The value of R1, R2, C4, and C5 should be chosen in order to keep at least 12V in Vs. Please connect C4 (>1μF) and C2 (<1μF). ZCT and load resistance RL of ZCT are connected between input pin 1 and 2. Protective resistance (RP=100Ω) must be insurted. RL and amplifier’s output (in Pin 4) regulates sensitivity current External capacitor C1 between pin 4 and GND is used for noise removal. Please connect a varistor or a diode (2 pcs.) to ZCT in parallel, because of when large current is grounded in the primary side (AC line) of ZCT, the following situation can be abandoned: The wave form in the secondary side of ZCT is distorted and some signals do not appear in the output of amplifier. Please connect capacitor (about 0.047μF) between pin 6 and pin 7. Capacitor C6 between pin 1 and GND is about 0.047μF for removing noise.
M54123L EARTH LEAKAGE CURRENT DETECTOR DESCRIPTION The UTC M54123L is a semiconductor integrated circuit with amplifier for a high-speed earth leakage circuit breaker. For the amplifying parts of earth leakage circuit breaker, the UTC M54123L consists of differential amplifier, latch circuit and voltage regulator. In normal operating, the UTC M54123L should be connected to the secondary side of the ZCT (zero current transformers). Here the ZCT detects leakage current different amplifiers’ both input. Then the signals which have been amplified are integrated by an external capacitor. The integrated signal connects to the input terminal of latch circuit whose output is suitable for the characteristics of high- speed earth leakage circuit breaker. Until the input voltage reaches the fixed level, latch circuit doesn’t become high. Then drives a thyristor which is connected to latch circuit’s output terminal. FEATURES * With good input sensitivity current temperature characteristics * High input sensitivity :VT=6.1mV (Typ.) * Only need low external component count * High noise and surge-proof * Low power dissipation :PD=5mW (Typ.) * May be used both as 100V and 200V. * Wide temperature range : from -20 °C to +80°C
MCP2515 Description Microchip Technology’s MCP2515 is a stand-alone Controller Area Network (CAN) controller that implements the CAN specification, version 2.0B. It is capable of transmitting and receiving both standard and extended data and remote frames. The MCP2515 has two acceptance masks and six acceptance filters that are used to filter out unwanted messages, thereby reducing the host MCUs overhead. The MCP2515 interfaces with microcontrollers (MCUs) via an industry standard Serial Peripheral Interface (SPI).
Features • Implements CAN V2.0B at 1 Mb/s: - 0 – 8 byte length in the data field - Standard and extended data and remote frames • Receive buffers, masks and filters: - Two receive buffers with prioritized message storage - Six 29-bit filters - Two 29-bit masks • Data byte filtering on the first two data bytes (applies to standard data frames) • Three transmit buffers with prioritizaton and abort features • High-speed SPI™ Interface (10 MHz): - SPI modes 0,0 and 1,1 • One-shot mode ensures message transmission is attempted only one time • Clock out pin with programmable prescaler: - Can be used as a clock source for other device(s) • Start-of-Frame (SOF) signal is available for monitoring the SOF signal: - Can be used for time-slot-based protocols and/or bus diagnostics to detect early bus degredation • Interrupt output pin with selectable enables • Buffer Full output pins configurable as: - Interrupt output for each receive buffer - General purpose output • Request-to-Send (RTS) input pins individually configurable as: - Control pins to request transmission for each transmit buffer - General purpose inputs • Low-power CMOS technology: - Operates from 2.7V – 5.5V - 5 mA active current (typical) - 1 µA standby current (typical) (Sleep mode) • Temperature ranges supported: - Industrial (I): -40°C to +85°C - Extended (E): -40°C to +125°C
MCP2502X/5X Description The MCP2502X/5X devices operate as I/O expanders for a Controller Area Network (CAN) system, supporting CAN V2.0B active, with bus rates up to 1 Mb/s. The MCP2502X/5X allows a simple CAN node to be implemented without the need for a microcontroller.
The MCP2502X/5X devices feature a number of peripherals, including digital I/Os, four-channel 10-bit A/D (MCP2505X) and PWM outputs with automatic message transmission on change-of-input state. This includes an analog input exceeding a preset threshold.
Features • Implements CAN V2.0B - Programmable bit rate up to 1 Mb/s - One programmable mask - Two programmable filters - Three auto-transmit buffers - Two message reception buffers - Does not require synchronization or configuration messages • Hardware Features - Non-volatile memory for user configuration - User configuration automatically loaded on power-up - Eight general-purpose I/O lines individually selectable as inputs or outputs - Individually selectable transmit-on-pinchange for each input - Four 10-bit, analog input channels with programmable conversion clock and VREF sources (MCP2505X devices only) - Message scheduling capability - Two 10-bit PWM outputs with independently programmable frequencies - Device configuration can be modified via CAN bus messages - In-Circuit Serial Programming™ (ICSP™) of default configuration memory - Optional 1-wire CAN bus operation • Low-power CMOS technology - Operates from 2.7V to 5.5V - 10 mA active current, typical - 30 µA standby current (CAN Sleep mode) • 14-pin PDIP (300 mil) and SOIC (150 mil) packages • Available temperature ranges: - Industrial (I): -40°C to +85°C - Extended (E): -40°C to +125°C
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