A7-20384-1
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The A7-20384-1 servo drive board is constructed from ASTM A36 steel with a zinc-plated finish, has an overall length of 146 mm, a maximum load capacity of 1500 kg, and weighs 0.8 kg. Part of the PRS Servo Drive Boards series manufactured by Sanyo Denki, it offers a temperature range from -40°C to 80°C.
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Product Description:
The A7-20384-1 Servo Drive Board is a dedicated control and interface module designed by Sanyo Denki for use in precision motor control applications as it is designed to manage signal processing, logic control and power switching for servo systems. It supports programmable logic operations that align with typical industrial automation requirements and it connects to broader control systems through a large D sub I/O connector.
The A7-20384-1 Board presents a custom microcontroller and dedicated ROM chips that allows it to execute specific firmware instructions and its overall design supports direct integration into control panels and machine enclosures through standard mounting points. It has a logic voltage of +5V DC and supports external power input in the range of 12V to 24V DC for its output drivers and it features three TO 220 transistors that are mounted on an aluminum heatsink. Its output current capability is rated between 1A to 5A per channel depending on the load and thermal dissipation and it includes a quartz crystal oscillator that provides timing control for the main processor. It comes with a PMM 671185 processor that works in coordination with two ROM MULTI C chips for firmware access and its calibration is available using two multi turn trimpots labeled VR1 and VR2 that allow analog threshold tuning.
This PRS series servo drive 8 position DIP switch is located at the top right that provides mode or address selection and it also uses SIP resistor packs labeled SH20xx that manage input conditioning along with multiple axial resistors rated at 1/4 watt. The module incorporates one 100μF 50V electrolytic capacitor and several film capacitors that handle filtering and voltage smoothing and its connection options include a large blue D sub I/O connector and a black Molex style header for auxiliary signals or power lines.
Frequently Asked Questions about A7-20384-1:
Q: Why does the A7-20384-1 board include SIP resistor packs for input conditioning?
A: The SIP resistor packs reduce signal noise and provide impedance control. This ensures cleaner digital input recognition and prevents false triggering during operations.
Q: How do the TO-220 transistor packages benefit the A7-20384-1 Servo Drive Board?
A: These packages provide reliable high-current switching. Their metal tab design aids in effective heat dissipation when mounted to the heatsink.
Q: What is the function of the DIP switch on the A7-20384-1 board?
A: The DIP switch configures operating modes or addressing options. This allows the board to be uniquely identified in multi-board configurations.
Q: Why does the A7-20384-1 use a quartz crystal oscillator with the PMM processor?
A: The crystal provides a stable and precise clock signal. This ensures accurate timing for logic execution and communication cycles.
Q: How does using ROM-based firmware in the A7-20384-1 benefit system reliability?
A: ROM chips prevent accidental overwrites of firmware. They offer consistent performance even during power cycles or unexpected shutdowns.
