/PC2 TIM1_CH1/UART1_CK/PC1 SPI_NSS/PE5 24 23 22 21 20 19 18 17 R37 100 100 R38 R39 100 I_CLK_MTR O_ZCR2 O_ZCR1 O_LED1 R41 4.7k +3.3V O_LED3 A R42 4.7k B I_SCL I_MOSI O_MISO I_EN O_INT1 O_INT1' O_MISO_STM8 I_MOSI_STM8 I_SCK_STM8 Metrolog MCU 5 R61 +3.3V C62 100nF C63 6 VCC 5 VO 4 10pF 3 I_MISO_MCU O_MOSI_MCU O_SCK_MCU 150 TLP2368 I_16MCLK D 4 3V3 1 R50 330 3 O_16MCLK 2 1 3 5 7 9 MOSI MISO CLK NSS GND GND0 2 4 6 8 10 O_16MCLK 3V3 GND0 330 GND0 I_CTS_USB R63 CON9 Main MCU port U10 16M GND GND VCC INT 1 C47 100nF 6 D Isolation 16M clock 1 3V3 2 VOUT 3 16MHz 2 +5V C57 C56 GND0 1k K LED Green GND0 C R48 +5V O_TX_USB 4.7k STM8_RXD R44 O_TX_485 4.7k R58 BC857BLT1 GND0 GND0 +5V LED Red D6 K A Q4 BC857BLT1 O_TX_485 Q2 I_RX_USB 4.7k 4.7k LED Green GND0 SMBJ6.0CA U7 1 2 3 4 RO RE DE DI VCC B A GND R79 R80 GND0 ST485B/C/ERB BC857BLT1 8 7 6 5 CON6 D7 A GND0 C61 100nF Y2 TP9 2 GND 1 VIN 5 -VO 7 +VO C55 A 10k D5 K GND0 U18 GND0 D4 PTC2 PTC1 2 1 B SMBJ6.0CA D8 100nF GND +5V C53 100nF C66 3V3 R76 4.7k I_CTS_USB I_RX_USB O_RTS_USB STM8_RXD GND0 330 R70 16 15 14 13 12 11 10 9 R71 VDD2 GND2 VOA VOB VIC VID CTRL2 GND2 100nF 4.7k B 100nF VDD1 GND1 VIA VIB VOC VOD CTRL1 GND1 +5V 10uF GND0 NN105S05H6 U22 GND0 GND0 GND0 100nF C46 U2 10uF I_RX_USB O_RTS_USB I_CTS_USB +5V C67 O_RTS_STM8 O_TX_STM8 I_CTS_STM8 I_RX_STM8 1 2 3 4 5 6 7 8 FT232BL 100nF ISO_5V Q1 +5V ADUM1412 24 23 22 21 20 19 18 17 RXD RTS# CTS# DTR# DSR# DCD# RI# GND 330 +3.3V +3.3V C48 33nF C44 VIN GND0 R77 C52 100nF 10uF GND0 C12 R78 4.7k 10K R69 GND0 EESK U6 EEDATA VCC RESET# RSTOUT# 3V3OUT USBDP USBDM C43 100nF R60 +5V EECS TEST AVCC AGND XTOUT XTIN VCC TXD 32 31 30 29 28 27 26 25 Bead FB3 Isolation SPI 1 2 3 4 5 6 7 8 27 R65 +5V O_TX_USB GND SLEEP# RXLED# TXLED# VCCIO PWRCTL PWREN# TXDEN 27 R64 9 10 11 12 13 14 15 16 1 2 3 4 10K R67 CON4 V+ DD+ GND TP8 C45 GND0 R68 470 C58 100nF 10uF Bead FB1 C51 C49 100nF 100nF TP7 2.2nF/400VAC C54 100nF GND0 U14 +3.3V C64 +5V 1.5K R66 GND0 C50 100nF C3 100nF 3 I_MISO_MCU O_MOSI_MCU O_SCK_MCU USB Type B female GND1 CTRL1 VOD VIC VIB VIA GND1 VDD1 GND0 5 SH1 6 SH2 C GND2 CTRL2 VID VOC VOB VOA GND2 VDD2 8 7 6 5 4 3 2 1 C4 3V3 9 10 11 12 13 14 15 16 O_MISO_STM8 I_MOSI_STM8 I_SCK_STM8 100nF C65 3V3 ADUM1411 LD1117S33CTR +5V 2 1 GND0 100nF +3.3V CON13 1 Power Supply +5V Isolation USB and RS485 USB Part RS485 Part 3V3 100nF GND0 C60 A 2k 100nF C59 R81 IO_SWIM I_NRST 2k Isolation SWIM Part R62 5 6 BGND 7 BSCL 8 BSDA BVDD 2k SI8400AB-B-IS 4 AGND 3 ASCL 2 ASDA 1 AVDD R72 +3.3V 1 2 3 4 U3 VDD DATA GND RESET CON5 1k 1 2 K1 1 2 1k R73 MCU Reset Key R74 O_Q_LED 4.7k GND0 1 2 O_P_LED SWIM4P LED pulses output R75 U11 4 3 TLP781 U12 4 3 TLP781 1 2 CON8 A 1 2 CON7