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Allen Bradley Bulletin 817 817-UD

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817-UD

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The 817-UD from Allen Bradley’s Bulletin 817 is a thermistor relay designed for reliable temperature monitoring. It operates with a coil voltage of 110 VAC and supports both manual and automatic reset functions. This model incorporates a robust design for panel or DIN rail mounting, ensuring ease of integration in various setups.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 817-UD

ManufacturerAllen Bradley
Product TypeThermistor Relay
Product LineBulletin 817
Part Number817-UD
Coil Voltage110 VAC
Rated Current5 A
Reset TypeManual/Auto
Frequency50/60 Hz
MountingPanel/DIN
Terminal TypeScrew
Contacts1 NO/1 NC
Input TypeThermistor Sensor
EnclosureOpen Style
Response TypeOvertemp Trip
IndicatorStatus LED
Insulation Voltage250 V
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The Allen Bradley 817-UD is a versatile thermistor relay, ideal for monitoring temperature conditions in different environments. Designed to operate at a coil voltage of 110 VAC, this relay is capable of sustaining a current up to 5 amps. It is compatible with both 50 Hz and 60 Hz frequency ranges, providing flexibility across various applications.

The 817-UD has a manual and automatic reset feature, allowing operators to choose the most suitable method for their needs. For mounting convenience, it can be securely installed on either a panel or a DIN rail, adapting easily to diverse installation requirements. Connections are facilitated through screw-type terminals, promoting robust and reliable wiring.

An input from a thermistor sensor enables this relay to effectively monitor temperature levels. The enclosure is designed as open style, contributing to efficient heat dissipation during operation. The 817-UD is built with one normally open (NO) and one normally closed (NC) contact for versatile circuit integration. Additionally, an LED indicator is included to provide real-time status updates for quick assessment of the unit’s performance. With an insulation voltage rating of 250 volts, this relay reinforces its capability to withstand voltage transients and enhance overall reliability.