Isolated, Thermocouple Signal Conditioner Model 2B50 FEATURES Accepts J, K, T, E, R, S or B Thermocouple Types Internally Provided Cold Junction Compensation High CMV Isolation: ±1500V pk High CMR: 160dB min @ 60Hz Low Drift: ±1µV/°C max (2B50B) High Linearity: ±0.01% max (2B50B) Input Protection and Filtering Screw Terminal Input Connections APPLICATIONS Precision Thermocouple Signal Conditioning for: Process Control and Monitoring Industrial Automation Energy Management Data Acquisition Systems GENERAL DESCRIPTION The model 2B50 is a high performance thermocouple signal conditioner providing input protection, isolation and common mode rejection, amplification, filtering and integral cold junction compensation in a single, compact package. In thermocouple temperature measurement applications, outstanding features such as low drift, high noise rejection, and 1500V isolation make the 2B50 an ideal choice for systems used in harsh industrial environments. The 2B50 has been designed to condition low level analog signals, such as those produced by thermocouples, in the presence of high common mode voltages. Featuring direct thermocouple connection via screw terminals and internally provided reference junction temperature sensor, the 2B50 may be jumper programmed to provide cold junction compensation for thermocouple types J, K, T, and B, or resistor programmed for types E, R, and S. DESIGN FEATURES AND USER BENEFITS The high performance of the 2B50 is accomplished by the use of reliable transformer isolation techniques. This assures complete input to output galvanic isolation (+1500V pk) and excellent common mode rejection (l60dB @ 60Hz). High Reliability: To assure high reliability and provide isolation protection to electronic instrumentation, the 2B50 has been conservatively designed to meet the IEEE Standard for transient voltage protection (472-1974: SWC) and provide 220V rms differential input protection. High Noise Rejection: The 2B50 features internal filtering circuitry for elimination of errors caused by RFI/EMl, series mode noise, and 50Hz/60Hz pickup. Other key features include: input protection (220V rms), filtering (NMR of 70dB @ 60Hz), low drift amplification (±1µV/°C max 2B50B), and high linearity (±0.01% max - 2B50B). Ease of Use: Internal compensation enables the 2B50 to be used with seven different thermocouple types. Unique circuitry offers a choice of internal or remote reference junction temperature sensing. Thermocouple connections may be made either by screw terminals or, in applications requiring PC Board connections, by terminal pins. APPLICATIONS Small Package: 1.5” X 2.5” X 0.6" size conserves board space. The 2B50 has been designed to provide thermocouple signal conditioning in data acquisition systems, computer interface systems, and temperature measurement and control instrumentation. Information furnished by Intronics is believed to be accurate and reliable. However, no responsibility is assumed by Intronics for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intronics. 1400 Providence Highway, Building #2 Norwood, MA 02062 Phone (781) 551-5500 FAX (781) 551-5555 www.intronicspower.com