ER-JB-7200D
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The ER-JB-7200D is an encoder designed by Okuma. As part of the Absolute Encoders series, it operates within a voltage range of 24V DC to 48V DC and features incremental encoder feedback with Hall sensors. It has a protection class of IP20 and a maximum mechanical speed of 7500 rpm.
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Product Description:
The ER-JB-7200D absolute encoder is used for accurate rotary position measurement in various automation applications. Manufactured by Okuma, this encoder features a hollow shaft that allows direct coupling to the driven shaft. This design eliminates the need for intermediate couplings, and positional accuracy is improved with reduced mechanical slack.
The structure of this encoder’s shaft is designed to accommodate stable long-term operation under steady load conditions. This encoder is equipped with a dual metal flange with a 3-point mounting system to provide a secure mechanical installation and resist vibrations during high-speed operations. The dimensions of this encoder are 10×10×10 inches, and it weighs 5.00 lbs. This indicates the encoder’s solid internal build and stable form factor, suitable for integration into a wide range of machines. The ER-JB-7200D encoder functions stably in a temperature range of 0–40 degrees Celsius and can be deployed in standard industrial environments. For accurate internal timing, this encoder has a crystal oscillator XT1, which is used to generate clock signals necessary for synchronized data processing. The microcontroller ERJ0102 of this encoder is responsible for control logic and signal conversion. The primary IC unit HD6435208A81CP, a high-performance processor, ensures fast and accurate interpretation of rotary data.
This encoder’s interface for power and data is managed through CN1 connector pins (such as pin 8 and K) for easy wiring and integration into host systems. These pins provide both electrical power and digital communication routes between the system controller and the encoder. The electronics of the ER-JB-7200D encoder are mounted on PCB type E4809-820-013, as it has minimal size and retains efficient signal routing. Internally, this encoder features a 10μF / 25V electrolytic capacitor that ensures smooth voltage and power stability.
Frequently Asked Questions about ER-JB-7200D:
Q: How does the crystal oscillator XT1 benefit the ER-JB-7200D Absolute Encoder?
A: The XT1 oscillator ensures consistent MCU timing for accurate signal processing. It helps maintain synchronization in high-speed encoder applications.
Q: Why is a hollow shaft used in the ER-JB-7200D instead of a solid one?
A: The hollow shaft allows direct coupling with the drive system. This reduces alignment errors and minimizes rotational backlash.
Q: What role does the dual metal flange play in encoder stability?
A: It provides firm structural support and reduces vibration during high-speed rotations. The 3-point mount ensures consistent encoder alignment over time.
Q: How does the 10μF / 25V electrolytic capacitor improve performance in ER-JB-7200D?
A: It stabilizes internal voltage levels during signal load variations. This prevents data loss and ensures uninterrupted encoder feedback.
Q: What is the advantage of using PCB type E4809-820-013 in this encoder?
A: The PCB offers efficient signal routing and high component density. It reduces internal noise and improves EMI performance in ER-JB-7200D.
